I N D E X ・ A – Z

All entries A–Z

Every one of the 879 entries in the English edition, in alphabetical order. Jump to a letter below, or browse by category.

Letter #A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

#

"Girlfriend formation" voice drama

A girlfriend-formation voice drama is a doujin-audio sub-category completing the arc from …

A

A-Spot

Body & Sensation

The A-spot is an erogenous zone said to lie deep in the anterior vaginal wall, before the …

Abdomen (fetish context)

Body & Sensation

The abdomen is the front torso region between thorax and pelvis. In Japanese erotic repres…

Acme (Orgasmic Peak)

Body & Sensation

Acme is a French-derived Japanese loanword for the instant sexual pleasure peaks, a near-s…

Action Eroge

Action eroge is the adult-game category built on real-time action gameplay, with the douji…

Adult Anime (Broad-Sense Animated Erotica)

Adult anime is the Japanese category of animated works centred on sexual content. Surveys …

Adult Creator Economy

The adult creator economy is the sphere in which individuals combine social media and subs…

Adult digital comics and novels (Japan)

Adult digital books are the Japanese category for explicit manga, novels, and photo books …

Adult doujin circle

An adult doujin circle is an individual or small group producing and distributing adult se…

Adult Game (Broad-Sense Adult Video Game)

Adult game is the broad-sense category of video games centred on sexual content. Distingui…

Adult Goods (Sex Toys and Intimate Products)

Adult goods are products designed for sexual pleasure and stimulation, spanning vibrators,…

Adult Magazines (Japan)

Adult magazines (seijin zasshi, ero-hon) are the postwar Japanese periodicals built around…

Adult Toys (Otona no Omocha)

Acts & Techniques

Otona no omocha is the Japanese euphemism for sex toys: vibrators, wands, onaholes, dildos…

Adult-oriented figures

Adult-oriented figures are collectible 1/4 to 1/7 scale figurines of bishōjo characters wi…

Adultery scenario (J-AV genre)

Adultery scenario is the Japanese AV scenario class centred on the married-woman extramari…

After-Bath Fetish

An after-bath fetish is the attraction to a partner just out of the bath: flushed skin, we…

Age of Consent (Japan)

The age of consent is the minimum age at which the law recognises a valid consent to sexua…

Ageha Honte (Swallowtail-Wing Variant of the Missionary)

Acts & Techniques

Ageha honte (swallowtail-wing variant of the missionary) is a missionary derivation in the…

Ahegao

Ahegao is a stylised facial expression in adult manga, doujinshi and anime denoting climax…

Ai Iijima

Ai Iijima (1972-2008) moved from AV actress to television personality and made her autobio…

AI-Generated Erotica

AI-generated erotica is sexual imagery produced by text-to-image diffusion models from 202…

Aibu (foreplay / caress)

Acts & Techniques

Aibu is the Japanese term for caressing and foreplay, encompassing tactile sexual contact …

Airhead-character moe (tennen)

Tennen moe is the attraction to the airhead character who unwittingly shows slow comprehen…

Alcohol and sexual behaviour

Body & Sensation

Alcohol shows dose-dependent biphasic effects: low doses produce disinhibition; high doses…

Anal (anal sex)

Acts & Techniques

Anal in Japanese AV-and-adult vocabulary covers anal-related sexual contact. AV genre esta…

Anal plug (butt plug)

Anal plug or butt plug is the cone-or-onion-shaped adult-toy designed for anal insertion a…

Analingus (Rimming)

Acts & Techniques

Analingus (rimming, anilingus) is oral stimulation of a partner's anus with the mouth and …

Android / Gynoid Erotica

Android and gynoid erotica is the adult genre taking artificial humans as its subject. Per…

Angel-character moe (tenshi)

Angel-character moe is the attraction to angel and fallen-angel characters. White wings, t…

Ankle fetish

Ankle fetish is the body-part-kink category for sexual or aesthetic interest in the ankle'…

Anorgasmia (fukanshō, female sexual dysfunction)

Body & Sensation

Fukanshō names markedly-reduced female sexual response. The Japanese vernacular covers wha…

Anti-Nuisance Ordinance Sexual Offences

The sexual-offence provisions of the Tokyo Anti-Nuisance Ordinance (1962) punish groping, …

Anti-Prostitution Law (1956)

Anti-Prostitution Law is the 1956 Japanese law ending the public-licensed brothel system. …

Apron fetish

Apron fetish is the Japanese-language costume-kink category for sexual interest in women w…

Arch of the foot (tsuchifumazu)

Body & Sensation

Tsuchifumazu is the Japanese term for the arch of the foot, the curved region of the sole …

Armpit fetish (waki)

Armpit fetish (waki) is the international body-fetish for sexual interest in the armpit. R…

Armpit Job (Wakikoki)

Acts & Techniques

Wakikoki, the armpit job, passes the penis into a partner's armpit and rubs it between the…

Article 175 of the Penal Code (Obscenity Distribution)

Article 175 of the Japanese Penal Code punishes the distribution of obscene documents, pic…

Asa-dachi (morning erection)

Acts & Techniques

Asa-dachi is the Japanese term for morning erection: the final nocturnal-penile-tumescence…

Ase (sweat)

Body & Sensation

Ase is the Japanese term for sweat, the fluid from eccrine and apocrine glands. Thermoregu…

Asexual

Asexual names a sexual orientation in which a person experiences little or no sexual attra…

Ashi-fetish (foot fetish)

Ashi-fetish is the Japanese category for foot-and-leg fetish. One of the most widely-docum…

Ashikoki (footjob)

Acts & Techniques

Ashikoki is the Japanese industry term for foot-based genital stimulation. Establishes fro…

Asian Massage Parlour (Asia-Este)

Asia-este is the Japanese category of massage shops staffed by Asian women from China, Kor…

ASMR (Autonomous Sensory Meridian Response)

ASMR is the popular name for a tingling sensation triggered by specific acoustic and visua…

AV actress (AV joyu)

AV actress is the general term for female performers in Japan's adult video industry. This…

AV Actress Branding

AV actress branding is the Japanese adult-video practice of building and managing a solo a…

AV actress secret account

An AV actress secret account is the self-run social media plus paid-platform presence a cu…

AV comeback release (J-AV industry)

AV comeback is the Japanese industry term for the return-from-retirement release of an AV …

AV Debut Work

AV debut work is the Japanese adult-video term for a performer first commercial release. S…

AV kantoku (AV director)

AV kantoku is the Japanese AV industry's directorial role. Established in the 1980s; diffe…

AV Label Culture

AV label culture is the Japanese AV industry practice of branding internal production line…

AV Law (2022 AV Industry Protection Act)

AV Law is Japan's 2022 Act on Prevention of Damages from Appearing in Adult Videos. Covers…

AV Male Performers

AV danyu is the occupational term for male performers in Japanese adult video. It covers t…

AV Male-Actor Agency

An AV male-actor agency manages, dispatches, and trains male AV performers. This entry cov…

AV production company

AV production company is the Japanese AV industry's talent-management agency. Manages perf…

AV Production Set

The AV production set is the filming space and the work of the crew and performers who mak…

AV Scout

An AV scout approaches women on the street or online and refers them to AV production comp…

Awa-awa Play (Soapland Foam Body-to-Body Service)

Acts & Techniques

Awa-awa play is the foam-bath service that defines Japanese soaplands: the worker uses a s…

B

Bachiboko

Bachiboko is a 2010s-onward Japanese internet slang term naming a genre of intense, physic…

Back (senaka)

Body & Sensation

Senaka is the Japanese term for the back, the posterior surface of the trunk. Low in direc…

Back position (doggy style / rear-entry)

Acts & Techniques

Back position (Japanese AV-industry term) is the rear-entry sexual position category cover…

Bakajoshi (Airhead Girl Archetype)

Bakajoshi is the Japanese adult-manga and doujinshi character archetype for a naive, sexua…

Bakunyu

Body & Sensation

Bakunyu is the Japanese size category for breasts larger than kyonyuu, coined as the AV in…

Bandage kink (houtai)

Houtai is the Japanese category for the bandage kink. Anchored on the dual symbolic regist…

Bartholin's gland

Body & Sensation

Bartholin's gland is a paired exocrine gland flanking the vaginal opening, secreting lubri…

Batou (verbal humiliation play)

Batou is the Japanese SM-vocabulary term for consensual verbal-humiliation roleplay. Sits …

BDSM

BDSM acronymises Bondage, Discipline, Dominance, Submission, Sadism and Masochism. Coined …

Belly bulge (hara-kobu)

Belly bulge is the eromanga convention of drawing the insertion as a visible bulge through…

Bijo (beautiful woman)

Body & Sensation

Bijo is the Japanese category for adult women evaluated as having beauty. The evaluation-a…

Bikini fetish

Bikini fetish is the costume-kink for the two-piece female swimsuit with chest top and hip…

Bikyaku (beautiful legs)

Body & Sensation

Bikyaku is the Japanese aesthetic-evaluation term for shapely legs. Built on the 'beauty +…

Binaural audio (recording technique)

Binaural audio is a spatial recording technique using twin microphones at ear positions or…

Bini-hon (Vinyl-Wrapped Adult Books)

History & Culture

Bini-hon were vinyl-sealed adult photo books popular in Japan from the late 1970s to the e…

Binyū (beautiful breasts)

Body & Sensation

Binyū names breasts evaluated for shape rather than size. The 'beauty + breast' compound p…

Bisexual

Bisexual is the sexual-orientation category for sexual or romantic attraction toward two o…

Bishiri (beautiful buttocks)

Body & Sensation

Bishiri is the Japanese aesthetic term for beautifully-shaped buttocks. Stabilised as grav…

Bishōnen

Body & Sensation

Bishōnen is the Japanese aesthetic category for delicately beautiful young male figures in…

Bishoujo (Anime/Manga/Game Character Archetype)

Bishoujo is the Japanese fictional young-female character archetype in postwar manga, anim…

Bishoujo Game (Japanese Dating Sim)

Bishoujo game is the Japanese genre of games centred on the romantic pursuit of female cha…

Biyaku (aphrodisiac)

Biyaku is the Japanese term for aphrodisiac. Modern pharmacology rejects most folk-aphrodi…

BL (Boys' Love)

Boys' Love (BL) is the Japanese genre of male-male romance authored and read by women. Dis…

Blazer School Uniform

Blazer school uniform is the post-1980s Japanese schoolgirl uniform style of jacket plus p…

Bloomers (Japanese school PE shorts)

Bloomers (Japanese sense) are the female school PE shorts worn 1960s-1990s. Now phased out…

Blushing kink (akagao)

Akagao is the Japanese kink for involuntary facial flushing produced by shame or arousal. …

Bob-hair fetish

Bob-hair fetish is sustained sexual interest in the bob-cut hairstyle. 1920s Western moder…

Bodikon (Body-Conscious Fashion)

Bodikon is the Japanese loan-abbreviation of body-conscious: skin-tight fashion that defin…

Body Possession (Hyoui)

Body-possession theme is a supernatural-fiction Japanese genre where one consciousness tra…

Body type

Body & Sensation

Body type is the overall outline, padding, and skeletal balance of the human body. A histo…

Boin (vintage-Japanese for big breasts)

Body & Sensation

Boin is a 1968-coined Japanese onomatopoeic-vernacular term for full and bouncy breasts. F…

Bokki (erection)

Body & Sensation

Bokki is the Japanese term for penile erection, the neurovascular event in which corpus-ca…

Bonyū (breast milk)

Body & Sensation

Bonyū is the Japanese term for breast milk. Covers the lactational secretion produced from…

BOOTH

BOOTH is the e-commerce and mail-order platform pixiv launched in 2013 for individual crea…

Boots fetish

Boots fetish is sustained sexual interest in women wearing boots, especially knee-high lea…

Boshi Soukan (Mother-Son Theme in Fictional Adult Media)

Boshi soukan is the Japanese term for the mother-son theme in fictional adult media. Frame…

Bote-bara (Pregnant Belly)

Body & Sensation

Bote-bara is subcultural slang for the swelling belly of pregnancy and the fetish on that …

Boyfriend Roleplay Audio

Boyfriend roleplay audio is a Japanese women-oriented doujin-audio sub-genre in which male…

Boyish (anime character type)

Boyish is the Japanese moe-attribute archetype for female characters with short hair, masc…

Brassiere (bra)

Brassiere or bra is the upper-body undergarment that supports and covers the breasts. Mode…

Breaking-and-Submission Arc (Wakarase-ochi)

Wakarase-ochi is a fictional doujin genre linking wakarase (humbling an arrogant target) a…

Breeding Press (Tanetsuke Press)

Acts & Techniques

The breeding press is slang for a deep-penetration posture folding the receiver's legs to …

Bukkake

Acts & Techniques

Bukkake is a Japanese loanword for an adult-video staging convention: several performers e…

Bunny girl (Playboy bunny)

Bunny girl is the costume-kink centred on the Playboy Bunny uniform (1960s US): high-leg l…

Burusera Shop History

History & Culture

Burusera shop history covers the 1990s Japanese trade in used schoolgirl uniforms, gymwear…

Business Suit Fetish

Suit fetish in the Japanese-specific form centres on the women's business suit (tailored j…

Business-Trip Genre (Shucchou-mono)

The business-trip genre is an AV situation type centred on sexual contact at the destinati…

Butsudan-gaeshi (Altar-Turn Backbend Position)

Acts & Techniques

Butsudan-gaeshi (Buddhist-altar reversal) is an Edo forty-eight position folding the recei…

Buttocks

Body & Sensation

The buttocks are formed by the rear of the pelvis and the gluteal muscles. An object of ae…

C

Cabaret Culture in Japan

History & Culture

Cabaret culture in Japan is the large nightlife form combining drink, stage shows, and hos…

Cam Girl

A cam girl is a female performer providing sexual content via webcam live-streaming. It co…

Car sex

Acts & Techniques

Car sex is sexual activity in a car interior. Spans consensual private practice and adult-…

Caretaking Fetish

A caretaking fetish is the attraction to the act of tending the sick, injured, or drunk, o…

Casual-speech fetish (tameguchi)

Tameguchi fetish is the attraction to being addressed in casual speech by someone who shou…

CBT (Cock and Ball Torture)

CBT (cock and ball torture) is a branch of BDSM applying stimulation, pressure, and restra…

CG Collection (CG-shu)

CG-shu is a Japanese doujin work format compiling dozens of digital illustrations with bri…

Chakuero (clothed-erotic genre)

Chakuero is the Japanese non-nude erotic video and photo genre. Performers stay clothed in…

Chakui (clothed sex)

Chakui is the Japanese kink-aesthetic for sexual activity in which one or both partners re…

Chastity device (teisoutai)

A chastity device physically restricts the wearer's genital contact, masturbation, and int…

Chausu (Tea-Mill, Edo-Period Cowgirl)

Acts & Techniques

Chausu (tea mill) is the Edo-period cowgirl position, an extreme example of the canonical …

Cheek kink (hoo)

Hoo is the Japanese category for the cheek-kink. Two principal sub-registers: the soft-ful…

Cheerleader fetish

Cheerleader fetish is the costume-kink for women in cheer-uniform: cropped top, pleated mi…

Cheongsam / qipao fetish

Cheongsam / qipao fetish is the costume-kink for the body-hugging Chinese dress with manda…

Chidori (Plover-Track Side-Lying Position)

Acts & Techniques

Chidori (plover) is an Edo forty-eight position: the receiver lies sideways and lifts one …

Chijo

Chijo is the Japanese genre label for sexually assertive women in adult media. Coined as t…

Chijoka (Becoming a Lustful Woman)

Chijoka is the Japanese hentai narrative type in which a chaste, sexually disinterested ch…

Chikan (Public Groping; Criminal Offence)

Acts & Techniques

Chikan is the Japanese criminal offence of public-transit groping. Surveys the criminal-la…

Chikan-Themed Train Media (Fictional Adult Genre)

Chikan-themed train media is a Japanese AV genre depicting staged train scenarios. The art…

Chikubi (nipple)

Body & Sensation

Chikubi is the Japanese term for the nipple: apex of the breast, dual-functioning as milk …

Child-Pornography Law (Japan, 1999)

Japan's child-pornography law, in force from November 1999, punishes the production, provi…

Child-Prostitution Punishment Act (1999)

The 1999 Child-Prostitution Punishment Act criminalises paid sexual conduct with persons u…

Childhood-Friend Scenario

Osananajimi-shichu is a relationship taste in which an opposite-sex friend from early chil…

Chirou (Delayed Ejaculation)

Acts & Techniques

Chirou (delayed ejaculation) is a male sexual dysfunction marked by markedly delayed or ab…

Chitsu (vagina)

Body & Sensation

Chitsu is the Japanese term for vagina: muscular canal of the female reproductive system. …

Choker fetish

Choker fetish is the kink-aesthetic centred on chokers, narrow neck-bands worn close to th…

Chōkyō (training)

Chōkyō is the Japanese SM-narrative subgenre and consensual-practice category for sustaine…

Classroom-setting genre (J-adult fiction)

The classroom-setting genre is a Japanese adult-fiction type centred on the school classro…

Clavicle Fetish (Sakotsu Fetish)

Clavicle fetish is aesthetic and sexual attraction to the shape, hollow, and line of the c…

Clitoris

Body & Sensation

Clitoris is the principal sensory-erotic organ of the external female genitalia. Substanti…

Close-Contact Audio

Close-contact audio reconstructs an embrace from rustling fabric, breathing, and close whi…

Cohabitation scenario (J-AV / hentai genre)

Cohabitation scenario is the Japanese adult-content category for works set in the daily li…

Comiket (Comic Market)

Comiket is the world's largest doujinshi convention, held twice annually in Tokyo. Surveys…

Companion (Banquet / Hot-Spring)

A companion is a female worker dispatched to banquet halls and hot-spring inns to wait on …

Company-Employee AV (Shain-mono)

Shain-mono is the lineage of project AV framed as an AV maker's own staff appearing on cam…

Compilation Edition (Soushuuhen)

The compilation edition is an AV package format that re-edits highlight scenes from alread…

Convulsion (orgasmic spasm)

Body & Sensation

Convulsion is involuntary muscular contraction. In a sexual context it denotes the rhythmi…

Convulsive orgasm (gakugaku-keiren)

Acts & Techniques

Gakugaku-keiren (convulsive orgasm) is the colloquial name for uncontrollable trembling of…

Corpus cavernosum (erectile tissue)

Body & Sensation

Erectile tissue is the spongy vascular tissue of the penis and clitoris. Blood filling the…

Corset

The corset is a women's body-shaping undergarment that compresses the torso from below the…

Cosplay

Cosplay is a Japanese coinage from costume play. It names both the fan-cultural practice o…

Couple sexuality (couple-seikatsu)

Body & Sensation

Couple sexuality is the dynamics of sexual activity, preference, and satisfaction between …

Coupling (CP)

Coupling (CP) is the concept in yaoi and BL culture of designating which character is pair…

Cruising Culture (Hatten-ba)

History & Culture

Hatten-ba culture refers to the urban spaces where gay men in Japan gather for anonymous s…

Cuddle Audio (Soine Voice)

Cuddle audio is a strand of doujin audio in which a performer lying beside the listener at…

D

Dai-inshin (labia majora)

Body & Sensation

Dai-inshin is the Japanese term for labia majora: outermost paired skin folds of the femal…

Dakijizou (Embraced-Buddha Standing-Lift)

Acts & Techniques

Dakijizou (embracing Jizo) is a standing face-to-face Edo forty-eight position where the g…

Dakimakura

A dakimakura is a 150-160 cm body pillow sold in Japanese otaku culture with a printed cov…

Dakimakura cover

A dakimakura cover is a 150-160 cm pillowcase printed with a life-size character on each s…

Dan Oniroku

Dan Oniroku (1931-2011) was a leading postwar Japanese SM novelist who established the mod…

Dark Elf (Fantasy Character Archetype)

The dark elf is a fantasy archetype with pointed ears and dark or tanned skin. In Japanese…

Daruma-gaeshi (Daruma-Doll-Turn Folded Position)

Acts & Techniques

Daruma-gaeshi (Daruma-doll turn) is an Edo forty-eight folded position: the receiver's leg…

Dating-Site Regulation Act (2003)

The 2003 Dating-Site Regulation Act is Japan's law against using internet dating services …

Deai-kei (online dating)

Deai-kei is the general term for internet matchmaking services in Japan, tracing the linea…

Debu Otoko (Fat Bastard / Ugly Bastard)

Debu otoko is the Japanese adult-manga and doujinshi character archetype for the obese mid…

Deep kiss

Acts & Techniques

Deep kiss is the kiss-form involving open-mouth, tongue exchange, and saliva contact. Cent…

Deep throat

Acts & Techniques

Deep throat names the fellatio variant in which insertion passes the soft palate into the …

Deepfake (Synthetic Media)

Deepfake refers to deep-learning-generated synthetic media impersonating real persons. Sur…

Defune (Outbound-Boat Position)

Acts & Techniques

Defune is a withdrawal-type position in the forty-eight hands. Paired with irifune (inboun…

Dekasegi sex work

Dekasegi sex work is short stints in which provincial women travel to urban sex establishm…

Demisexual

Demisexual names a sexual orientation in which sexual attraction arises only after a stron…

Demon Girl Moe (Akuma Chara)

Akuma chara moe is the Japanese otaku archetype for attraction to demon, succubus, and dev…

Demon-Queen / Evil-Spirit Erotic Content

Demon-queen and evil-spirit erotic content is the Japanese adult-fiction genre of female d…

Demon-Summoning Erotic Content

Demon-summoning erotic content is a Japanese supernatural-fiction adult genre. The protago…

Denim fetish

Denim fetish is sustained sexual interest in women wearing denim or jeans. Centred on the …

Denma (wand massager)

Denma is the Japanese AV-industry term for the wand-style household massager repurposed as…

Deriheru (Delivery Health)

Deriheru (delivery health) is a store-less category of Japanese sex-work business in which…

Desire to Be Restrained (Shibarareru)

The desire to be restrained is the bottom-side longing in rope-bondage SM: arousal at havi…

Dialect Fetish (Hougen)

Dialect fetish is the aesthetic and erotic preference in Japanese fan culture for regional…

Dispatch Host

A dispatch host is a male staffer sent to a female customer's location for in-person servi…

Dispatch-type sex work

Dispatch-type sex work sends workers to a customer's chosen location. Classified under the…

DL Doujin Culture

History & Culture

DL doujin culture is the practice and industry of distributing doujin works as digital dat…

DLsite

DLsite is Japan's largest indie-content download platform, operated by Eisys since 1996. C…

Documentary-style AV (J-AV genre)

Documentary-style AV is the post-2000 J-AV genre staging the recruiting and shooting proce…

Dōgan fetish (baby-faced adult)

Dōgan fetish is the kink for adult women whose faces appear strikingly younger than their …

Dopamine and Sexual Pleasure

Body & Sensation

Dopamine and sexual pleasure: the neurobiology of the mesolimbic reward system, its role i…

Dosukebe (Super-Lewd Character Type)

Dosukebe is the Japanese otaku character archetype for a perpetually horny, sexually forwa…

Dōtei (male virginity)

Body & Sensation

Dōtei is the Japanese term for male virginity. Originates in Buddhist celibacy vocabulary;…

Double penetration (DP)

Acts & Techniques

Double penetration (DP) is the simultaneous insertion of two organs into a receiving partn…

Doujin audio (Japanese independent audio works)

Doujin audio is the Japanese category for self-published audio works: situational voice, v…

Doujin game (Japanese self-published video games)

Doujin game is the Japanese category for self-published video games produced outside comme…

Doujin video (independent adult video)

Doujin video is the Japanese category for adult video produced independently of the commer…

Doujinshi

Doujinshi is the Japanese term for self-published, fan-edited print works. Institutionalis…

Droopy-eyes fetish (tareme)

Tareme fetish is the pull felt toward downturned eyes whose outer corners slope down. It r…

Dyspareunia

Body & Sensation

Dyspareunia is persistent or recurrent genital pain associated with sexual intercourse. Fa…

E

Ear-Cleaning Audio

Ear-cleaning audio records the cleaning of the ear with a pick or swab, binaurally capturi…

Ear-Licking Audio

Ear-licking audio is the doujin-audio strand recording the licking and contact sounds of t…

Eating-Sound Fetish (Shokuji-Oto Fetish)

Eating-sound fetish is attraction to the chewing, swallowing, and oral sounds people make …

Ecchi (Japanese Softcore Erotic Genre)

Ecchi is Japanese slang, from the letter H in hentai, for anything sexy or lewd. In Englis…

Ecstasy (Sexual)

Body & Sensation

Ecstasy (Greek ekstasis, 'standing outside oneself') denotes rapture and self-loss. In a s…

Edo-Period Sexual Culture

History & Culture

Edo-period sexual culture is the whole of sexual practices and institutions in Japan from …

Ejaculation

Acts & Techniques

Ejaculation is the expulsion of semen from the male urethra, typically concurrent with org…

Ekiben (position)

Acts & Techniques

Ekiben is the Japanese AV-industry term for a face-to-face standing position in which one …

Electric massager torment (J-AV subgenre)

Denma-zeme is the J-AV staging style in which an industrial electric massager is held agai…

Enjo Kosai (Compensated Dating)

Enjo kosai is the Japanese term for a woman receiving money from a man for companionship a…

Entertainment Business Control Act (Fueihou)

The Fueihou is Japan's 1948 Entertainment Business Control Act, the principal statute regu…

Erectile dysfunction (bokki-shougai)

Body & Sensation

Erectile dysfunction (ED) is the inability to achieve or maintain erection for sexual acti…

Ero ASMR

Ero ASMR is the Japanese adult audio genre applying binaural ASMR techniques to consensual…

Ero guro

Ero guro is the Japanese genre fusing erotic and grotesque imagery in fiction. Rooted in t…

Eroge

Eroge is the Japanese category for adult-themed computer games: early-1980s PC origins, la…

Eroge music culture (J-adult game soundtracks)

Eroge music culture is the body of soundtracks, theme songs, and composer practice for Jap…

Eroge voice actress culture (J-adult game industry)

Eroge voice actress culture is the working culture of female voice actresses in Japanese a…

Erogenous zone

Body & Sensation

An erogenous zone is a body region of heightened responsiveness to sexual stimulation, div…

Eromanga

Eromanga is the Japanese category for adult-oriented manga: 1970s sanryū-gekiga origins, t…

Erotic asphyxiation (kubishime play)

Acts & Techniques

Kubishime play (erotic asphyxiation) compresses the neck during sex to restrict oxygen, a …

Erotic Content in Youth Manga

History & Culture

Erotic content in youth manga is the sexually suggestive work in non-adult shonen and sein…

Erotic fiction (ero-shōsetsu)

Ero-shōsetsu is the broad Japanese category for prose fiction with sexual-content focus, s…

Erotic Poetry in the Man'yoshu

History & Culture

Erotic poetry in the Man'yoshu is the love and sex poems of Japan's oldest poetry antholog…

Erotic RPG

Erotic RPG is the collective term for adult games built on turn-based combat, growth, and …

Eugenic Protection Act and Forced Sterilization

The Eugenic Protection Act, in force in Japan from 1948 to 1996, authorized forced sterili…

Ex-Gravure Streamer

Ex-gravure streamer denotes a woman with a gravure-idol or swimsuit-model background who r…

Ex-Idol Streamer

Ex-idol streamer denotes a woman with an underground-idol, voice-acting, or idol-group bac…

Exclusive Contract Actress

An exclusive contract actress is an AV performer who signs an exclusive-appearance contrac…

Exiting Sex Work (Datsu-Fuzoku)

Datsu-fuzoku is the concept and support movement around leaving the sex industry and the c…

Expression Regulation (Japan)

Expression regulation is the umbrella term for limits on expression and its distribution b…

Eye kink (me-fetish)

Me-fetish covers preference for the eye region as a sexual-aesthetic focus, split between …

F

Face-burying position (kao-nose)

Acts & Techniques

Kao-nose is the term for burying the face against part of a partner's body, a passive cont…

Face-sitting (ganmen-kijōi / queening)

Acts & Techniques

Ganmen-kijōi is the Japanese term for face-sitting / queening. The position reverses the a…

Facial features

Body & Sensation

Facial features denote the overall arrangement and form of the eyes, nose, mouth, and outl…

Fantasy setting (J-eroge and adult game genre)

Fantasy setting is the Japanese adult-content category for works in a high-fantasy world o…

Fantia

Fantia is a Japanese creator-support platform launched in 2016 by the Toranoana group. Cen…

FANZA

FANZA is the Japanese adult-content platform DMM.com rebranded from DMM.R18 in August 2018…

Fashion Health (Store-Based Adult Service)

Fashion health is a Japanese store-based adult service established after the 1985 Fueihou …

Female-initiated seduction (uridashi-kei)

Uridashi-kei is the character type and kink in which a woman actively sells her sexual app…

Female-Oriented Doujin

Female-oriented doujin is the collective term for doujinshi, audio, and games made with wo…

Female-teacher genre (J-adult fiction)

The female-teacher genre is a Japanese adult-fiction situation type placing a fictional ad…

Fera (fellatio / blowjob)

Acts & Techniques

Fera is the Japanese term for fellatio, oral stimulation of the penis. Latin fellatio is c…

Fetishism

Fetishism binds strong, persistent sexual arousal to a specific object, body part, materia…

Fighting-game erotic fan art

Fighting-game erotic fan art is the Japanese adult doujin field centred on the female char…

Fingering (Teman)

Acts & Techniques

Teman is the Japanese term for stimulating the vulva and vagina with the fingers. This ent…

Fisting

Acts & Techniques

Fisting names the consensual insertion of a fist or substantial part of the hand into the …

Flank (waki-bara)

Body & Sensation

Waki-bara is the Japanese term for the flank, the lateral trunk from the lower ribs to the…

Flight Attendant Genre (Stewardess Theme)

Flight attendant genre is a Japanese AV category featuring airline cabin crew in uniform. …

Food Play (Shokumotsu Play)

Acts & Techniques

Food play is using food as a tool or medium in sex: spreading chocolate, cream, fruit, or …

Forcible Sexual Intercourse Offence (2017–2023)

The forcible sexual intercourse offence was the sex-crime category under Penal Code Articl…

Foreign-national sex work in Japan

Foreign-national sex work in Japan is sex work by non-citizen women, from the 1980s Filipi…

Foreplay (Zengi)

Acts & Techniques

Zengi, foreplay, is the preparatory phase before penetrative intercourse, raising arousal …

Foreskin

Body & Sensation

The foreskin is the mobile fold of skin covering the glans. With outer and inner laminae, …

Four-Hour Package

The four-hour package is an AV product format selling around 240 minutes of running time a…

Freckles Fetish (Sobakasu Fetish)

Freckles fetish is attraction to the freckles scattered across the cheeks and nose. Tied t…

Freedom of Expression (Japan)

Freedom of expression is the fundamental right under Article 21 of Japan's Constitution. I…

Frenulum (penile frenulum)

Body & Sensation

The penile frenulum is a thin V-shaped fold of tissue connecting the underside of the glan…

Fudeoroshi (Sexual Initiation by an Older Woman)

Acts & Techniques

Fudeoroshi is the Japanese idiom for an older woman giving a virgin young man his first se…

Fujoshi

Fujoshi is a self- and other-applied term for women who enjoy BL or yaoi. Coined on Japane…

Full Nelson position

Acts & Techniques

Full Nelson is a rear-entry variant adapted from the wrestling hold, the inserting partner…

Fundoshi

Fundoshi is the Japanese traditional loincloth: a long fabric strip wound around the hips.…

Futami-ga-ura position

Acts & Techniques

Futami-ga-ura is a standing face-to-face forty-eight-hands position, the paired upright po…

Futanari

Body & Sensation

Futanari is a Japanese subculture term for fictional characters combining female- and male…

Futomomo (thigh fetish)

Futomomo-fetish is the Japanese aesthetic for thighs as an independent erotic body-region.…

Fuzoku (sex industry)

Fuzoku is the umbrella term for Japan's regulated adult-entertainment trades, especially s…

Fuzoku-jo (sex-industry worker)

Fuzoku-jo is the general term for women working in Japan's sexual-service businesses, the …

G

G-Collection

G-Collection is a domestic platform selling individually filmed adult video and photograph…

G-spot

Body & Sensation

G-spot is the colloquial name for a putative high-sensitivity region of the anterior vagin…

Gag play (sarugutsuwa)

Gag play uses an object in the mouth to restrict speech as a BDSM practice. Anchored on th…

Gakuen-mono (School-Setting Genre)

Gakuen-mono is the Japanese narrative category for stories set inside schools and academie…

Gangimari (Drugged-Face Expression)

Gangimari is the Japanese adult-manga and doujinshi visual sign-set for the face of a char…

Gansha (facial cumshot)

Acts & Techniques

Gansha is the Japanese AV-industry term for male ejaculation onto the female partner's fac…

Gap Moe (Gyappu Moe)

Gap moe is the Japanese otaku term for sexual or romantic attraction to characters who rev…

Gari (skinny / thin-frame body)

Body & Sensation

Gari is the Japanese body-category for an extreme-thin frame where rib, clavicle, and pelv…

Garter belt

Garter belt is a strap-and-clip undergarment for holding thigh-high stockings in place. Ma…

Gay (Japanese context)

Gay is the orientation category for men whose attraction is toward men. The entry covers t…

Geigi (geisha)

Geigi (geisha) is the occupational type of women who perform music and dance at banquets. …

Genius-character moe (tensai)

Tensai moe is the attraction to the genius or prodigy character. The standard design pairs…

Gibo (mother-in-law / stepmother kink)

Gibo is the Japanese kinship-term for mother-in-law or stepmother. Adult-content uses gibo…

Girlfriend Roleplay Audio (J-ASMR)

Girlfriend roleplay audio is a Japanese male-targeted genre in which a voice actress plays…

Girls' bar

A girls' bar is a venue where female staff serve drinks across the counter. This entry cov…

Gishi (stepsister / sister-in-law kink)

Gishi is the Japanese kinship-term for elder stepsister or elder sister-in-law. Adult-fict…

Go Nagai

Go Nagai (born 1945) is a Japanese manga artist whose Harenchi Gakuen, Devilman, and Cutie…

Gojo Rakuen

History & Culture

Gojo Rakuen was a former pleasure quarter and red-line district in Kyoto. Rooted in Edo-pe…

Gokkun

Acts & Techniques

Gokkun is the Japanese AV genre name for scenes that foreground swallowing of ejaculate. T…

Golden Age of Pink Film

History & Culture

The golden age of pink film runs from the 1962 work Flesh Market to the early 1980s, when …

Gosho-guruma position

Acts & Techniques

Gosho-guruma is a flexed-missionary forty-eight-hands position in which the receiving part…

Gothic Lolita

Gothic Lolita is a Japanese fashion style fusing Victorian girls' dress with black gothic …

Gravure (Japanese idol photo genre)

Gravure is the Japanese magazine genre of large-format idol and model photography, the cen…

Gravure AV (J-AV with gravure-idol or gravure-style production)

Gravure AV is the Japanese AV category covering both performers who entered AV from gravur…

Gravure idol

Gravure idol is the general term for female talent appearing in swimwear in photo magazine…

Group sex (fukusū-play)

Acts & Techniques

Fukusū-play is the Japanese industry-and-vernacular term for sexual scenes with three or m…

Gyaku-nan (Reverse Pickup)

Gyaku-nan is the Japanese slang for a woman approaching an unknown man in public to propos…

Gyara-nomi (paid drinking)

Gyara-nomi is an app-mediated trade where men pay an hourly fee to share a few hours of fo…

Gyaru

Gyaru is a subcultural type and fashion style of young Japanese women from the 1980s. This…

Gym uniform (Japanese school PE attire)

The gym uniform is the athletic dress of Japanese school PE classes. In adult media it nam…

H

H!NEXT

H!NEXT is the former name of the monthly flat-rate AV streaming service run by FANZA. This…

Haiboku (Defeat-Themed Genre)

Haiboku is the Japanese adult-doujinshi narrative type in which a defeated battle-heroine …

Hair kink (kami fetish / trichophilia)

Kami fetish (trichophilia) is the kink for hair as the principal arousal object: length, c…

Hamedori

Hamedori is the Japanese AV term for first-person, participant-operated camera work. Conso…

Hana to Hebi (Flower and Snake)

Hana to Hebi (Flower and Snake) is Dan Oniroku's 1962 SM novel and its many film adaptatio…

Hand fetish (te-fetish)

Hand fetish is attraction to a woman's hands, palms, and fingertips. The hand is the body'…

Happening bar

A happening bar is a Japanese membership bar where consensual sexual contact between adult…

Haraguro Moe (Two-Faced Character Appeal)

Haraguro moe is the Japanese otaku archetype for attraction to characters whose surface pr…

Haramase-mono (impregnation genre)

Haramase-mono is the Japanese fictional genre that makes impregnating a female character t…

Hard Pounding (Gan-tsuki / Geki-pisu)

Gan-tsuki is the Japanese adult-video industry term for sustained, high-speed, deep penetr…

Harem genre (Japanese fictional configuration)

Harem is the Japanese narrative configuration in which a single fictional protagonist is s…

Haruhon-shi (History of Japanese Erotic Books)

History & Culture

Haruhon-shi is the history of erotic book media in Japan, from Edo koshoku-bon through Mei…

Hataori (weaving stroke)

Acts & Techniques

Hataori is an Edo forty-eight-hands term for rhythmically alternating deep and shallow thr…

Hatsutaiken (first sexual experience)

Acts & Techniques

Hatsutaiken is the Japanese gender-neutral term for the first sexual experience. The regis…

Hazukashi Play (Embarrassment Play)

Hazukashi play deliberately produces shame in the receiving partner and makes that emotion…

Heartbeat Voice (Shinon Voice)

Heartbeat voice is a strand of doujin audio thematising the heartbeat and breathing record…

Heat (Omegaverse)

Heat is the cyclical reproductive phase in omegaverse (ABO) fiction that drives omega char…

Height Difference Fetish

Height difference fetish is sexual or aesthetic attraction to a large height gap between p…

Hentai (the term)

Hentai is a Japanese word with three senses: the early-1900s sexological term for atypical…

Hentai 3D

Hentai 3D is Japanese-style adult work built from 3D computer models rather than hand-draw…

Hentai Anime

Hentai anime is the narrative animated form of Japanese adult animation, marked by longer …

Hentai ASMR

Hentai ASMR is the audio-only branch of Japanese adult media, built on binaural recording …

Hentai Cosplay

Hentai cosplay is sexualised costume play tied to anime, manga, and game characters, spann…

Hentai Doujin

Hentai doujin is the self-published, fan-circulated branch of Japanese sexual comics, sold…

Hentai Game

Hentai game is the umbrella term for Japanese adult video games, dominated by visual novel…

Hentai Manga

Hentai manga is the print and digital form of explicitly sexual Japanese comics, spanning …

Hentai Uncensored

Uncensored hentai is Japanese adult anime, manga, and games shown without the mosaic requi…

Hentai Video

Hentai video is the animated form of Japanese adult moving image, distinct from live-actio…

High heel

High heel is, in adult contexts, women's high-heeled footwear as a core clothing-fetishism…

Hikikomori Character Moe

Hikikomori character moe is the Japanese preference for characters who avoid society and s…

Hime-dorei (princess-slave fantasy)

Hime-dorei is the Japanese fictional kink-narrative subgenre depicting captive high-born f…

Hime-hajime

History & Culture

Hime-hajime is a Japanese calendar term for the New Year's first activity. Recorded in Edo…

Hinnyu

Body & Sensation

Hinnyu is the Japanese word for small breasts, originally coined as a contrastive opposite…

Hips and lower back

Body & Sensation

Koshi is the colloquial name for the lumbar region of the central torso. It is the centre …

History of Adult Culture in Japan (2000s)

History & Culture

The history of adult culture in 2000s Japan covers the sex industry and erotic media of th…

History of Doujin Events

History & Culture

A history of doujinshi convention culture from the first Comic Market in 1975 to today, tr…

History of Japanese Adult Video (AV)

History & Culture

The history of Japanese adult video covers the postwar trajectory from the 1981 video-cass…

History of Manga Regulation

History & Culture

The history of manga regulation surveys Japanese manga censorship from prewar publication …

History of Sentō (Public Bathhouses) in Japan

History & Culture

Sentō culture is the bathing culture built around Japanese public bathhouses from the Edo …

History of Sex Education in Japan

History & Culture

The history of sex education in Japan runs from Meiji reproductive hygiene through postwar…

History of Sex Workers in Japan

History & Culture

The history of sex workers in Japan traces women in sexual labour from ancient ritual thro…

History of Sexology

History & Culture

The history of sexology is the intellectual lineage of the scientific study of human sexua…

History of Sexuality in East Asia

History & Culture

The history of sexuality in East Asia compares the sexual norms and institutions of China,…

History of Sexuality in Europe

History & Culture

The history of sexuality in Europe runs from the fall of Rome to the early twentieth centu…

History of Shunga

History & Culture

The history of shunga is the arc of Japanese erotic painting from late-Heian caricature th…

History of the American Pornography Industry

History & Culture

The history of American pornography spans the 1907 stag-film era, the 1970s Porno Chic per…

History of the Condom

History & Culture

The history of the condom runs from early-modern linen sheaths through Goodyear's 1844 rub…

History of the Vibrator

History & Culture

The history of the vibrator traces a device that moved from medical and household applianc…

History of Venereal Disease in Modern Japan

History & Culture

The history of venereal disease in modern Japan covers STD epidemics and response from the…

Hitozuma (married woman)

Hitozuma names a woman with a spouse, and in subculture it is a representative human-type …

Hizaura (back-of-knee fetish)

Hizaura-fetish is the niche aesthetic-and-erotic interest in the back of the knee. The pop…

Hobashira (mast position)

Acts & Techniques

Hobashira is the forty-eight hands position where the man stands erect and the woman is li…

Hokake-chausu position

Acts & Techniques

Hokake-chausu is an Edo forty-eight-hands cowgirl variant in which the receiving partner r…

Honban (full-service in Japanese sex work)

Honban is the Japanese sex-work industry term for full-service penetrative sex. It marks t…

Host club

A host club is a venue where male staff sit beside female customers to serve drinks and co…

Hotel health (hoteheru)

Hoteheru (hotel health) is a dispatch sex business using love hotels for service. This ent…

Hourglass figure (dekoboko)

Body & Sensation

Dekoboko is the Japanese term for the hourglass figure: a body shape with marked bust-wais…

HPV and sexuality

Body & Sensation

HPV is the most common sexually transmitted virus; most sexually active adults are infecte…

I

Idol-producer theme (J-adult media)

The idol-producer theme is a Japanese adult-fiction situation genre depicting scenarios be…

Ihara Saikaku

Ihara Saikaku (1642-1693) was an early-Edo haikai poet and ukiyozoshi author whose amorous…

Ijiru (to fiddle / play with)

Acts & Techniques

Ijiru is a Japanese verb for manipulating something finely with the fingers, used in sex a…

Ikemen Worship

Ikemen worship is the Japanese cultural preference for conventionally attractive men, cent…

Illustration collection (doujin art book)

An illustration collection is an adult art-book format gathering a single artist's illustr…

Independent Adult Content Sales

Independent adult content sales is the form in which an individual or small group self-con…

Independent Creator Fan Events

Independent creator fan events are fan-interaction gatherings a solo creator organises wit…

Influencer-erotica

Influencer-erotica is selling sexual content directly through a paid platform on the base …

Inkaku (clitoris, formal Japanese anatomical name)

Body & Sensation

Inkaku is the formal Japanese anatomical name for the clitoris: glans, body, paired crura,…

Inkya-kei (Introverted-Character Type)

Inkya-kei is the Japanese youth-slang archetype category for introverted, withdrawn, otaku…

Inmon (lewd crest)

Inmon is the Japanese hentai convention of fictional magical sigils on a character's lower…

Inner thigh

Body & Sensation

The inner thigh is the skin on the inner side of the thigh, closest to the genitals. Thin …

Inran (Lewd Character Type)

Inran is an old Sino-Japanese word for a sexually assertive person, re-articulated in mode…

Intersex

Body & Sensation

Intersex names variation in sex characteristics not fitting typical male or female. Centra…

Interview-Themed AV (Mensetsu-mono)

Interview-themed AV is a Japanese adult-video sub-genre that re-enacts the casting or pre-…

Inu-kake (dog-mount position, Edo 48-positions)

Acts & Techniques

Inu-kake is the Edo classical name for the dog-mount rear-entry position within the shijūh…

Iribitari (Lodger Cuckolding)

Iribitari is a cuckolding narrative type in which a third party lingers long-term in a hou…

Irifune position

Acts & Techniques

Irifune is a face-to-face forty-eight-hands position, the inserting partner drawing the hi…

Iro-otoko and Iro-onna (Lover Archetypes)

History & Culture

Iro-otoko and iro-onna are Japanese archetypes combining physical beauty with romantic ski…

Irrumatio

Acts & Techniques

Irrumatio names active-penetrator oral sex: the penetrating partner is active, the receivi…

Isekai genre (Japanese fantasy/adult setting)

Isekai is the Japanese genre in which a modern protagonist is reincarnated into a sword-an…

Ishukan

Ishukan is the Japanese fictional genre depicting sexual encounters between humans and non…

J

Japanese Adult Video (AV)

Adult Video (AV) is the Japanese category of adult video productions that emerged in 1981 …

JAV Genre Classification

History & Culture

JAV genre classification sorts Japanese adult video by performer attributes, settings, act…

Jawline Fetish

Jawline fetish is a Japanese fan-culture term for sexual or aesthetic attraction to the co…

Jihanki-bon (Vending-Machine Adult Magazines)

History & Culture

Jihanki-bon were adult magazines sold from roadside vending machines in late-1970s to earl…

Jirashi (teasing / sexual denial)

Acts & Techniques

Jirashi is the Japanese umbrella term for teasing techniques: deliberate interruption of s…

JK Business

JK business is the umbrella term for services that have schoolgirls, or women posing as th…

Joi (Female Doctor)

Joi is the female-doctor attribute: a mature woman bearing white coat, stethoscope, and ex…

Josouka (cross-dresser)

Josouka is a general term for a person born male who adopts feminine dress, appearance, an…

Jukujo (mature woman)

Jukujo names mature women, late thirties onward, as a character-archetype-and-genre catego…

K

Kakato (heel of the foot)

Body & Sensation

Kakato is the Japanese term for the heel of the foot: the calcaneus-overlying region. Body…

Kāma Sūtra

History & Culture

The Kāma Sūtra is a Sanskrit classic on sex, love, and conduct, composed in India around t…

Kamo-no-irikubi position

Acts & Techniques

Kamo-no-irikubi is a forty-eight-hands position in which the inserting partner crouches lo…

Kanchou (enema, in adult-fiction context)

Acts & Techniques

Kanchou names the enema procedure and its derivative use in fictional adult SM, training, …

Kankin (Confinement)

Kankin names a confinement-themed fiction genre and time-limited, consensual restraint pla…

Kannō-shōsetsu (Japanese commercial erotic fiction)

Kannō-shōsetsu is the Japanese literary-commercial-paperback erotic fiction sub-genre, dis…

Kannon-biraki (V-spread pose)

Acts & Techniques

Kannon-biraki is a Japanese pose-and-position name from Buddhist shrine cabinet imagery: l…

Kaori Kuroki

Kaori Kuroki is a Japanese AV actress who debuted in 1986. As a university student with an…

Karigakubi position

Acts & Techniques

Karigakubi is an Edo forty-eight-hands position embracing the neck and shoulders from behi…

Kasshoku (tan / brown skin tone)

Body & Sensation

Kasshoku is the Japanese inclusive skin-tone category for tan-to-brown complexions, coveri…

Kasshoku (tan-skin kink)

Kasshoku is the Japanese aesthetic-fetish for tanned, sun-browned, or cosmetically-tanned …

Kasutori Magazines

History & Culture

Kasutori magazines were cheap pulp periodicals that flooded postwar Japan, printed on poor…

Kawaii

History & Culture

Kawaii is a Japanese aesthetic centred on affection for smallness, youth, and innocence. S…

Keigo Fetish (Polite-Speech Kink)

Keigo fetish is attraction to a partner who keeps polite, formal speech. The appeal turns …

Kemono

Kemono is the Japanese subculture of anthropomorphic-animal characters and their fan commu…

Kemonomimi (beast-ear character)

Kemonomimi is the moe character archetype of humanoid figures with animal ears and tail. D…

Kiban

Kiban is Japanese sex-industry jargon for a venue, or the act itself, in which penetrative…

Kichiku-kei (brutal-abuse genre)

Kichiku-kei is a Japanese adult-fiction genre foregrounding violent, antisocial, non-conse…

Kichiku-zeme (intense fictional kink)

Kichiku-zeme is the Japanese fictional sub-genre of intense torment-and-restraint scenes i…

Kijoui (cowgirl position)

Acts & Techniques

Kijoui is the Japanese position-name for the receiving partner above the inserting partner…

Kikaku Actress

Kikaku actress is the Japanese AV-industry category for performers who work across multipl…

Kikaku AV (planning-format AV)

Kikaku AV is the mass-produced Japanese AV line that puts a planning concept, not an indiv…

Kimeseku (Chemsex)

Kimeseku is Japanese slang for sex under stimulant drugs. Known in English as chemsex, it …

Kimiko Matsuzaka

Kimiko Matsuzaka is a Japanese AV actress who debuted with Diamond Eizo in 1989. She is cr…

Kimomen (Ugly Bastard)

Kimomen is Japanese slang for an adult male character whose looks are coded as repellent. …

Kimono

Kimono is the generic name for Japanese traditional dress. In fetish-aesthetics it functio…

Kinbaku

Kinbaku is the Japanese tradition of erotic rope-tying. Distantly descended from Edo-perio…

Kinniku (muscle aesthetic)

Body & Sensation

Kinniku is the Japanese term for muscle in both anatomical and aesthetic registers. In adu…

Kinpatsu (blonde-hair attraction)

Kinpatsu is the Japanese vocabulary for attraction to blonde hair. The register names fore…

Kitan Club

History & Culture

Kitan Club was a Japanese SM and fetishism reader-contribution magazine published 1947-197…

Kitou (Glans Penis)

Body & Sensation

Kitou is the glans penis: the bulbous distal end of the penis, formed by the expanded corp…

Knee-high socks (kink)

Knee-highs are over-the-knee socks ending mid-thigh, central to Japanese costume kink. The…

Kojin AV (Independent Adult Video)

Kojin AV is independent adult video planned, shot, edited, and sold end to end by an indiv…

Kojin Satsuei (Personal Recording)

Kojin satsuei (personal recording) is the umbrella term for adult video shot and distribut…

Koneageru (to knead up)

Acts & Techniques

Koneageru is a caress verb for stimulating an erogenous zone with pressure in a circular o…

Konyoku (Mixed Bathing)

History & Culture

Konyoku is mixed-sex bathing in a shared bath, the basic form of Japanese bathing until re…

Koshi-guruma position

Acts & Techniques

Koshi-guruma is a flexed-missionary forty-eight-hands derivative, the inserting partner le…

Koshu Benjo (Public Toilet, Derogatory Metaphor)

Koshu benjo (public toilet) is a derogatory metaphor likening to a sanitary facility a wom…

Kotoba-zeme (verbal teasing)

Acts & Techniques

Kotoba-zeme is the use of words during sex to provoke a partner's shame, submission, and a…

Kotobuki-shibari (auspicious-kanji shibari)

Acts & Techniques

Kotobuki-shibari is the Edo-period shibari-and-coupling configuration where the receiving …

Kougan (Testicle)

Body & Sensation

Kougan is the testicle: the paired male organ for sperm production and male-hormone secret…

Koukai Play (Public Play)

Koukai play is consensual sexual or SM practice performed before an audience, set in SM ba…

Koukotsu (rapture)

Body & Sensation

Koukotsu is a classical Chinese-derived word for a dazed, entranced state. Dating to Zhuan…

Koumon (anus)

Body & Sensation

Koumon is the Japanese clinical and vernacular term for the anus. The anatomy is shared ac…

Kousai Club (Introduction Club)

Kousai club is a membership business introducing women one-to-one to vetted, fee-paying ma…

Kousoku (restraint / bondage)

Kousoku is the Japanese vocabulary for restraint and bondage, covering both the physical t…

Kubi Fetish (Neck Fetish)

Kubi fetish is attraction to the neck, nape, and throat-line. Its pull comes from a part p…

Kubire (waist curve)

Body & Sensation

Kubire is the Japanese term for the indented waistline between bust and hip. The English h…

Kuchi (mouth)

Body & Sensation

Kuchi names the mouth in everyday Japanese, covering the oral cavity from lips through ton…

Kuchibiru (lips)

Body & Sensation

Kuchibiru is the Japanese vernacular for the lips, the mucocutaneous transition around the…

Kukkyokui (Flexion Position)

Acts & Techniques

Kukkyokui, the flexion position, is a missionary derivative in which the supine receiver f…

Kunni (cunnilingus)

Acts & Techniques

Kunni is the Japanese clipped form of cunnilingus, the oral stimulation of the female geni…

Kunni-uke (preference for receiving cunnilingus)

Kunni-uke names the receiver-side desire in cunnilingus: the structural pleasure of being …

Kuritorisu-zeme (clitoral stimulation play)

Acts & Techniques

Kuritorisu-zeme names focused, intensive stimulation of the clitoris by finger, mouth, or …

Kuro Gyaru (Black Gyaru)

Kuro gyaru is the gyaru type that darkens the skin by tanning or makeup, and the taste for…

Kuruwa (Pleasure Quarter)

History & Culture

Kuruwa is the general term for the shogunate-licensed pleasure quarters of early-modern Ja…

Kusuguri (tickling)

Kusuguri is the Japanese term for tickling. Tickle-play as a kink operates within consent-…

Kuudere

Kuudere is a character archetype who stays cool and expressionless but shows affection (de…

Kyabakura

Kyabakura is the Japanese hospitality category in which female staff sit beside customers …

Kyodaika (Giantess)

Kyodaika is the Japanese genre of dramatically enlarged figures. In adult media it overlap…

Kyōei-mizugi (competitive swimsuit fetish)

Kyōei-mizugi is the Japanese kink configuration around women's competitive racing swimwear…

Kyokon (large penis)

Body & Sensation

Kyokon is the Japanese colloquial term for an above-average-size penis. The Japanese regis…

Kyonyuu

Body & Sensation

Kyonyuu is the modern Japanese word for large breasts. Popularised through 1980s gravure a…

Kyoudai Soukan (Sibling Incest Genre)

Kyoudai soukan is a fiction type depicting siblings as objects of sexual desire. An adults…

L

Labia minora (sho-inshin)

Body & Sensation

Sho-inshin is the Japanese term for labia minora: the paired thin skin folds inside the vu…

Ladies' comics (redikomi)

Ladies' comics (redikomi) are Japanese adult women's manga for housewives aged 30 and over…

Latex fetish (latex_kink)

Latex fetish is the kink-aesthetic for thin latex-rubber garments worn against the skin, w…

Laughter fetish (waraikata)

Waraikata fetish is the pull felt toward a person's way of laughing, laugh-voice, and smil…

Leotard

Leotard names the close-fitting one-piece worn in gymnastics, ballet, and dance, and the t…

LGBTQ

LGBTQ is an acronym for Lesbian, Gay, Bisexual, Transgender, and Queer or Questioning, an …

Libido

Body & Sensation

Libido is the Freudian psychoanalytic concept for the sexual energy underlying psychic act…

Licensed Prostitution System

History & Culture

The licensed prostitution system was modern Japan's state regime for registered prostitute…

Lingerie

Lingerie is the decorative-and-erotic underwear category in contemporary fashion. The Fren…

Live chat (adult webcam streaming)

Live chat is real-time interactive adult-streaming where viewers tip performers via tokens…

Live-action eroge

Live-action eroge are adult computer games using filmed footage or photographs as material…

Long-hair kink

Long-hair kink covers preference for hair below the shoulder, often waist-length. Read acr…

Loss of Male Virginity

Acts & Techniques

Doutei soushitsu is the Japanese expression for a man's first intercourse, leaving virgini…

Loss of Virginity (Shojo Soushitsu)

Acts & Techniques

Loss of virginity (shojo soushitsu) is the Japanese term for an adult woman's first interc…

Lotion (lubricant and lotion play)

Acts & Techniques

Lotion is the Japanese term for sexual lubricant and for lotion play, coating the body in …

Love doll

A love doll is a life-size human-figure doll for sexual or companion use. Silicone and TPE…

Love hotel

A love hotel is a Japan-specific short-stay accommodation for couples. Operates under the …

Lucky sukebe (accidental fanservice)

Lucky sukebe is the Japanese manga and anime device in which a protagonist, by accident an…

M

M-onna (submissive female, Japanese context)

M-onna is the Japanese term for a female in the submissive role of an SM relationship. Anc…

M-otoko (submissive male, Japanese context)

M-otoko is the Japanese term for a male in the submissive role of an SM relationship. Oper…

M-Seikan (Female-Led Pleasure Service)

M-seikan is a Japanese sex-service category where female staff give male customers soft SM…

M-spread (M-shaped legs pose)

Acts & Techniques

M-spread is the bent-knee leg-apart pose forming an M shape, central to Japanese gravure p…

Machi-Nanpa (Street Pickup AV)

Machi-nanpa is the Japanese AV planning genre built on the staged street pickup of suppose…

Magic Mirror Gou

Magic Mirror Gou is a Soft On Demand AV series (1996–) built around a converted RV with a …

Mahou-mono (Magic-Themed Genre)

Mahou-mono is the adult genre placing magic and the supernatural at the core of its worldb…

Maid (kink and costume)

Maid names, in Japanese subculture, a costume-and-roleplay archetype based on Victorian ho…

Majime-Mono (Earnest Genre)

Majime-mono is the Japanese trade label for adult works built on emotional depth and devel…

Majo Fetish (Witch Fetish)

Majo fetish is attraction to witch and magical-girl characters, ranging from the classical…

Makou-kikuichimonji position

Acts & Techniques

Makou-kikuichimonji is a face-to-face spread-leg forty-eight-hands position, the legs open…

Male menopause (LOH syndrome)

Body & Sensation

Male menopause (LOH syndrome) is age-related testosterone decline causing reduced libido, …

Manga Regulation Controversy

The manga regulation controversy is the recurring debate over sexual and violent content i…

Married-woman scenario (J-AV genre)

Married-woman scenario is the Japanese AV category centred on married female protagonists …

Maruyama Pleasure Quarter

History & Culture

The Maruyama quarter was the licensed pleasure quarter of Edo-period Nagasaki. Courtesans …

Masochism

Masochism binds sexual pleasure to pain, humiliation, and being dominated. Coined in 1886 …

Massage Play

Massage play is a staging mode disguising a practitioner-client relation as sexual contact…

Matsubakuzushi (V-position)

Acts & Techniques

Matsubakuzushi is the Japanese sex position with one leg raised and the receiver half-rota…

Megane-joshi (bespectacled adult woman)

Megane-joshi is the Japanese kink for bespectacled adult women in professional contexts: o…

Meganekko (glasses-girl)

Meganekko is the Japanese moe-attribute category for spectacled female characters. It comb…

Meiji-Period Erotic Literature

History & Culture

Meiji-period erotic literature is the sensual literary expression of Japan's Meiji era (18…

Meiku Fetish (Makeup Fetish)

Meiku fetish is attraction to applying or fixing makeup, or to the made-up face itself. It…

Mekakushi (blindfold play)

Mekakushi covers consensual blindfold play within BDSM: visual deprivation sharpens the ot…

Melonbooks

Melonbooks is a doujinshi specialty-store chain founded in 1998 in Sapporo. With directly …

Men's Esthe

Men's esthe is the Japanese category in which a female therapist gives a male customer oil…

Menhera (Emotionally Unstable Archetype)

Menhera is slang for an emotionally unstable, dependent, self-harming personality, or a ch…

Mensou-i (face-to-face position)

Acts & Techniques

Mensou-i is the classical Japanese term for face-to-face intercourse, frequent in Edo erot…

Mesu-gao (female-aroused face)

Mesu-gao is the broader Japanese eromanga facial-expression category for the public-ration…

Mesu-ochi (Falling into Female Submission)

Mesu-ochi is a narrative type in which a character, through sexual submission, redefines t…

Mesuiki (Female-Style Orgasm)

Acts & Techniques

Mesuiki is Japanese slang for a man reaching orgasm without ejaculation, through a wave-li…

Mesuiki (Glans-Focused)

Mesuiki kitō-zeme is a Japanese kink in which a man reaches a non-ejaculatory orgasm — mes…

Miko (Shrine Maiden)

Miko are the female attendants at Shintō shrines, traditionally wearing a white robe and r…

Mimi Fetish (Ear Fetish)

Mimi fetish is attraction to the shape, skin, and sound-relation of the ear. It blends vis…

Mind Break (Hentai Tag and Narrative Type)

Mind break is an English hentai tag for stories in which overwhelming pleasure dissolves a…

Mind Control (Brainwashing Genre)

Mind control (sennou) is the fictional adult-media genre depicting step-by-step rewriting …

Mistress Referral Service (Aijin Haken)

Aijin haken is a Japanese service in which an agency introduces affluent men to a long-ter…

Mitsuyu (Excessive Wetness)

Mitsuyu is the eromanga and doujinshi convention of drawing exaggerated volumes of arousal…

Mole Fetish (Hokuro)

Mole fetish is the Japanese fan-culture preference for moles on the skin as a sexual or ae…

Momiji-dachi (Maple Leaf Standing Position)

Acts & Techniques

Momiji-dachi is an Edo position from the Forty-Eight Hands. The receiving partner lies sup…

Mongiri (gate-cutting position)

Acts & Techniques

Mongiri is a forty-eight hands position with the receiving partner in a deep prone-quadrup…

Monolid kink (hitoe-mabuta)

Hitoe-mabuta is the Japanese category for the monolid or hooded-eye kink. Anchored on the …

Mons pubis (chikyu)

Body & Sensation

Chikyu (mons pubis) is the fat-padded prominence covering the pubic symphysis. Site of pub…

Monthly subscription sales (gekkaku-uri)

Gekkaku-uri grants access to all of a creator's content for a recurring monthly fee. The c…

Mucchiri (Soft-Voluptuous Body)

Mucchiri is the taste for a body neither too slim nor truly heavy: a moderate volume with …

Munei (male chest / pectoral region)

Body & Sensation

Munei names the developed male chest centred on the pectoralis major. The depth and shape …

Musei (nocturnal emission)

Acts & Techniques

Musei names nocturnal emission: spontaneous ejaculation during sleep, predominantly in pub…

Museum of Sexual Culture

History & Culture

A museum of sexual culture collects and exhibits historical and folkloric materials on sex…

MyFans

MyFans is a Japan-based fan-club content-sales platform by Tokuneko Inc., letting creators…

N

Nakadashi

Acts & Techniques

Nakadashi is the Japanese AV-industry term for ejaculation inside the vagina, parallel to …

Nakaore (Loss of Erection Mid-Intercourse)

Acts & Techniques

Nakaore is the Japanese term for losing an erection partway through intercourse. It is the…

Naked apron (hadaka apron)

Naked apron (hadaka apron) is the costume aesthetic of a woman wearing nothing but an apro…

Namahame (condomless / raw)

Acts & Techniques

Namahame is the Japanese industry slang for condomless intercourse, literally raw-insertio…

Namamono (Real-Person Fanwork)

Namamono is the colloquial term for fanwork based on real people such as celebrities and i…

Namida-zeme (tear play)

Namida-zeme is the Japanese SM sub-genre and consensual practice that takes the eliciting …

Nampa (Street Pickup)

Nampa is calling out to a stranger of the opposite sex in public to develop a relationship…

Nanpa-Mono (Pickup Genre)

Nanpa-mono is the Japanese AV genre using the setup of approaching ordinary pedestrians an…

Naoki Yamamoto

Naoki Yamamoto (born 1960) is a Japanese seinen manga artist whose work BLUE was designate…

Nape (unaji)

Body & Sensation

Unaji is the Japanese term for the nape, the posterior surface of the neck. As a rare body…

Narutomaki (The Whirlpool Position)

Acts & Techniques

Narutomaki is one of the Edo Forty-Eight Hands: a motion-type position in which both partn…

Navel fetish

Navel fetish is persistent sexual interest in the navel as a body-fetish category. The kin…

Ne-back (prone-position rear-entry)

Ne-back is the Japanese AV vocabulary for prone-position rear-entry: the receiving partner…

Ne-ekiben (Supine Ekiben Position)

Acts & Techniques

Ne-ekiben is the supine variant of the ekiben carry: the inserting partner lies back and l…

Negao kink (sleeping face fetish)

Negao kink names attraction to a partner's sleeping face: the unguarded expression that in…

Neko (Bottom Role)

Neko is Japanese slang for the receptive, feminine-coded partner in same-sex relationships…

Nemurihime-play (Sleeping Beauty roleplay)

Nemurihime-play is pre-negotiated consensual roleplay in which one partner performs sleep.…

Netoge-Mono (Online-Game Romance)

Netoge-mono is the situation genre for adult works where a relationship begins from an onl…

Netorare (NTR)

Netorare (NTR, 寝取られ) is the Japanese narrative genre in which an exclusive partner is take…

Netorase (consensual cuckolding)

Netorase names the consensual-active variant of the netorare narrative: one partner arrang…

Netori (perspective-shifted netorare)

Netori is the Japanese narrative-perspective category in which fictional infidelity is tol…

Newhalf

Newhalf is a 1980s Japanese-English coinage for a person registered male at birth who live…

Newhalf Health (Transgender Escort Establishment)

Newhalf health is a Japanese store-based and dispatch-type sex business in which transgend…

Newhalf Pub

Newhalf pub is the Japanese hospitality category in which newhalf performers provide servi…

Newlywed Theme (Shinkon)

The newlywed theme places a couple just after the wedding at the centre, a pure-love subca…

Nijisousaku (Derivative Fanwork)

Nijisousaku is the umbrella term for derivative creation borrowing the settings and charac…

Nikkatsu Roman Porno

Roman Porno is the adult theatrical film series Nikkatsu produced from 1971 to 1988. Cover…

Ningyo-moe (Mermaid Attraction)

Ningyo-moe is the attraction to mermaid-type characters with a human upper body and a fish…

Ningyou-play (doll roleplay)

Ningyou-play is the consensual roleplay in which one partner performs the role of a doll: …

Ninpu (pregnant women, body category)

Body & Sensation

Ninpu names the pregnant woman in Japanese: neutral in medical use and a recognised body-a…

Ninshin (pregnancy kink / impregnation narrative)

Ninshin covers the Japanese kink configuration around pregnancy, splitting into haramase (…

Nioi-fetish (smell fetish)

Nioi-fetish names attraction to body odours, natural scents, and scent-impregnated objects…

Nipple orgasm (chikubi-iki)

Acts & Techniques

Nipple orgasm is the sexual-response phenomenon of climax through nipple stimulation alone…

Nipple-clamp (kink and device)

Acts & Techniques

Nipple-clamp names the BDSM device class that applies clip pressure to the nipple, produci…

NN/NS

NN/NS is sex-industry slang, circulating chiefly around soapland, for condom-free intercou…

Nobura (braless)

Nobura is the Japanese aesthetic for the braless state under clothing. The shape and movem…

Nodo (throat)

Body & Sensation

Nodo names the throat: the pharyngeal-laryngeal region from the back of the mouth to the v…

Non-Consensual Sexual Intercourse Offence (2023)

The non-consensual sexual intercourse offence is the sex-crime category under amended Pena…

Nonke (Straight Man)

Nonke is Japanese gay-culture slang for a heterosexual man. From a contraction meaning 'no…

Nopan (going commando, Japanese sense)

Nopan is the Japanese term for not wearing underwear. Used in private erotic contexts and …

Nukige

Nukige is the Japanese eroge sub-genre that prioritises explicit erotic content over narra…

Nukisashi (In-and-Out Motion)

Acts & Techniques

Nukisashi is the Japanese colloquial term for the in-and-out thrusting motion during inter…

Nun (Shudoujo / Sister)

The nun (Japanese shudoujo, called sister) is a vowed woman of a Christian order. This cov…

Nun (Sister) Fetish

Sister moe (nun fetish) is the Japanese subcultural taste for nun characters in habit and …

Nurse

Nurse names the healthcare worker and, in Japanese subculture, a roleplay taste built on t…

Nyoudou-zeme (Urethral Play / Sounding)

Acts & Techniques

Nyoudou-zeme is urethral play: inserting thin instruments into the urethra. A specialised …

Nyuurin (Areola)

Body & Sensation

Nyuurin is the areola: the circular pigmented skin region surrounding the nipple at the br…

O

Offpako

Offpako is Japanese internet slang for a sexual encounter arising from an offline meetup o…

Ohaguro (Tooth Blackening)

History & Culture

Ohaguro is the traditional Japanese custom of dyeing the teeth black: a Heian aristocratic…

Oho-goe (Oho Voice)

Oho-goe (oho voice) is a voice-acting style in which a refined female character, immersed …

Oiran

Oiran was the highest-ranking courtesan of the Edo-period Yoshiwara quarter. This article …

Ojiichan (Older-Man Genre)

Ojiichan is a Japanese endearment for an elderly man, and in adult media a genre sign for …

Ojousama Character (Wealthy Heiress Archetype)

The ojousama character is a heiress archetype with polite speech, refined manners, and a g…

Okabasho (Unlicensed Quarters)

History & Culture

Okabasho were the unauthorised prostitution districts of Edo outside the licensed Yoshiwar…

OL (Office Lady)

OL (office lady) is a Japanese-English term for a clerical female office worker, settled i…

Older-woman preference (toshiue)

Toshiue-kei is the preference for female characters set older than the protagonist. It cov…

Omorashi (incontinence kink in fictional context)

Acts & Techniques

Omorashi is the fictional-or-consensual-adult-only kink centred on the loss of urinary con…

Onahole

Onahole is a Japanese-English coinage (onanie + hole) for male masturbators with sculpted …

Onakura

Onakura (onanie club) is the Japanese sex-industry form in which a male customer masturbat…

Onanie (Masturbation)

Acts & Techniques

Onanie is the German-derived Japanese term for masturbation, taken from the biblical Onan.…

Onasapo

Onasapo is the Japanese audio sub-genre in which a voice performer guides the listener's m…

One-Piece Swimsuit

One-piece swimsuit fetishism is the taste for the single-piece women's swimsuit and the fi…

Onee-chan Attribute

Onee-chan attribute is a relationship taste centred on addressing a woman as 'onee-chan' (…

Onee-san Attribute

Onee-san attribute is a character type for a woman a few years older, whose core appeal is…

Onii-chan Attribute

Onii-chan attribute is a relationship taste centred on addressing a man as 'onii-chan' (bi…

OnlyFans

OnlyFans is the British subscription content platform that became the leading internationa…

Onsen Play (Hot-Spring Scenarios)

Onsen play is the Japanese adult-video situation genre staged at hot-spring inns and open-…

Oppai (Breasts)

Body & Sensation

Oppai is the everyday Japanese word for breasts: between the clinical nyubo and trade-coin…

Orgasm disorder

Body & Sensation

Orgasm disorder is the persistent difficulty or inability to reach orgasm despite adequate…

Oshidori no Mutsumi (Mandarin Duck Embrace)

Acts & Techniques

Oshidori no Mutsumi is a face-to-face seated variant in the Forty-Eight Hands: the partner…

Oshikuruma (Wheelbarrow Position)

Acts & Techniques

Oshikuruma is an Edo Forty-Eight Hands position: the receiving partner plants both hands o…

Otaku

History & Culture

Otaku denotes people deeply devoted to anime, manga, and games. Coined as a slur in 1983 a…

Otoko no Shiofuki (Male Squirting)

Acts & Techniques

Otoko no shiofuki, male squirting, is the release of fluid distinct from semen through the…

Otokonoko

Body & Sensation

Otokonoko is a 2000s Japanese subcultural term for someone with a male body who presents f…

Otome game

Otome game is the Japanese genre of female-oriented romance simulations, with a female lea…

Otouto-kei (Younger-Brother Type)

Otouto-kei is the taste for a male character type marked by being younger, doting, and rec…

Outdoor Genre (Yagai-mono)

The outdoor genre stages sexual activity in open-air locations such as forests, parks and …

Outdoor Sex

Acts & Techniques

Outdoor sex covers consensual activity in unroofed spaces: beaches, forests, parks, hidden…

Outing

Outing is disclosing a person's sexual orientation or gender identity to a third party wit…

Ovary

Body & Sensation

The ovary is the paired female gonad in the pelvic cavity. It produces and ovulates eggs a…

Oyakodon (Mother-Daughter Threesome Trope)

Oyakodon, named after the chicken-and-egg rice bowl, is Japanese slang and an adult-fictio…

P

Paid Membership

A model in which fans pay a monthly fee to a creator-run fan club for exclusive content. I…

Paipan (Shaved / Hairless Pubic Area)

Body & Sensation

Paipan is Japanese slang for a hairless pubic area on a fully adult body. Covers the adult…

Paizuri

Acts & Techniques

Paizuri is the Japanese AV-industry term for stimulating the penis with the breasts. Built…

Pale Skin Fetish

Pale skin fetish is a strong sexual or aesthetic attraction to white, translucent skin: it…

Panchira

Panchira is the Japanese term for a brief glimpse of underwear from beneath a skirt. A sto…

Pansexual

Pansexual describes attraction independent of gender. The article covers the term's roots …

Pansuto (Pantyhose)

Pansuto is the Japanese contraction of panty-stocking. Atsugi launched the domestic versio…

Papa-Katsu (Sugar Dating)

Papa-katsu is the contemporary Japanese form in which a woman keeps a continuing dating re…

Paraphilia

Paraphilia is the contemporary clinical term for atypical sexual interest. DSM-5 distingui…

Parasocial streaming culture (gachikoi haishin)

Gachikoi streaming is the Japanese parasocial-romance audience around live-streaming platf…

Partner Swapping (Swinging)

Swapping is the adult-media category in which couples exchange partners for sexual activit…

Patreon

Patreon is a creator monthly-support platform founded in the United States in 2013. The en…

Pay-Per-View (Single Purchase)

Tanpatsu-uri is the model in which video, photo sets, or audio are sold for a one-time pur…

Peep Show

A peep show is a Japanese sex-industry form in which a customer views a woman through a sm…

Penetration (Sounyuu)

Acts & Techniques

Sounyuu is the Japanese term for sexual penetration: the act of entering one body into ano…

Penis

Body & Sensation

Penis covers the anatomy of the male external genital organ, the evidence on size variatio…

Penis (inkei)

Body & Sensation

Inkei is the formal Japanese anatomical name for the penis. The organ comprises the corpor…

Penis Band (Cock Ring)

Acts & Techniques

A penis band (cock ring) is a ring worn at the base of the penis or around the penis and s…

Perineum (eiin)

Body & Sensation

Eiin is the Japanese term for perineum: the diamond-shaped soft-tissue region between exte…

Personal fan club

A personal fan club is a membership a creator runs under their own name, not through an ag…

Pet play

Pet play is the BDSM practice in which one consenting adult plays an animal role and the o…

Petite

Body & Sensation

Petite denotes a body type smaller in height and build than average. In adult work the pet…

Pheromones (feromon)

Body & Sensation

Pheromones are chemical signal substances influencing conspecific physiology or behaviour.…

Philippine Pub

A Philippine pub is a Japanese hostess-bar type staffed mainly by Filipina women. It sprea…

Phimosis (houkei)

Body & Sensation

Phimosis is the medical term for inability of foreskin retraction over the glans. Sub-clas…

Photobook (Shashinshu)

A shashinshu is a bound book of photographs built around one subject, covering postwar Jap…

Photographing of Sexual Conduct Offence (2023)

The photographing of sexual conduct offence is the crime category under Japan's 2023 voyeu…

Piercing Fetish

A piercing fetish is the arousal at piercings worn on the body, especially nipple and geni…

Pink Film

History & Culture

Pink film is the genre of low-budget independent adult cinema that developed in Japan from…

Pinsalo (Pink Salon)

Pinsalo (pink salon) is a Japanese sex business providing oral-line services inside a stor…

Piston motion (thrusting)

Acts & Techniques

Piston motion is the Japanese vocabulary for the reciprocating thrust of intercourse, usin…

Pixiv and Adult Doujin

The adult-content culture on Pixiv, the Japanese illustration platform. Through R-18 tags,…

pixivFANBOX

pixivFANBOX is the monthly creator-support platform pixiv launched in 2018. This entry cov…

Plain-Appearance Preference (Busu-kei)

Plain-appearance preference is the Japanese aesthetic preference for partners outside comm…

Pocchari (Chubby / Plump)

Body & Sensation

Pocchari is the Japanese onomatopoeic adjective for a softly fuller body, used affirmative…

Police Officer Fetish (Keikan Fetish)

A police-officer fetish is strong sexual attraction to the uniformed officer, especially t…

Polyamory

Polyamory is the practice of multiple simultaneous romantic relationships with informed co…

Ponytail (kink)

Ponytail is the hairstyle of gathered hair tied at the back or top of the head, and the co…

Pornography Addiction

Pornography addiction names a state where compulsive pornography use impairs daily life, r…

Portio (cervix)

Body & Sensation

Portio is the popular Japanese name for the portio vaginalis, the vaginal portion of the c…

Postwar Sexual Culture

History & Culture

Postwar sexual culture is the change in sexual custom, media, and law in Japan from the 19…

Praise-Kink Moe (Home-Jozu)

Praise-kink moe is the Japanese preference for characters skilled at giving compliments, i…

Premature Ejaculation (Souro)

Acts & Techniques

Premature ejaculation is a recognised clinical sexual dysfunction. The ISSM 2008 definitio…

Priest/Nun Theme (Shisei-mono)

The priest/nun theme is an adult-fiction genre placing Christian clergy roles at the centr…

Princess Character (Hime-Kyara)

Princess character is the Japanese moe-attribute category for royal maidens in fantasy or …

Private Booth Video (Koshitsu Video)

The private booth video shop rents lockable rooms by the hour for solo viewing of adult vi…

Private-tutor genre (J-adult fiction)

The private-tutor genre is a Japanese adult-fiction situation type with a fictional adult …

Prone position (fuse-i)

Acts & Techniques

Fuse-i (prone position) is the class in which the receiving partner lies face-down and the…

Pubic hair (inmou)

Body & Sensation

Inmou is the Japanese formal term for pubic hair: terminal hair around the pubic region fr…

Public Indecency (Penal Code Article 174)

Public indecency under Penal Code Article 174 punishes performing an obscene act in public…

Pull-out (Sotodashi / Withdrawal Method)

Acts & Techniques

Sotodashi is the Japanese colloquial term for the withdrawal method (coitus interruptus). …

Pure-love genre (junai-kei)

Junai-kei is the Japanese adult-fiction genre fusing consensual romance with sexual depict…

Q

Queer

Queer is a former English slur reclaimed in the late 1980s as a broad LGBTQ+ identity and …

R

Reading Fetish (Dokusho Fechi)

Reading fetish is the Japanese term for sexual or aesthetic attraction to the sight of a p…

Receptionist Genre (Uketsuke)

The receptionist genre is an AV situation type centred on the female reception staff of a …

Refined-restraint eros (tashinami)

Tashinami-kei is the kink for the quiet sensuality of a composed adult woman. It desires t…

Refre (reflexology shop)

Refre is a Japanese name for a trade that advertises reflexology but mixes conversation, c…

Renzoku-ikasare (continuous forced-orgasm narrative)

Renzoku-ikasare is the Japanese AV-and-eromanga convention of continuous forced-orgasm sce…

Retirement Work (AV Final Appearance)

A retirement work is the final film an AV actress releases on leaving the industry. It car…

Revenge Porn / Image-Based Sexual Abuse

Image-based sexual abuse, often called revenge porn, is the non-consensual distribution of…

Reverse cowgirl (haimen-kijōi)

Acts & Techniques

Haimen-kijōi is the Japanese name for reverse cowgirl, the cowgirl variant in which the pa…

Reverse seated position (haimen-zai)

Acts & Techniques

Haimen-zai is the Japanese position-name for reverse seated position. The partner above si…

Reverse-rape roleplay audio (fictional female-dominant doujin voice)

Reverse-rape audio is the Japanese doujin-voice category for fictional roleplay where a fe…

Rezu (Lesbian)

Lesbian denotes a woman whose sexual and romantic orientation is toward women; in Japan th…

Ritsui (Standing Position, general)

Acts & Techniques

Ritsui is the umbrella term for intercourse positions performed while both partners stand.…

Ritsui-taimen-i (Standing Face-to-Face Position)

Acts & Techniques

Ritsui-taimen-i is the standing face-to-face position: both partners stand and couple faci…

Role Play (Sexual Roleplay)

Sexual role play is consensual character or scenario performance by adult partners. Covers…

Rolled-sleeves fetish (udemakuri)

Udemakuri fetish is the pull felt toward rolling up sleeves, or toward the rolled-sleeve f…

Rookie Office Worker (Shinjin OL)

The rookie office-worker genre is an AV situation type placing a newly hired female employ…

Rope Bondage Fundamentals (Shibari Basics)

Foundational shibari knot and safety knowledge: takate-kote, kikkou, chou-shibari, rope se…

Roshutsu (Exhibitionism)

Roshutsu is the taste linking undressing and exposure to arousal, and a fictional genre na…

Rotor

Rotor is the Japanese industry term for a small egg-shaped or capsule vibrator. Establishe…

Rubber Fetish

Rubber fetish covers heavyweight rubber clothing as erotic interest. Originating in 20th-c…

Rule 34 (If It Exists, There Is Porn of It)

History & Culture

Rule 34 is the internet maxim that if something exists, there is porn of it. Traced to a 2…

Ryona

Ryona is the Japanese subculture genre depicting fictional female characters taking damage…

Ryoujoku-Mono (Non-Consensual Genre)

Ryoujoku-mono is a fictional AV and doujin genre using non-consensual acts as a device, wi…

Ryouri-Mono (Cooking-Setting Genre)

Ryouri-mono is the collective term for adult works set in the kitchen and at the table, dr…

Ryūsei (The Meteor)

Acts & Techniques

Ryūsei is a motion-name among the Edo Forty-Eight Hands. It names the phase of rapid thrus…

S

Sabasaba Moe (Cool-Girl Archetype)

Sabasaba moe is attraction to women with a frank, unclingy temperament: the ease of a male…

Sacrificial-victim genre (J-hentai)

The sacrificial-victim genre is a Japanese adult-fantasy type depicting a fictional human …

Sagging breasts (tarechi-chichi)

Body & Sensation

Tarechi-chichi is the Japanese colloquial term for breasts descended under gravity through…

Sai-zecchō (Multiple Orgasm)

Acts & Techniques

Sai-zecchō is reaching orgasm again immediately after a first one. The Japanese rendering …

Saikai-Mono (Reunion Genre)

Saikai-mono is the collective term for adult works taking a reunion with a parted lover as…

Sailor Seifuku

Sailor seifuku is the Japanese girls'-school uniform descended from British Royal Navy sai…

Saimin (Hypnosis Genre)

Saimin is the Japanese fictional hypnosis genre in eromanga, eroge, and audio. Framed as a…

Saimin-Mono (Hypnosis Genre)

Saimin-mono is a fictional AV and doujin genre premised on controlling a target through hy…

Sakunyuu (milking)

Acts & Techniques

Sakunyuu is the Japanese eromanga and AV genre of breast-milk extraction as fictional or c…

Saliva (daeki)

Body & Sensation

Daeki is the Japanese term for saliva, the clear bodily fluid from salivary glands. Functi…

Sanpakugan Moe (Three-White-Eye)

Sanpakugan moe is attraction to the eye shape with a small iris and white on three sides, …

Sasabune (bamboo-leaf boat position)

Acts & Techniques

Sasabune is a forty-eight hands position where two bodies lie on the side at a shared angl…

Scar / wound fetish (kizu)

Kizu-fetish is the aesthetic interest in scars and wound-marks on fictional characters. Su…

School Swimsuit (Sukumizu) Fetish

Sukumizu is the Japanese cosplay-and-fetish category for the school-issue swimsuit, depict…

School-Nurse-Office Scenario (Hokenshitsu)

School-nurse-office scenario is a Japanese adult-content situation set in the school infir…

School-Trip Genre (Shuugakuryokou-mono)

The school-trip genre is adult fiction set during overnight school events, with all charac…

Secretary scenario (J-AV genre)

Secretary scenario is the Japanese AV configuration centred on the personal secretary of a…

See-Through Fetish (Sukesuke Fetish)

See-through fetish is attraction to sheer material, thin fabric, and clothing made translu…

Seifuku (Uniform Costume)

Seifuku is Japanese for uniform. As an adult fetish category it covers adult-performer rol…

Seijoui (Missionary Position)

Acts & Techniques

Seijoui is the Japanese term for the missionary position: the receiving partner supine, th…

Seijun-kei (Pure / Innocent Archetype)

Seijun-kei is a female character type built from signs of innocence: a modest personality,…

Seikan Massage (Sensual Massage)

Seikan massage (sensual massage) is the general term for massage businesses whose main aim…

Seikotsu-in Mono (Osteopathy / Massage Clinic Genre)

Seikotsu-in mono is the term for adult works set in osteopathy and massage clinics. A situ…

Seikou (Sexual Intercourse)

Acts & Techniques

Seikou is the Japanese formal term for sexual intercourse: a sexual act involving genital …

Seitenkan (Gender Transformation Genre)

Seitenkan is the fictional genre in which a protagonist's sex is physically swapped, centr…

Sekai-kei Adult Content

Sekai-kei adult content is adult fiction whose structure ties the protagonist-heroine bond…

Selfie Erotica

Selfie erotica is sexual images and video a person shoots of themselves with a smartphone.…

Seminal vesicle

Body & Sensation

Seminal vesicle is a paired secretory gland behind the bladder producing most of the volum…

Senpai-Kohai Dynamic

The senpai-kohai dynamic is a relationship kink that turns the vertical hierarchy of clubs…

Seppun (Kissing)

Acts & Techniques

Seppun is the Japanese formal term for kissing. Covers the physiology, the anthropological…

Setto-zai (Set Stain Remover)

Setto-zai is the industry nickname for the commercial stain remover used on AV sets to cle…

Sex Doll Brothel (Doll Fuzoku)

Doll fuzoku is a trade offering private-room sessions with a silicone love doll rather tha…

Sex Education (Japan)

Sex education is the systematic teaching of knowledge, ethics, and human rights around sex…

Sex hormones

Body & Sensation

Sex hormones are the gonadal steroid hormones: testosterone, estrogen, progesterone. They …

Sex Symbol

History & Culture

A sex symbol is a figure recognised in twentieth-century mass media as an embodiment of se…

Sex Therapy

Sex therapy is professional psychological and medical help for sexual dysfunction and anxi…

Sex Workers' Rights

Sex workers' rights is the movement and concept holding that sex workers should receive th…

Sexual Addiction (Sei Izon)

Sexual addiction is a state in which pursuit of sexual behaviour becomes hard to control a…

Sexual aversion disorder

Body & Sensation

Sexual aversion disorder is persistent aversion to and avoidance of sexual contact. Often …

Sexual Consent

Sexual consent is the precondition for a sexual act to be legally and ethically justified:…

Sexual Culture of the 2000s

History & Culture

The sexual culture of the 2000s names the era when sexual expression's circulation changed…

Sexual desire and aging

Body & Sensation

With age, testosterone and oestrogen decline and alter sexual desire and function. Yet sex…

Sexual Dimorphism Fetish (Dansa Fechi)

Dansa fetish is the Japanese umbrella term for sexual attraction to physical sex differenc…

Sexual Harassment (Japan)

Sexual harassment is sexual conduct in the workplace that harms a worker's conditions or e…

Sexual Minority

Sexual minority is the umbrella for people whose sexual orientation, gender identity, or s…

Sexual Revolution

History & Culture

The sexual revolution was the shift in sexual norms across the West in the 1960s and 1970s…

Sexual satisfaction

Body & Sensation

Sexual satisfaction is the subjective evaluation of one's sexual life, a basic concept in …

Sexual self-disclosure

Body & Sensation

Sexual self-disclosure is verbally communicating one's sexual preferences, experiences, an…

Sexuality in Ancient Greece

History & Culture

Sexuality in ancient Greece covers sex in the Hellenic world from the 8th to 4th century B…

Sexuality in Ancient Rome

History & Culture

Sexuality in ancient Rome covers the sexual practices and norms from the Republic through …

Sexuality in Buddhism and Shinto

History & Culture

Sexuality in Buddhism and Shinto covers how Japan's two religions treated sex: Buddhist pr…

Sexuality in Heian Japan

History & Culture

Sexuality in Heian Japan covers sex from 794 to 1185: polygyny on a visiting-marriage base…

Sexuality in Jomon and Yayoi Japan

History & Culture

Sexuality in Jomon and Yayoi Japan covers the artefacts and inferred customs around sex in…

Sexuality in Meiji-Era Japan

History & Culture

Sexuality in Meiji-era Japan covers sexual commerce, expression, and marriage from 1868 to…

Sexuality in the Kojiki

History & Culture

Sexuality in the Kojiki is the body of statements on sex, the body, and procreation in Jap…

Sexuality in the Sengoku Period

History & Culture

Sexuality in the Sengoku period covers warrior society from the Onin War (1467) to Sekigah…

Sexuality Under Allied Occupation in Japan (1945–1952)

History & Culture

Sexuality under the Allied occupation of Japan (1945-1952) covers the sex work, venereal-d…

Shallow teasing bounce (jirashi-jouge)

Acts & Techniques

Jirashi-jouge is a teasing technique of repeating shallow vertical strokes while limiting …

Shame-focused voyeurism (jitto-miru / shūchi-shikan)

Shūchi-shikan is the Japanese category for the unwilling-gaze kink. Distinct from exhibiti…

Shijuhatte (The Forty-Eight Hands)

History & Culture

Shijuhatte is the Edo-period system of forty-eight-odd named sexual positions and techniqu…

Shimabara

History & Culture

Shimabara was the shogunate-licensed pleasure quarter of Kyoto. Relocated in 1641, it was …

Shimapan

Shimapan is the Japanese fan-cultural term for striped underwear: white field with two or …

Shinjū (Lovers' Double Suicide)

History & Culture

Shinjū is the act of a man and woman ending their lives together by consent. In early-mode…

Shiropan (White Panties)

Shiropan is the taste for, and representational sign of, plain white panties: its tie to i…

Shirouto (Amateur Genre, Japanese AV)

Shirouto (amateur) is a Japanese AV genre thematising ordinary women who are not professio…

Shishō (Unlicensed Prostitution)

History & Culture

Shishō means women who sold sex without official licence, and the trade itself. From the E…

Shitabakushi (tongue-out fetish)

Shitabakushi is the Japanese kink-aesthetic of tongue-out facial expression. Distinct from…

Shokushu (Tentacle)

Shokushu is the Japanese word for tentacle and a hentai genre in which non-human creatures…

Short hair (kink)

Short hair is the female hairstyle cut to ear-level or above, and the corresponding fetish…

Short Stature (Petite)

Body & Sensation

Short stature (petite) is a height markedly below average and the taste oriented toward it…

Shorts Fetish

Shorts fetish is attraction to women in short-hemmed pants that expose the thigh: denim sh…

Shoulder (kata)

Body & Sensation

Shoulder (kata) is the upper-body boundary between neck and arms. Japanese aesthetic disti…

Shukan (POV Filming)

Shukan is an AV filming technique placing the camera near the male performer's viewpoint. …

Shunga

Shunga is the Edo-period genre of erotic ukiyo-e prints. A major branch produced by almost…

Shungiku Uchida

Shungiku Uchida (born 1959) is a Japanese manga artist, novelist, actor, and singer who wo…

Shussan-mono (Childbirth-Themed Genre)

Shussan-mono is an adult-work genre depicting childbirth itself as the climax, compressing…

Simple Possession (Child Pornography)

Simple possession means holding child sexual abuse material privately without intent to di…

Simultaneous orgasm

Acts & Techniques

Simultaneous orgasm is the temporal-proximate occurrence of both partners' climaxes. Ideal…

Simultaneous penetration (douji-sounyu)

Acts & Techniques

Simultaneous penetration is the Japanese industry term for multiple insertions into one re…

Single-Title Actress

A single-title actress is the middle of the AV industry's three contract types, taking lea…

Sisters Threesome (Ane-Imouto Don)

Ane-imouto-don is the Japanese adult-manga and doujinshi narrative type in which one man e…

Sitting Position (Seated Coitus)

Acts & Techniques

The sitting position is a class of coital postures in which both partners sit. The face-to…

Situation Voice (Shichu-boe)

Situation voice is the term for audio works that proceed as a pseudo-dialogue between perf…

Sixty-Nine (69)

Acts & Techniques

Sixty-nine (soixante-neuf) is a reciprocal oral position in which two people lie head-to-t…

Sleep and sexual desire

Body & Sensation

Sleep is a physiological foundation of sexual desire and function. Sleep loss sharply lowe…

Slender (Body Type)

Body & Sensation

Slender is the Japanese body-type category for a slim, slender frame. Standing alongside g…

Slice-of-Life Erotica

Slice-of-life erotica depicts sexuality as an extension of everyday domestic life among lo…

Slow Sex

Acts & Techniques

Slow sex is an approach to sex that displaces orgasm as the goal and centres breath, touch…

SM (Japanese SM Culture)

SM is the Japanese postwar tradition of sadomasochistic practice. Distinct from but in dia…

SM Club

An SM club is a Japanese sex-industry form specialising in SM and BDSM play. This entry co…

SM Collar

The SM collar is a neck device that makes a dominant-submissive relationship visible in SM…

SM Salon

An SM salon is a Japanese sex-industry form offering bondage and dominance-submission play…

Snack-Bar Culture

Snack-bar culture is the trade in which a 'mama' serves regulars drinks and conversation a…

Soapland

Soapland is the Japanese sex-industry category of private-room bath establishments. Origin…

SOD (Soft On Demand)

SOD is the group name for the AV studio Soft On Demand, founded in 1995, and its affiliate…

SOGI Harassment

SOGI harassment is discriminatory conduct based on sexual orientation and gender identity.…

Sokui (Side Position)

Acts & Techniques

Sokui is the umbrella term for intercourse positions in which both partners lie on their s…

Solo vs. Project AV Classification

The solo-versus-project classification divides AV works by the lead actress's contract typ…

Somabito (Woodcutter Position)

Acts & Techniques

Somabito is a standing variant in the Edo Forty-Eight Hands: the inserting partner carries…

Sora Aoi

Sora Aoi (born 1983) is a former Japanese AV actress who became a cultural phenomenon acro…

Spanking

Spanking is the BDSM impact-play category of striking the buttocks with the palm or implem…

Sports Bra

The sports bra is a cupless compression garment that limits breast movement in exercise, a…

Sports Trainer Theme (J-AV)

The sports trainer theme covers adult works built on the relation between a physical instr…

Sports-Setting Adult Content

Sports-setting adult content is adult fiction built on sports and club settings, combining…

Squirting (Shiofuki)

Acts & Techniques

Shiofuki is the Japanese term for fluid expulsion through the female urethra at climax, an…

Standing Position (Tachii)

Acts & Techniques

Tachii, the standing position, is the umbrella term for coitus with one or both partners u…

Step-Parent Theme (Giri no Oya-kei)

Giri no oya-kei is the Japanese adult-fiction category for step-parent and in-law relation…

Stocking Fetish

Stocking fetish is the costume-fetish category centred on women's hosiery: the visual tran…

Stress and sexual function

Body & Sensation

Chronic stress raises cortisol and suppresses testosterone, causing reduced desire and ere…

Strip Show (Japanese Striptease)

History & Culture

Strip show is the postwar Japanese live-stage entertainment genre of staged disrobement. O…

Sukatoro (scatology kink)

Sukatoro is the Japanese category for scatological-themed adult content. Operates almost e…

Sumata (Intercrural Sex)

Acts & Techniques

Sumata is the non-penetrative act of rubbing the male genitals between a woman's thighs or…

Sundome (Edging / Orgasm Denial)

Acts & Techniques

Sundome is the Japanese term for stopping stimulation just before orgasm. The English equi…

Suspension position (tsuri-tai-i)

Acts & Techniques

Tsuri-tai-i is the suspended-body coupling position-family, with the body lifted from the …

Sweater Fetish

Sweater fetish is the costume-fetish category for women in knitted sweaters and knitwear. …

T

Tachi (active role in same-sex relationships)

Tachi is Japanese slang for the active, masculine partner in same-sex relationships, espec…

Tachi Matsuba (Standing Pine-Leaf)

Acts & Techniques

Tachi matsuba is a standing posture in Japan's Edo-period forty-eight hands: the receiver …

Tachi-back (Standing Rear-Entry)

Acts & Techniques

Tachi-back is the standing rear-entry position: the receiving partner leans forward, the i…

Tachi-Hanabishi (Standing Flower-Diamond Position)

Acts & Techniques

Tachi-hanabishi is a standing position of the forty-eight hands, in which a couple join wh…

Tachi-manguri (Standing Manguri)

Acts & Techniques

Tachi-manguri is a standing derivative of the manguri-gaeshi, a forty-eight-hands flexion …

Tachinbo (Street Prostitution)

Tachinbo is the colloquial term for an unlicensed prostitute who waits on the street for c…

Taimen-za (Face-to-Face Sitting Position)

Acts & Techniques

Taimen-za, the face-to-face sitting position, is the form in which the two sit facing each…

Taisho Roman

History & Culture

Taisho Roman is the cultural current of Japan's Taisho period (1912-1926): the moga and mo…

Tall stature (character archetype)

Body & Sensation

Tall stature is a Japanese fan-culture body-type attribute for women above average height …

Tandere character type

Tandere is a quiet, expressionless, slow-to-react character type harbouring strong affecti…

Taninbou (the rival's cock in NTR)

Taninbou is NTR-genre slang for the penis of a man other than the protagonist. A device fo…

Tattoo Fetish

Tattoo fetish is sexual or aesthetic attraction to tattooed bodies. The Japanese case is s…

Tayuu

Tayuu was the highest courtesan rank in early-modern Kyoto's Shimabara and Edo's Yoshiwara…

Teeth (ha)

Body & Sensation

Teeth (ha) are the hardest tissue in the human body and a feature of facial-visual vocabul…

Tekoki (Hand Job)

Acts & Techniques

Tekoki is the Japanese adult industry term for manual stimulation of the penis. Central to…

Tentacle-mono (tentacle-genre adult media)

Tentacle-mono is the Japanese adult-media genre of works depicting tentacle-bearing fictio…

Terekura (Telephone Club)

Terekura is a meeting trade, born in 1985, in which a male customer waits in a booth for a…

The AV Bubble (Japanese Adult Video Boom, Late 1980s–1990s)

History & Culture

The AV Bubble is the rapid-growth period of Japan's adult video industry from the late 198…

The Naked Director

The Naked Director is a Netflix original Japanese drama from 2019. Based on AV director To…

Thigh (futomomo)

Body & Sensation

Futomomo is the Japanese vernacular for the thigh, the region between hip and knee. In fet…

Thong (T-Back)

The thong (Japanese T-back) is women's underwear or swimwear leaving the buttocks uncovere…

Tights Fetish

Tights fetish is the focused interest in opaque hosiery covering the full leg. It runs par…

Time-Stop Series (Japanese AV Genre)

The time-stop series is a Japanese adult video genre built on a time-freezing premise, est…

Tip-Based Erotic Streaming

Tip-based erotic streaming is the revenue form in which a live streamer escalates exposure…

TL Manga (Teen's Love)

TL (Teen's Love) is a romance manga genre with sexual depiction aimed at women in their tw…

Tongue (shita)

Body & Sensation

Shita is the Japanese term for the tongue, the muscular organ of the floor of the mouth. B…

Toranoana

Toranoana (Comic Toranoana) is one of Japan's largest doujinshi specialty stores, founded …

Tousatsu (Voyeuristic Photography)

Tousatsu is photographing someone under their clothing or in a sexual state against their …

Training-camp scenario (J-AV / hentai genre)

Training camp is the Japanese adult-content category for works set in club, society, or wo…

Training/development eroge

Training eroge is the Japanese adult-simulation type that makes the gradual change of a ch…

Transfer-student moe (tenkousei)

Transfer-student moe is the attraction to the newly-enrolled student character. The newcom…

Transgender

Transgender names persons whose gender identity differs from sex assigned at birth. Covers…

TSF (Gender-Transformation Genre)

TSF is the Japanese fiction genre in which a character's body sex is transformed by an in-…

Tsubame Gaeshi (Swallow Reversal)

Acts & Techniques

Tsubame gaeshi is a transition-type position in the Edo-period forty-eight hands, switchin…

Tsume Fetish (Nail Fetish)

Tsume fetish, nail fetish, is the general term for a taste that makes a woman's nails, fin…

Tsundere

Tsundere is a Japanese character archetype alternating between cold (tsun) and affectionat…

Twins Moe (Futago Moe)

Futago moe is the Japanese otaku archetype for attraction to twin characters and the pleas…

Twintails

Twintails is the Japanese anime-and-manga hairstyle binding hair into two tails. Distinct …

Types of Orgasm

Body & Sensation

How contemporary sexology classifies orgasm: clitoral, vaginal, G-spot, blended, anal, pro…

U

Uki Matsuba (Floating Pine-Leaf)

Acts & Techniques

Uki matsuba, the floating pine-leaf, is a variant of the pine-leaf collapse among the fort…

Uki-chausu (floating-mortar position)

Acts & Techniques

Uki-chausu is the forty-eight hands variant of the cowgirl (chausu) position with one leg …

Ukiyo-e

History & Culture

Ukiyo-e is the Edo-period genre of Japanese woodblock prints and paintings on urban subjec…

Underground Porn (Japan)

Underground porn in Japan covers material that circumvents AV self-regulation and the obsc…

Underwear Fetish (Shitagi Fetish)

Underwear fetish is arousal at women's underwear itself, or the figure wearing it: bras, p…

Upper Arm Fetish

An upper arm fetish is the attraction to the female upper arm: its soft texture, the pale …

Upturned-eyes fetish (tsurime)

Tsurime fetish is the pull felt toward upturned eyes whose outer corners slope up. It read…

Ura-aka (Burner Account)

Ura-aka is the Japanese term for an anonymous secondary social-media account for sexual po…

Urethra

Body & Sensation

The urethra is the tubular organ carrying urine from the bladder out of the body. It is ab…

Uterus (shikyuu)

Body & Sensation

Shikyuu is the Japanese term for uterus: the pear-shaped hollow muscular organ of the fema…

V

Vaginal Orgasm (Naka-iki)

Body & Sensation

Naka-iki is Japanese slang for a female orgasm reached through vaginal stimulation, contra…

Vaginismus (chitsu-keiren)

Body & Sensation

Vaginismus is involuntary pelvic-floor muscle contraction making vaginal penetration diffi…

Vampire erotica genre (J-adult media)

Vampire erotica is a Japanese adult genre on vampire characters, layering the bite at the …

Vibrator

Vibrator is the general category of vibration-based sex toys, ranging from the 19th-centur…

Virginity (Shojo)

Body & Sensation

Shojo names the cultural category of the sexually inexperienced adult woman in Japanese. R…

Visual novel

Visual novel is the Japanese-origin game genre combining text, character sprites, backgrou…

Voice fetish (koe)

Voice fetish is the aesthetic and erotic interest in particular voice qualities, registers…

Voyeurism-Themed Fiction

Voyeurism-themed fiction is the adult genre built on peeping and hidden observation. The o…

VR adult content

VR adult content covers HMD-delivered sexual material in two forms: live-action stereoscop…

VTubers and Erotic Content

The umbrella term for R-18 fan creation themed on VTubers, spreading into the doujin field…

W

Waisetsu (Obscenity Concept in Japanese Law)

Waisetsu is the judicial concept of obscenity in Japanese law. Defined by the 1957 Chatter…

Wakarase (breaking pride through dominance)

Wakarase is the kink and genre centred on subjugating an arrogant opponent, pride and all.…

Warai-e (Laughing Pictures)

History & Culture

Warai-e is one of the Edo-period names for shunga. The word shunga spread only from Meiji;…

Water play (mizu-zeme, BDSM context)

Acts & Techniques

Water play is the BDSM sensory-play category using water, ice, and temperature variation a…

Wax Play (Rousoku Play)

Wax play (Japanese rousoku play) drips molten wax onto a consenting partner's skin for the…

Wedding Dress Kink

Wedding dress kink is the focused interest in the white bridal dress as an erotic surface,…

Whipping Training (Muchi-Uchi Choukyou)

Whipping training names the SM-play class using leather whips and riding crops, foreground…

Whisper Voice

Whisper voice is a strand of doujin audio foregrounding close-range whispering at the ear.…

White coat kink (hakui)

Hakui is the Japanese category for the white-coat uniform worn by doctors, scientists, pha…

Women-oriented AV

Women-oriented AV is the category of Japanese adult video designed for a female viewer, fo…

Wooden Horse (Sankaku Mokuba)

The sankaku mokuba (triangle wooden horse) is an SM apparatus from a torture device with a…

Workplace Genre (Shokuba-mono)

The workplace genre is adult fiction staged in companies and offices, using occupational r…

Y

Yagai (Outdoor Sex)

Yagai is the Japanese term for outdoor sexual activity, treated as both a kink category an…

Yandere

Yandere is a Japanese character archetype: a love interest whose affection is so intense i…

Yankee character moe

Yankee character moe is attraction to delinquent and ex-yankee character types in Japanese…

Yaoi

Yaoi is the Japanese fan-comic tradition of female-authored male-male romantic fiction, fr…

Yarakashi (accidental-mishap genre)

Yarakashi is a Japanese 2D genre in which a female character triggers a sexual situation t…

Yarichin (man-whore slang)

Yarichin is Japanese slang for a young man who frequently pursues casual sex with many wom…

Yariman (Slang Character Type)

Yariman is a Japanese derogatory slang term for a sexually active woman. In adult fiction …

Yobai (Night-Crawling)

History & Culture

Yobai was the night-crawling courtship custom of pre-modern Japanese rural communities, or…

Yoga pants fetish

Yoga pants fetish is attraction to high-stretch synthetic pants that cling to the lower bo…

Yogaru (Writhe in Pleasure)

Acts & Techniques

Yogaru is a Japanese verb for giving oneself over to sexual pleasure, crying out and writh…

Yokujou (carnal desire)

Body & Sensation

Yokujou is a Sino-Japanese word for the state in which sexual desire rises and the impulse…

Yose Chidori (Closing Plover)

Acts & Techniques

Yose chidori, the closing plover, is a side-position variant among the forty-eight hands: …

Yoshiwara

History & Culture

Yoshiwara was the licensed pleasure quarter of Edo, operating 1617-1958. It was a major ce…

Yotsunbai (On All Fours Position)

Acts & Techniques

Yotsunbai is the on-all-fours position, the standard receiving-partner posture for rear-en…

Youkya (extrovert-type attraction)

Youkya-kei is attraction to bright, sociable 'sunny-personality' figures who are loud and …

Younger-girl preference (toshishita)

Toshishita-kei is the preference for female characters set younger than the protagonist. I…

Yukata

Yukata is the Japanese single-layer cotton summer kimono, descended from the Heian-period …

Yukiji Asaoka

Yukiji Asaoka (1935-2018) was a Japanese actress, singer, and TV personality. A 1968 remar…

Yuma Asami

Yuma Asami (born 1987) is a former Japanese AV actress and television personality. She deb…

Yuri

Yuri is the Japanese narrative genre of romantic and erotic relationships between women. D…

Yuujo (courtesan)

Yuujo is the general term for women whose work was sexual service in pre-modern Japan's li…

Z

Zecchou (Orgasm)

Acts & Techniques

Zecchou is the Japanese term for sexual orgasm. Covers the Masters and Johnson response cy…

Zenra (Full Nudity)

Zenra is the state of wearing no clothing at all. This entry covers etymology, the cultura…

Zenritsusen (Prostate)

Body & Sensation

Zenritsusen, the prostate, is a chestnut-sized male accessory sex gland below the bladder.…

Zentai

Zentai is the Japanese category for head-to-toe stretch-fabric suits covering face, hair, …

Zoning (Adult Content Segregation)

Zoning is the institutional separation of adult content from general-audience channels. Th…