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To pee or not to pee: A beginner’s guide to omorashi

In two previous blogs on the sexual paraphilias of salirophilia (i.e., deriving sexual arousal from soiling or disheveling the object of their desire) and urophilia (i.e., deriving sexual arousal from the sight or thought of either the act of urination or the urine itself) I briefly made reference to omorashi (i.e., deriving sexual pleasure from having a full bladder). Dr. Anil Aggrawal in his 2009 book Forensic and Medico-legal Aspects of Sexual Crimes and Unusual Sexual Practices defines omorashi more specifically as being sexually aroused “from having a full bladder or a sexual attraction to someone else experiencing the discomfort of a full bladder” and also notes that it is “a fetish subculture predominantly seen in Japan”. Frances Twinn’s 2007 book, Miscellany of Sex also notes:

“[Omorashi is] mainly Japanese phenomenon, where a full bladder and wetting oneself in public causes arousal. Game shows and sex trade workers in Japan cater in large numbers to this fetish. Followers can also turn to Wet Set Magazine, an Australian-based publication aimed mainly at western practitioners”

In an online article at Listverse about the ‘top ten’ most bizarre fetishes, omorashi made an appearance in the number 10 spot and claimed (using information lifted from the Wikipedia entry on omorashi) that:

“For [omorashi] fetishists, climax usually coincides with the moment of relief and embarrassment experienced when the desperate individual loses bladder control. Though there is a small community devoted to such fetishism outside of Japan, it is usually overshadowed by the more hardcore fetishes, urolagnia and urophagia. Most omorashi videos are among the most softcore of erotica, featuring innocent young women, fully clothed, who have gotten themselves into an embarrassing bathroom situation. Commonly featured are schoolgirls, female working professionals, and other women attempting to look dignified before succumbing to the urge to childishly wet themselves”.

The Wikipedia entry is a little more detailed and claims that:

Outside of Japan, it is not usually distinguished from urolagnia (urine fetish), though they are different things. Westerners who do make the distinction commonly use phrases such as ‘bladder desperation’ or ‘panty wetting’. The Japanese language term from which the subculture’s name is derived means ‘to wet oneself’ literally translated, ‘leaking’. The word is also occasionally romanized as ‘omorasi’ in the Kunrei-shiki romanization system”.

In researching this blog I came across a dedicated omorashi website ( that describes itself as a softcore fetishist community that focuses on omorashi practices as well as other urophilic activities and claims to host over 525GB worth of videos and images. Another dedicated website is the And The Worst Thing Is All That Juice I Drankrun by a self-confessed omorashi fetishist, and features lots of omorashi fan fiction and fan art. The website owner says:

“My omorashi fetish is rather specific. I generally prefer desperation with accidental wetting (basically, just unintentional), clothed, male rather than female, nonsexual for the victim, and I really like seeing their mortification during and afterwards. So my posts will probably be biased toward that kind of thing. This is really just a place for me to indulge, but you are more than welcome to come along for the ride if you happen to enjoy it!”

The Wikipedia article also makes the point that:

Most fetish activities concerning the use of bodily waste are considered by the general public as ‘hardcore’, taboo, or edgeplay. However, because the object of the fetish is clothed incontinence, omorashi videos do not feature direct sexual contact. The focus on clothed rather than overtly sexual images makes garment fetishism a prominent feature in most omorashi erotica: commonly featured outfits include those worn by schoolgirls, female working professionals, and other women attempting to look dignified before succumbing to the need to urinate”.

In Japanese subculture, there are a number of different ways by which the omorashi fetish can be practiced including ‘yagai’ and nappies (i.e., diapers). According to Wikipedia, ‘omorashi yagai’ translates as “to wet oneself outdoors (or publicly)”. Another variation of this is ‘yagai honyo’ that refers to outdoor (i.e., public) urination where the person removes their clothes in public to urinate. The Wikipedia article also claims that the practitioners of yagai honyo are similar to graffiti artists in that they engage in a public act without being caught. The practice of urinating in public while wearing a nappy (instead of underpants or knickers) is known as ‘oshime omorashi’ (as the literal translation is “to wet oneself in a diaper”). The article also claims that:

“Diapers may be favorable for public wetting because they render it more discreet and eliminate mess, and their use is not limited specifically to those with a diaper fetish. However, omorashi fetishists specifically interested in this aspect of the subculture could be considered a Japanese variation of the diaper lover community”.

An online article on omorashi at the Nation Master website also notes:

Depending on one’s role in an omorashi scenario (as the wetter or the watcher) these acts could be variously considered a form of sadism, masochism, sadomasochism, or erotic humiliation. It is worth noting that these scenarios almost invariably feature female wetters over males, and that the focus generally falls on the wetter’s tendency toward the irrepressible submissive qualities commonly associated with feminine weakness. In Japan, these attitudes are recognized as belonging to the wider archetyp of moe (pronounced “mo-eh”) fetishism. From this perspective, the incontinence serves as the essential, obvious sympathetic weakness that moe characters work hard to correct but never really succeed at getting rid of”.

To Excluding research on orgasm during urinary incontinence (see ‘further reading’ below for a couple of academic papers on the topic), I’ve come across very little that’s been written academically about omorashi. Dr. Christy Gibbs carried out her PhD on transgressing sexualities in Japanese animation and mentioned omorashi in passing but only as a type of Japanese sexual practice while talking about other Japanese-oriented animated pornography such as ‘tentacle rape’. Another academic paper that mentioned omorashi in passing was by Dr. Clarissa Smith in a 2009 issue of the journal Sexualities (in a paper exploring sexual cultures in the classroom), but again there was nothing of substance about omorashi itself. Maybe there’s more written in Japanese that I’ve been unable to access and/or understand. There’s certainly little written in English, even anecdotally.

Dr Mark Griffiths, Professor of Gambling Studies, International Gaming Research Unit, Nottingham Trent University, Nottingham, UK

Further reading

Aggrawal A. (2009). Forensic and Medico-legal Aspects of Sexual Crimes and Unusual Sexual Practices. Boca Raton: CRC Press.

Gibbs, C. (2012). Transgressing sexualities in Japanese animation. University of Waikato, PhD. Located at:

Hilton, P. (1988). Urinary incontinence during sexual intercourse: a common, but rarely volunteered, symptom. British Journal of Obstetrics and Gynecology 95, 377-381.

Khan, Z., Bhola A., & Starer P. (1988). Urinary incontinence during orgasm. Urology, 31, 279-282.

Listverse (2007). Top 10 bizarre fetishes. September 24. Located at:

Nation Master (2013). Omorashi. Located at:

Smith, C. (2009). Pleasure and distance: Exploring sexual cultures in the classroom. Sexualities, 12, 568-585.

Twinn, F. (2007). The Miscellany of Sex: Tantalizing Travels Through Love, Lust and Libido. London: Arcturus.

Wikipedia (2013). Omorashi. Located at: