is a fetish subculture recognized predominantly in Japan, in which participants experience arousal from having a full bladder or arousal for seeing someone else experiencing the feeling of a full bladder. Outside 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.

is a fetish subculture recognized predominantly in Japan, in which participants experience arousal from having a full bladder or arousal for seeing someone else experiencing the feeling of a full bladder. Outside 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.