We’ve been watching a lot of these old Japanese films lately because, well, they’re usually pretty fun. Today we have Toei Studios’ comedic romp Onsen suppon geisha, aka Hot Springs Kiss Geisha, and to cut right to the chase here, Miki Sugimioto stars as a character known as Prostitute with Strong Vagina Muscles. Seriously. But it’s all in good fun. Which reminds us, we feel we’ve been remiss in pointing out to those unfamiliar with pinku, roman porno and the like that these flicks aren’t pornographic. Sexually discomfitting? Yes. Absurd? Usually. In terrible taste? Almost always. But they aren’t pornographic. Everything is accomplished through suggestion, camera angles, and clever editing. Onsen suppon geisha was part of a Hot Springs series, with Sugimoto having debuted in the first installment in 1971. In this one, she’s so good at using that super strong vagina of hers that she can fuck guys to death. In the end, she’s pitted against a sexual superman and a showdown ensues. There’s also a subplot about a mad scientist type who needs vaginal juices to create a potion designed to turn Japanese girls black—see below. Is this where the ganguro trend began? We have no idea. Onsen suppon geisha opened in Japan today in 1972.