Maria Mari starred in such films as the 1978 roman porno Lusty Transparent Man and the 1981 ama flick Nympho Diver: G-String Festival, and you see her above in a beautiful promo photo from around 1978. Mari didn't make many movies—the Japanese Movie Database lists six, while IMDB has her in eight. All in all, it was a three-year run. Well, once you've had sex with an invisible man there's really nowhere else to go career-wise. 

Tômei-ningen: okase! was known in English by two titles—Lusty Transparent Man, which sounds pretty innocuous, and Invisible Man: Rape!, which sounds horrible. We’re really more interested in sharing the poster, but with regard to the film what you get here is a Nikkatsu roman porno production about a college student who invents an invisibility elixir. At that point he clumsily pervs his way like a dirty Jerry Lewis from one voyeuristic entanglement to the next, bumbling his way inside the lady parts of the female leads. How do you shoot love scenes with an invisible man? You have the women writhe around by themselves. They’re all taken by surprise, but all end up enjoying themselves. There’s some doubt whether they even realize their partner is a man, rather than a horny ghost or a figment of their own imaginations, but in any case these encounters aim for laughs, not eroticism. The question is whether you think they’re funny. We didn’t. Tômei-ningen: okase! premiered in Japan today in 1978.