Taiheiyo Eiga

An impotent salaryman discovers he can have sexual experiences with unsuspecting women when he becomes an out-of-body ghost.

Pink film distributed by Nikkatsu.

Three female college students all need extra credit in order to graduate. So they convince an assistant professor into helping them with a three day cram course… in immersive sex studies.

Pinku from 1980, distributed by Nikkatsu