Female Convict 101: Suck (1977)

A troubled ex-prostitute turned barkeep is enchanted by the love of a younger man named Kenichi. After trusting a violent junkie to help with her young lover’s singing career, she is sent to prison for murder. Now known only as Prisoner 101, she spends her days in the dirty prison system full of violent guards and sexually-aggressive inmates.

Nikkatsu Corporation