A Japanese pinku film.

Abnormal Passion Case: Razor (1978). a.k.a. Eroticism. Directed by Giichi Nishihara

A husband who works as a janitor has a wife who is exhausted by his repeated demands for sex. Frustrated by her refusal he steals chloroform from work and drugs her to get what he wants. But he doesn’t stop there. He decides to try it on any woman he can find.

A widowed ikebana instructor has debt issues due to her late husband's penchant for gambling, and moonlights as a prostitute in order to pay down the debt. Jealousy leads her to lure one of her students, a happily married young woman, into prostitution...

Pinku from 1977.

"Jealous" man-killer Mayumi (Hitomi Kozue) is sent back into solitary confinement after being re-arrested for the murder of the doctor who fingered her for a botched surgery. After emerging from solitary confinement to find an all-new gang of bullies picking on a meek, young female prisoner, Mayumi is now a much harder soul who takes no attitude from anyone, and she turns savage when the poor girl is enslaved by Yakuza.