Pinku from 1965.

Undercover cop Kikuchi teams up with the Okinawa local police to clean up the narcotics and prostitution underworld.

A blackmail ring uses illicit photos of an unfaithful wife to force her into prostitution.

Shizu is a housewife whose husband has just flown to Germany to work in his company's branch office. During her husband's absence, Shizu makes her first fatal mistake with her brother-in-law which leads to other men and her involvement with gangsters, dragging her into a mire from which she cannot escape.

A housewife covertly works in a high-class brothel in Tokyo with other married women. She never wants her husband to know that she is a prostitute. The brothel and its employees were making good money, but after the accidental death of one housewife, things begin to go wrong.

Desensitized and dissatisfied, a young yet jaded sexual veteran sets out on a journey of self-discovery while teetering on the threshold of womanhood. Yasuko is taking part in an orgy when she realizes that she has lost all feeling - not just physically, but emotionally as well. Now, with the weight of responsibility and adult expectation weighing down on her shoulders, Yasuko attempts to better understand how she could be so empty at such a tender age.

With a title like that... you just have to watch it.

Nikkatsu Roman Porno

Detective Kikuchi is sent to Okinawa to investigate why a girl jumped from a window after shooting heroin. There, he encounters the usual assortment of addicts, dealers, pimps and sleazy American GIs.

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...