Akira Hanagami

A woman on her way to Tokyo is repeatedly raped by various men she encounters on the highway. (imdb)

A wealthy land-owner "buys" his wife in order to pay off her father's debts. Of course, hubby is into rope-bondage and rough-sex, and wifey ain't. Six months of marriage goes by and the husband's overbearing sister comes for a visit (who it is alluded to has shared a sexual relationship in the past with her brother), and she begins meddling in the couple's relationship when she catches the wife passing messages to a lover via one of the male housekeepers (who is also in love with the wife). (imdb)

Mitsuko has the sensation of being watched. The feeling doesn't pass. Then, one day, her husband, a jewerly dealer, invites his product-buyer home for dinner and some drinks. Instantly, Mitsuko realizes this is the man who has been spying on her. When the husband gets drunk and dozes off, Mitsuko is raped by this man. (Sex Files Japanese Cinema Encyclopedia)

At the end of the Taisho Era, Geisha Hanasei is dumped by her patron. She steals a baby in a fit of anger that was conceived by his mistress. The boy grows up as Hanasei's son and as he's been around brothels all his life, he is a sex expert.

17th film in the Apartment Wife series.