Star of David: Beauty Hunting (1979)

One dark and stormy night, a middle age prison escapee haphazardly breaks into the luxurious mason of a wealthy and privileged family and rapes the young wife in front of her bound husband. A year later, the son conceived by the rapist comes into the world. At the age of sixteen, he studies Nazi atrocities in history class, and feels the awakening of his inner brutality. The time has come. He launches a journey to let off a long-held grudge against the abusive foster father and to seek out a reunion with his genetic dad. He lures out his real father through newspaper ads and invites him to the secret torture chamber in the basement of the house where he confines abducted girls. Their feast of lust and perversion has now begun.
This movie is about young sex murderer. His mother herself was raped by a criminal and afterward his formerly milquetoast professor father abused both of them, believing his wife "enjoyed" the experience and his son was the product of the rape. Through either "nature" or "nurture" the son grows up to be a sex criminal himself, kidnapping women and sexually abusing them (onscreen) and then sometimes killing them (offscreen), even while he tries to have a conventional romance with a childhood friend. Eventually he meets his birth father, who is still and active rape-murderer himself.
This is a controversial movie, mostly because it has been more widely seen than most "pinku eiga" films and a lot people simply don't understand the genre. If people like violent action movies or slasher movies, no one (today at least) assumes they're homicidal maniacs because everyone knows that people aren't REALLY being killed. Well, the same thing is true in "pink" films. Of course, the women aren't REALLY being raped (nor are the girls in schoolgirl uniforms REALLY schoolgirls), and in fact the rape scenes are actually kind of ridiculous. Some people are either incapable of separating fiction from reality (notice I didn't say fantasy) or they don't give other people credit for being able to do so. The ridiculous rape scenes aren't necessarily even sex fantasies for all the male viewers (like me, for instance), but to the extent they are--well, even feminists acknowledge that woman have rape fantasies (yet don't want to really be raped), why is it surprising that many NON-RAPIST men do as well?
Ironically, the controversy largely comes about because the women in "pinku eiga" like this often end up enjoying the rape. After the "schoolgirl" is abducted, tortured, forced to masturbate for her captor and eventually violated, he lets her goes and sees her later back at school where she is now happy and well-adjusted. But this is exactly WHY these rape scenes are so unbelievable. It's an old-fashioned idea that men commit rape because they think the women "enjoy" it. Rapists are sadistic *bleeps* who probably would be very disappointed if the woman enjoyed it, or in most cases they are simply sociopaths who don't care (nobody thinks murderers, muggers, and burglars do what they do because they think their victims "enjoy" it). But you simply don't judge movies by how a child or a disturbed individual might react to them--or we'd only have movies fit for small children and disturbed minds. A NORMAL person will just laugh this off, or perhaps be titillated by the basically consensual BDSM. Besides, compare rape and sexual assault statistics in Japan to those of that "PC"/feminist fortress that is America and then you can try to tell me the problem is MOVIES. . .