Hideo Yamamoto

When a Yakuza boss named Anjo disappears with 300 million yen, his chief henchman, a sadomasochistic man named Kakihari, and the rest of his mob goons go looking for him. After capturing and torturing a rival Yakuza member looking for answers, they soon realize they have the wrong man and begin looking for the man named Jijii who tipped them off in the first place... (imdb)

How Ichi becomes the Killer. The movie is a pre-quel to Takashi Miike's Koroshiya 1 (Ichi - The Killer). (IMDB)

A prequel to the original manga concentrating on the characters Ichi's past.

A man humiliates teenage prostitutes to get them off the streets. Black comedy based on a Japanese manga.

A teenage girl wants to take revenge on a psycho creep who raped her, so she convinces all her friends to pretend to be even younger than they are and work in a weird brothel for perverts. Meanwhile, the creep that raped her has embarked on a colorfully titled "stop the bitch campaign" of putting an end to teenage prostitution by raping, and not paying, teen prostitutes.

Mr. Kuni is here. Again. And he does the usual. When Megumi, the sister of our heroine whose name I didn't catch, is found dead she joins a band of teen whores lead by Aya and together they begin punishing all of the men who have sex with girls, in hope they'll eventually find Megumi's killer and have their revenge.