Shinjuku Triad Society (Shinjuku kuroshakai: Chaina mafia sensô) is a 1995 Japanese film directed by Takashi Miike. The film is one of the earliest examples of Miike's use of extreme violence and unusual characterization, two aspects he would become notorious for. The film is part of the Black Triad trilogy and is followed by Rainy Dog and Ley Lines.
The film is based around the interactions of a homosexual triad group with a police officer as well as opposing yakuza organizations. When the younger brother to a renegade police officer becomes the lawyer to the triad group, an argument between the two leads to the downfall of the organization.