Shinjuku Triad Society: Chinese Mafia Wars is unlikely to get distribution in the West outside film festivals. Why? Could your censors stomach a film where policemen anally rape male and female suspects to get them to talk (and the victims enjoy it) or see an old lady have her eye torn out of her skull? These are just a few of the shocks in store for viewers of this ultraviolent cops and gangsters story. It makes Clockwork Orange which was banned for years in the UK look like a Disney cartoon.
Should you see this film? YES It is fantastic and essential viewing for fans of Asian cinema. The shocking moments are there to illustrate what goers on in the world of these characters. If you like this make sure you catch Dead or Alive which is very similar (barring the insane ending in DOA of course). Great for Japan that they have a talent like Miike working at the same time as Takeshi Kitano. The best chance of seeing this film outside a Takashi Miike retrospective at a film festival is on DVD. If I haven't put you off try hunting for a Hong Kong version on the web as I'm sure it will come out in that country.