Dead or Alive (1999)

Without a home and feeling no obligation to Japanese society or Yakuza, Ryuichi (Takeuchi Riki) and his small group decide to make their own place by trying to take over the Shinjuku underworld and the drug trade from Taiwan. As they plan an all-out-assault on the remaining Chinese and Japanese mafia kings, only Detective Jojima (Aikawa Sho) stands between them and complete domination.