Undercover Officer, Osaka Prefectural Police

Bent on revenge, a traumatized ex-police officer must infiltrate a yakuza organization by befriending one of the group's most unhinged members.

Reiji Kikukawa, who has a strong sense of justice, graduated from the police academy with the lowest score ever. He becomes a police constable, but is suddenly fired by the Police Chief due to "disciplinary" issues. In actuality, the firing is part of a carefully orchestrated plan to set him up as an undercover cop in the Yakuza.

Tatsuhito, a cop, pursues Chinese warlord Wang through the underworld of Shinjuku and over to Taiwan.

Two New York cops get involved in a gang war between members of the Yakuza, the Japanese Mafia. They arrest one of their killers and are ordered to escort him back to Japan. However, in Japan he manages to escape, and as they try to track him down, they get deeper and deeper into the Japanese Mafia scene and they have to learn that they can only win by playing the game—the Japanese way.

When a mysterious stranger muscles into two rival yakuza gangs, Tokyo's underworld explodes with violence.