Waru (2006)

A member of the Yakuza is imprisoned for violent behaviour including fighting another group of thugs. There he meets another man and the two become friends. Once released the friend is back into illicit activities and begins making money off the eastern mafia prompting that group's head to put a price on his head that leads to his death. The Yakuza member seeks to avenge his friend's death. - written ghaemi.