The World of Shura.

A yakuza movie starring Koji Matoba, depicting the lives of men left behind in the times. In the Ryuan-gumi, which is based in Yokohama, drug business was prohibited by the leader Engetsu. One day, in order to protect leader's teachings, Mouri of the Ryuan-gumi assassinates the leader of the Yamagami group, a hostile organization that trades drugs. This causes a conflict with the neutrals in the Ryuan-gumi. During this turbulent time, the leader Engetsu asks Mouri to take care of his son Saiga and guide him on the path to becoming a yakuza.