Sonatine (1993)

In Tokyo, the hardened boss of a well-succeeded clan, Aniki Murakawa is thinking about retirement and living with the profits of his turf. His boss, Kitajima, sends Murokawa and his men to Okinawa to resolve a dispute between their allies, the Nakamatsu and Anan clans. They are welcomed by the Nakamatsu's boss Uechi. He learns from Uechi that the dispute between clans is under control and out of the blue, they are ambushed while drinking beer in a bar. Murakawa and the survivors flee to beach house that belongs to the brother of one of the Nakamatsu's gangster and they spend their time playing childhood games. Until the day Murakawa learns that he was betrayed by Kitajima.