Based on

Movies like Aftermath of Battles Without Honor and Humanity (1979)

Two Kyushu based yakuza groups are desperate for domaination of the area. When more powerful yakuza groups get involved in their power struggle, a group of childhood friends, belonging to different yakuza families, are caught in the middle. Lies, deceit, and backstabbing are in play resulting in a bloodbath and a quest for revenge...