Graveyard of Honor 1975

Finding himself in the right place at the right time, Isimatsu, a simple dishwasher, saves the life of a yakuza boss, who, as a reward, makes him one of the top leaders of his clan. The carefree and unpredictable life of a gangster acts like a drug on the simple guy; he revels in violence and lawlessness, quickly earning a reputation as a rabid thug. But a ridiculous accident, in which Ishimatsu accidentally shoots his boss, instantly turns him into an outcast. Now the crazed yakuza is being hunted by former friends and sworn enemies alike, and it seems that the lone wolf has nothing but a straight path to hell ahead of him.