The Yakuza Papers 2: Hiroshima Deathmatch

In 1950, Shoji Yamanaka is involved in a fight over cheating in a card game and stabs several men. He is sentenced to prison. When he is released from prison, he goes back to Hiroshima. In Hiroshima, he eats at a restaurant but has no money to pay. The waitress, Yasuko offers to let him off but a gang led by Katsutoshi Otomo, the rebellious son of gangster leader Otomo, beat him. He is saved by Otomo senior and then he is offered a job as a gangster by Muraoka, Yasuko's uncle.
(Source: Wikipedia)