Profit from Killing (1964)

The bustling Ikebukuro area was under the control of the Hanamura Kogyo yakuza gang, and there was no end to the violence. The tramp Satoshi Tsuzuki returns to his hometown after being released from Abashiri prison, and he is noticed when he saves a student from gangsters from the Hanamura gang. But this was only the beginning of a bloody struggle...