Modern Chivarly: Sworn Brothers (1970)

Sinopsis

After the enactment of the Anti-Prostitution Law, the red-light district in Shinjuku lost its allure. Even the gambling den of the Ryūzaki family was always deserted. Ryūzaki, the boss, declared his retirement in response to the changing times. It was thought that Igarashi, who valued righteousness and principles and had the respect of others, would become the second-in-command. However, he was an annoying presence to Ryūzaki...