The Big Boss

"The Big Boss" is a 1959 Japanese crime drama film directed by Kazuo Ikehiro, not Okabon Kizunosuke as stated in the source. The film tells the story of Ryuta Komatsu (Koji Tsuruta), a yakuza leader whose brother Mineo (Akira Takarada) wants to leave the gang and pursue a singing career. As Mineo's defection poses a threat to Ryuta's power, he must decide whether to kill his own brother to ensure his survival.