"Waka Oyabun" (Young Boss) is a yakuza film series directed by Kazuo Ikehiro and starring Raizo Ichikawa, released by Daiei from 1965 to 1967. It was a series that originally depicted the exploits of naval officer and yakuza Nanjo Takeshi, with a total of eight films produced, as representative yakuza films produced by Daiei, alongside the "Akumyo Series."