Masahiko Koseki, a judo master, gets in several fights as a result of protecting a young woman. Despite his success, Koseki is expelled from his judo school because of his propensity for street fighting. He goes to work for a gangster named Joji, but when he realizes that Joji is mixed up in the slave trade, Koseki helps the police in their attempts to foil Joji.
| Actor | Role |
|---|---|
 Toshirō MifuneMasahiko Koseki | Masahiko Koseki |
 Shin SaburiMasazumi Asaji | Masazumi Asaji |
| AAkio KoboriShiro Katahara | Shiro Katahara |
 Kyōko KagawaShizue Amaji | Shizue Amaji |
 Mariko OkadaKikuko Kamo | Kikuko Kamo |
 Asami KujiOyo | Oyo |
 Akihiko HirataShunsuke Iba | Shunsuke Iba |
| HHideo SaekiHachiro Iba | Hachiro Iba |
 Yū FujikiKotetsu | Kotetsu |
 Haruo TanakaJoji the coolie procurer | Joji the coolie procurer |
 Shōsaku SugiyamaNot listed | Not listed |