An assassin trained as a ninja carries the code name M. Hayami is a yakuza boss and a divorced father who is not allowed to come near his young daughter Mutsumi from his ex-wife Kazuko. In the big port city of Yokohama, M targets Hayami, who has angered the president of his group.
| Directing | Koretsugu Kurahara | Director |
| Camera | Teruo Hatanaka | Director of Photography |
| Writing | Koichi Nakajima | Screenplay |
| Lighting | Kikuo Okada | Lighting Technician |
| Editing | Akira Suzuki | Editor |
| Sound | Tsuneo Furuyama | Sound Recordist |
| Production | Kei Ijichi | Producer |
| Writing | Michio Hashimoto | Screenplay |
| Sound | Norihito Ozawa | Original Music Composer |
| Art | Natsuo Kawafune | Art Direction |
| Production | Akira Matsuoka | Producer |
| Directing | Masao Asada | Assistant Director |