Fukumi is a high school janitor whose father was a gangster. He works at the school as a janitor instead of belonging to the gang so he can watch out for Yui, the daughter of his deceased father's brother Majima Yoshiki. One day, a gang feud erupts. Yoshiki is killed and Yui becomes the next target.
Unfortunately the movie A Janitor is not yet available on HBO Max.
| Directing | Yugo Sakamoto | Director |
| Writing | Shozen Matsudaira | Screenplay |
| Crew | Masayoshi Deguchi | Stunt Coordinator |
| Crew | Tojiro Kurita | Cinematography |
| Production | Masako Itô | Casting Producer |
| Sound | Ken Matsubara | Music Producer |
| Visual Effects | 恒川岳彦 | Visual Effects |
| Art | Masahiro Asao | Gun Wrangler |
| Crew | Masayoshi Deguchi | Stunt Coordinator |
| Production | Atsushi Yamamura | Producer |
