Kaisei Sakamoto is a 16 year old boy who is inclined to settle everything with his fists. He grew up in a town where you can see both Nagazaki and Gunkanjima, living with his father. His father, Genkai Sakamoto, runs a small ramen shop. The father-son duo has just recently had a large fight. The story showcases fragments of one's youth and the questions that crop up while growing up.
Unfortunately the movie Warship Boy is not yet available on HBO Max.
| Directing | Yuki Saito | Director |
| Crew | Yohei Tateishi | Cinematography |
| Writing | Yasunori Matake | Screenplay |
| Sound | Nobuko Toda | Original Music Composer |
