When Chuta, a badly injured mouse, staggers off a ship in Tokyo Harbor, he bumps into out-of-towners Gamba and Bobo, who are at a party being given by Yoisho, the sailor-mouse. Chuta tells the local mice that he has escaped from Devil's Island, where Norio the evil ermine has crushed the mice with his reign of terror.
Unfortunately the movie The Adventure of Gamba and the Otter is not yet available on HBO Max.
| Directing | Shunji Ôga | Director |
| Writing | Nobuaki Kishima | Writer |
| Writing | Atsuo Saito | Novel |
