There is a legend in Japan that if one eats the flesh of a mermaid, one will become immortal. This anime recounts the story of Yuhta and Mana, an immortal boy and girl, and their experiences with a family struggling to achieve immortality at any cost.
Unfortunately the movie Mermaid Forest is not yet available on HBO Max.
| Directing | Takaya Mizutani | Director |
| Visual Effects | Sayuri Ichiishi | Key Animation |
| Visual Effects | Norihiro Matsubara | Key Animation |
| Visual Effects | Hiroaki Hanawa | Key Animation |
| Visual Effects | Hiromasa Imai | Key Animation |
| Visual Effects | Toshiko Nakaya | Key Animation |
| Visual Effects | Yoshihiro Owada | Key Animation |
| Visual Effects | Norifumi Okuyama | Key Animation |
| Visual Effects | Junichi Takaoka | Key Animation |
| Visual Effects | Kei Sakai | Key Animation |
| Visual Effects | Nobuyuki Tokinaga | Key Animation |
| Visual Effects | Shizuko Minami | Key Animation |
| Visual Effects | Taeko Hattori | Key Animation |
| Writing | Shoichiro Okubo | Screenplay |
| Sound | Kenji Kawai | Music |
| Crew | Rumiko Takahashi | Creator |
| Camera | Hajime Noguchi | Director of Photography |
| Writing | Rumiko Takahashi | Original Series Creator |
| Writing | Rumiko Takahashi | Writer |
| Art | Katsuyoshi Kanemura | Art Direction |
| Visual Effects | Sayuri Ichiishi | Animation Director |
| Sound | Yasunori Honda | Sound Director |
| Production | Isamu Asami | Producer |
| Production | Isamu Senda | Producer |
| Editing | Kazuhiko Seki | Editor |
| Editing | Shuichi Kakesu | Editor |
| Editing | Yasue Funami | Editor |
