Fuma ninja clan is a secret ninja tribe that is waiting for the "Orochi" (gigantic snake) to resurrect for generations. Shirasu and his twin brother Ichiu grew up in this viscous environment and this tells how they become the leaders of the clan.
Unfortunately the movie Donten: Laughing Under the Clouds - Gaiden: Chapter 2 - The Tragedy of Fuuma Ninja Tribe is not yet available on HBO Max.
| Writing | Tomomi Kawaguchi | Screenplay |
| Visual Effects | Miyuki Kowata | Color Designer |
| Writing | Eiji Umehara | Series Composition |
| Sound | Yutaka Yamada | Original Music Composer |
| Directing | Tetsuya Wakano | Action Director |
| Editing | Katsuhiro Kimura | Online Editor |
| Visual Effects | Tatsuaki Okamoto | Key Animation |
| Visual Effects | Sun Meng | Key Animation |
| Visual Effects | Hisateru Manabe | Key Animation |
| Visual Effects | Kenji Fujisaki | Character Designer |
| Writing | Eiji Umehara | Screenplay |
| Visual Effects | Takaaki Chiba | Character Designer |
| Visual Effects | Yuki Masuya | Character Designer |
| Visual Effects | Koichi Usami | Lead Animator |
| Visual Effects | Yuki Masuya | Animation Director |
| Visual Effects | Tatsuaki Okamoto | Animation Director |
| Visual Effects | Yu Ogasawara | Key Animation |
| Visual Effects | Tatsuo Honda | Key Animation |
| Visual Effects | Manabu Yasumoto | Key Animation |
| Visual Effects | Ryota Obana | Key Animation |
| Visual Effects | Tomonori Ota | Key Animation |
| Visual Effects | Hiroyuki Hojo | Key Animation |
| Visual Effects | Takeshi Matsuda | Key Animation |
| Visual Effects | Nanako Ninomiya | Key Animation |
| Crew | Ayuko Harada | Special Effects |
| Camera | Hideki Imaizumi | Director of Photography |
| Visual Effects | Takaaki Chiba | Key Animation |
| Sound | Kohei Chida | Music Director |
| Visual Effects | Miho Matsuura | Key Animation |
| Visual Effects | Hiroyoshi Iida | Key Animation |
| Visual Effects | Nanami Tanaka | Key Animation |
| Visual Effects | Kii Tanaka | Character Designer |
| Art | Miu Miyamoto | Art Direction |
| Visual Effects | Kyoko Kotani | Key Animation |
| Visual Effects | Kii Tanaka | Supervising Animation Director |
| Production | Toshio Iizuka | Executive Producer |
| Art | Yuki Masuya | Prop Designer |
| Visual Effects | Asami Shimizu | Key Animation |
| Visual Effects | Kouji Matsuyama | Key Animation |
| Visual Effects | Yoshiki Mizuno | Key Animation |
| Visual Effects | Li Shaolei | Animation Director |
| Visual Effects | Masami Nagata | Animation Director |
| Visual Effects | Hironori Tanaka | Key Animation |
| Visual Effects | Eriko Haga | Key Animation |
| Visual Effects | Teruyo Kato | Key Animation |
| Visual Effects | Youichi Shimizu | Key Animation |
| Art | Mai Teshima | Prop Designer |
| Visual Effects | Mamiko Nakanishi | Key Animation |
| Visual Effects | Mizue Ogawa | Key Animation |
| Visual Effects | Harumi Tsunoda | Key Animation |
| Production | Noriko Kosukegawa | Producer |
| Visual Effects | Naoto Yoshida | Key Animation |
| Visual Effects | Yumi Shimojo | Animation Director |
| Visual Effects | Reina Kawasaki | Key Animation |
| Visual Effects | Guan Zhenyu | Animation Director |
| Visual Effects | Akito Dobashi | Key Animation |
| Sound | Noriko Izumo | Sound Effects |
| Directing | Hitomi Ezoe | Assistant Director |
| Visual Effects | Masami Nagata | Key Animation |
| Visual Effects | Kumiko Ozawa | Key Animation |
| Visual Effects | Emi Honda | Key Animation |
| Visual Effects | Sunghoo Park | Key Animation |
| Sound | Shoji Hata | Sound Mixer |
| Sound | Mami Takaishi | Music Producer |
| Visual Effects | Yuki Masuya | Key Animation |
| Visual Effects | Masashi Sato | Key Animation |
| Visual Effects | Kota Sera | Key Animation |
| Visual Effects | Koichi Usami | Key Animation |
| Visual Effects | Katsuya Yoshii | Key Animation |
| Visual Effects | Yusuke Shingu | Key Animation |
| Visual Effects | Kyoko Sugiyama | Key Animation |
| Visual Effects | Atsushi Kasano | Key Animation |
| Visual Effects | Yui Mizushima | Key Animation |
| Visual Effects | Keizou Ichikawa | Animation Director |
| Visual Effects | Chisato Hosokawa | Key Animation |
| Visual Effects | Kiko Hashimoto | Key Animation |
| Visual Effects | Kamoyuki Mitani | Key Animation |
| Visual Effects | Yasuko Miyazaki | Key Animation |
| Visual Effects | Yoshimi Imagawa | Key Animation |
| Visual Effects | Kumiko Kakoi | Key Animation |
| Production | Yoshimasa Okunaga | Producer |
| Production | Shin'ichi Nakatsuka | Producer |
| Visual Effects | Tamami Izawa | Animation Director |
| Visual Effects | Yumi Shimojo | Key Animation |
| Visual Effects | Keizou Ichikawa | Key Animation |
| Visual Effects | Shinichi Nozaki | Key Animation |
| Visual Effects | Kaori Saito | Key Animation |
| Visual Effects | Yukari Watabe | Key Animation |
| Visual Effects | Miyachi | Key Animation |
| Camera | Yuuki Aida | Director of Photography |
| Art | Tetsuhiro Shimizu | Background Designer |
| Visual Effects | Suguru Iijima | Key Animation |
| Sound | Shoji Hata | Sound Director |
| Art | Miu Miyamoto | Background Designer |
| Visual Effects | Takuma Ebisu | Key Animation |
| Directing | Tetsuya Wakano | Second Unit Director |
| Visual Effects | Fumiko Kon | Key Animation |
| Visual Effects | Takaaki Chiba | Animation Director |
| Directing | Ryuhei Aoyagi | Second Unit Director |
| Visual Effects | Tamami Izawa | Key Animation |
| Directing | Hitomi Ezoe | Second Unit Director |
| Directing | Kazuya Aiura | Second Unit Director |
| Sound | Masafumi Watanabe | Foley Artist |
| Visual Effects | Shinya Kanetake | Compositing Artist |
| Visual Effects | Mai Nakamura | Compositing Artist |
| Art | Tetsuya Wakano | Storyboard Artist |
| Visual Effects | Fumiya Shima | Compositing Artist |
| Visual Effects | Yuzuru Funakoshi | Compositing Artist |
| Directing | Tetsuya Wakano | Director |
| Visual Effects | Achille Bibard | Key Animation |
