To celebrate their graduation from university Kaori and her two friends visit Okinawa in southern Japan for a short vacation. At the vacation house, provided by Tadashi's uncle, a numbing stench awaits the girls, and can be traced to a horrendously deformed, legged fish that Kaori kills. More and more of these creatures appear and portend a horrific change for the animal life in the area. A phone call from Kaori's fiancé Tadashi in Tokyo quickly shows the scope of this epidemic, when he is also attacked by these mechanized fish. Kaori immediately sets out on an perilous voyage to find out what happened to Tadashi, helped by Shirakawa — a videographer in search of the truth behind all this...
Unfortunately the movie Gyo: Tokyo Fish Attack is not yet available on HBO Max.
| Production | Tsuneo Takechi | Producer |
| Sound | Go Shiina | Original Music Composer |
| Sound | Naoya Tanaka | Sound Mixer |
| Visual Effects | Shinpei Tomooka | Key Animation |
| Sound | Hajime Takakuwa | Sound Director |
| Visual Effects | Masaru Kimura | Key Animation |
| Visual Effects | Shunya Kikuchi | Key Animation |
| Visual Effects | Tomonori Sudo | Key Animation |
| Visual Effects | Takuro Takahashi | Character Designer |
| Art | Takayuki Hirao | Storyboard Artist |
| Art | Kazuo Ebisawa | Background Designer |
| Visual Effects | Shinsuke Yasuda | Key Animation |
| Visual Effects | Ryunosuke Murakami | Key Animation |
| Production | Atsuhiro Iwakami | Producer |
| Visual Effects | Emi Chiba | Color Designer |
| Sound | Kenji Shibasaki | Sound Effects |
| Art | Kazuo Ebisawa | Art Direction |
| Art | Takamasa Nakakuki | Art Direction |
| Production | Junya Okamoto | Producer |
| Visual Effects | Yuichi Terao | 3D Animator |
| Visual Effects | Akio Shimotsukasa | Key Animation |
| Visual Effects | Yasutoshi Niwa | Key Animation |
| Editing | Kazumi Wakimoto | Assistant Editor |
| Art | Kiwami Hatta | Background Designer |
| Visual Effects | Kouji Aoki | Compositing Artist |
| Editing | Tsuyoshi Imai | Editor |
| Visual Effects | Atsushi Ogasawara | Key Animation |
| Art | Satoru Kuwabara | Art Direction |
| Directing | Takayuki Hirao | Second Unit Director |
| Visual Effects | Masayuki Kunihiro | Key Animation |
| Visual Effects | Masaharu Koyama | Key Animation |
| Visual Effects | Ryota Furukawa | Key Animation |
| Visual Effects | Yuya Kishi | Key Animation |
| Visual Effects | Yuka Honma | Key Animation |
| Visual Effects | Keita Shimizu | Key Animation |
| Visual Effects | Ryouichi Kaida | Key Animation |
| Visual Effects | Masaru Takeuchi | Key Animation |
| Visual Effects | Kazuki Nishiwaki | Compositing Artist |
| Visual Effects | Shinichi Igarashi | Compositing Artist |
| Visual Effects | Hiroyuki Uchida | Key Animation |
| Art | Shoko Araki | Background Designer |
| Visual Effects | Satoshi Takahashi | Key Animation |
| Visual Effects | Akihiko Uda | Key Animation |
| Visual Effects | Ato Nonaka | Key Animation |
| Visual Effects | Seiji Matsuda | Compositing Artist |
| Visual Effects | Momoko Toda | Compositing Artist |
| Visual Effects | Mitsuru Obunai | Key Animation |
| Visual Effects | Takeyoshi Omagari | Key Animation |
| Visual Effects | Sae Yoshikawa | Compositing Artist |
| Visual Effects | Takatsugu Umeda | Key Animation |
| Visual Effects | Tadashi Sugita | Key Animation |
| Visual Effects | Masato Takizawa | Compositing Artist |
| Visual Effects | Hiroaki Tanaka | Compositing Artist |
| Visual Effects | Tetsuto Ito | Key Animation |
| Visual Effects | Etsuko Kawano | Key Animation |
| Visual Effects | Katsuya Kikuchi | Key Animation |
| Directing | Kei Tsunematsu | Second Unit First Assistant Director |
| Art | Akiko Kazato | Background Designer |
| Visual Effects | Yuki Yamaguchi | 3D Animator |
| Visual Effects | Kenji Takehara | Compositing Artist |
| Visual Effects | Masato Takizawa | 3D Animator |
| Art | Michiko Morokuma | Background Designer |
| Art | Kim Min-ji | Background Designer |
| Art | Aki Inyama | Background Designer |
| Art | Yoshiko Kuroda | Background Designer |
| Art | Reimi Sonegawa | Background Designer |
| Art | Yuko Fukayama | Background Designer |
| Visual Effects | Katsuaki Kamata | Compositing Artist |
| Visual Effects | Dai Fukuyama | Key Animation |
| Art | Daisuke Yasuda | Background Designer |
| Visual Effects | Takuya Aoki | Key Animation |
| Visual Effects | Koji Odate | Key Animation |
| Art | Shinichi Igarashi | Assistant Director of Photography |
| Visual Effects | Takashi Suhara | Key Animation |
| Visual Effects | Toshiharu Kudou | Key Animation |
| Visual Effects | Makoto Nakamura | Key Animation |
| Art | Yuka Sanekata | Background Designer |
| Visual Effects | Yuki Yamaguchi | Compositing Artist |
| Camera | Yuichi Terao | Director of Photography |
| Production | Hikaru Kondo | Producer |
| Production | Ryu Suzuki | Line Producer |
| Sound | Yuji Akazawa | Sound Effects |
| Directing | Takayuki Hirao | Director |
| Writing | Akihiro Yoshida | Screenplay |
| Writing | Junji Ito | Novel |
| Writing | Takayuki Hirao | Screenplay |
