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.
| Sound | Kenji Shibasaki | Sound Effects |
| Sound | Naoya Tanaka | Sound Mixer |
| Art | Kazuo Ebisawa | Art Direction |
| Art | Kazuo Ebisawa | Background Designer |
| Art | Takamasa Nakakuki | Art Direction |
| Visual Effects | Shinpei Tomooka | Key Animation |
| Production | Atsuhiro Iwakami | Producer |
| Production | Tsuneo Takechi | Producer |
| Production | Junya Okamoto | Producer |
| Visual Effects | Takuro Takahashi | Character Designer |
| Visual Effects | Emi Chiba | Color Designer |
| Visual Effects | Yuichi Terao | 3D Animator |
| Art | Satoru Kuwabara | Art Direction |
| Editing | Tsuyoshi Imai | Editor |
| Sound | Go Shiina | Original Music Composer |
| Sound | Hajime Takakuwa | Sound Director |
| Art | Takayuki Hirao | Storyboard Artist |
| Directing | Takayuki Hirao | Second Unit Director |
| Visual Effects | Masayuki Kunihiro | Key Animation |
| Visual Effects | Masaru Kimura | Key Animation |
| Visual Effects | Akio Shimotsukasa | Key Animation |
| Visual Effects | Atsushi Ogasawara | Key Animation |
| Visual Effects | Shunya Kikuchi | Key Animation |
| Visual Effects | Shinsuke Yasuda | Key Animation |
| Visual Effects | Yuka Honma | Key Animation |
| Visual Effects | Keita Shimizu | Key Animation |
| Visual Effects | Ryunosuke Murakami | Key Animation |
| Visual Effects | Tomonori Sudo | Key Animation |
| Visual Effects | Takatsugu Umeda | Key Animation |
| Visual Effects | Takuya Aoki | Key Animation |
| Visual Effects | Masaharu Koyama | Key Animation |
| Visual Effects | Ryota Furukawa | Key Animation |
| Visual Effects | Dai Fukuyama | Key Animation |
| Visual Effects | Koji Odate | Key Animation |
| Visual Effects | Yasutoshi Niwa | Key Animation |
| Visual Effects | Takeyoshi Omagari | Key Animation |
| Visual Effects | Akihiko Uda | Key Animation |
| Visual Effects | Takashi Suhara | Key Animation |
| Visual Effects | Satoshi Takahashi | Key Animation |
| Visual Effects | Toshiharu Kudou | Key Animation |
| Visual Effects | Ryouichi Kaida | Key Animation |
| Visual Effects | Ato Nonaka | Key Animation |
| Visual Effects | Hiroyuki Uchida | Key Animation |
| Visual Effects | Yuya Kishi | Key Animation |
| Visual Effects | Tetsuto Ito | Key Animation |
| Visual Effects | Tadashi Sugita | Key Animation |
| Visual Effects | Etsuko Kawano | Key Animation |
| Visual Effects | Masaru Takeuchi | Key Animation |
| Visual Effects | Katsuya Kikuchi | Key Animation |
| Visual Effects | Makoto Nakamura | Key Animation |
| Visual Effects | Mitsuru Obunai | Key Animation |
| Directing | Kei Tsunematsu | Second Unit First Assistant Director |
| Art | Kim Min-ji | Background Designer |
| Art | Yuka Sanekata | Background Designer |
| Art | Aki Inyama | Background Designer |
| Art | Akiko Kazato | Background Designer |
| Art | Michiko Morokuma | Background Designer |
| Art | Yoshiko Kuroda | Background Designer |
| Art | Reimi Sonegawa | Background Designer |
| Visual Effects | Seiji Matsuda | Compositing Artist |
| Visual Effects | Sae Yoshikawa | Compositing Artist |
| Visual Effects | Momoko Toda | Compositing Artist |
| Visual Effects | Yuki Yamaguchi | Compositing Artist |
| Visual Effects | Yuki Yamaguchi | 3D Animator |
| Visual Effects | Masato Takizawa | Compositing Artist |
| Visual Effects | Masato Takizawa | 3D Animator |
| Visual Effects | Kazuki Nishiwaki | Compositing Artist |
| Visual Effects | Shinichi Igarashi | Compositing Artist |
| Art | Shinichi Igarashi | Assistant Director of Photography |
| Editing | Kazumi Wakimoto | Assistant Editor |
| Art | Daisuke Yasuda | Background Designer |
| Art | Yuko Fukayama | Background Designer |
| Art | Kiwami Hatta | Background Designer |
| Art | Shoko Araki | Background Designer |
| Visual Effects | Katsuaki Kamata | Compositing Artist |
| Visual Effects | Kouji Aoki | Compositing Artist |
| Visual Effects | Kenji Takehara | Compositing Artist |
| Visual Effects | Hiroaki Tanaka | 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 | Junji Ito | Novel |
| Writing | Akihiro Yoshida | Screenplay |
| Writing | Takayuki Hirao | Screenplay |
