Inventor Goro Ibuki creates a humanoid robot named Jet Jaguar. It is soon seized by an undersea race of people called the Seatopians. Using Jet Jaguar as a guide, the Seatopians send Megalon as vengeance for the nuclear tests that have devastated their society.
Cast
Katsuhiko Sasaki
Inventor Goro Ibuki
Yutaka Hayashi
Hiroshi Jinkawa
Hiroyuki Kawase
Rokuro 'Roku-chan' Ibuki
Kanta Mori
Japan Special Defense Forces Chief
Kotaro Tomita
Lead Seatopian Agent
Ulf Otsuki
Seatopian Agent
Sakyo Mikami
Truck Driver's Assistant
Fumiyo Ikeda
Man from Unit 1
Robert Dunham
Emperor Antonio of Seatopia
Gentaro Nakajima
Truck Driver
Ralph Jesser
Antonio's Aide (Radio Operator in White)
Shinji Takagi
Godzilla
Hideto Odachi
Megalon
Tsugutoshi Komada
Jet Jaguar
Masachika Mori
Jet Jaguar
Kenpachirō Satsuma
Gigan (as Kengo Nakayama)
Gorō Naya
Emperor Atonio of Seatopia (voice)
Eisuke Nakanishi
Narrator
Haruo Nakajima
Godzilla (archive footage) (uncredited)
Crew
Jun Fukuda
Director, Screenplay
Shinichi Sekizawa
Story, Lyricist
Michiko Ikeda
Editor
Yuzuru Aizawa
Director of Photography
Tsunesaburo Nishikawa
First Assistant Director
Eiichi Asada
Assistant Director
Yoshio Tabuchi
Assistant Director
Tomoyuki Tanaka
Producer
Shizuo Nakajima
Production Assistant
Yoshifumi Honda
Production Design
Tomoki Kobayashi
Assistant Costume Designer, Costume Design, Modeling
Nobuyuki Yasumaru
Costume Design, Modeling
Eishiro Hayashi
Sound Recordist
Masakuni Morimoto
Lighting Technician
Teruyoshi Nakano
Special Effects, Visual Effects Director, Visual Effects
Shoji Ogawa
Special Effects
Tadaaki Watanabe
Special Effects
Motoyoshi Tomioka
Special Effects, VFX Director of Photography
Kazunobu Sanpei
Visual Effects Compositor, Visual Effects
Toshiro Aoki
Visual Effects Art Director
Takeshi Miyanishi
Visual Effects
Riichirō Manabe
Original Music Composer
Keisuke Shinoda
Production Manager
Takeshi Kimura
Original Story
Masato Shimon
Vocals
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