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