Raymond Burr
Steve Martin
Toyoaki Suzuki
Shinkichi (as Tuyoaki Suzuki)
Akira Takarada
Ogata (as Akiro Takarata)
Akihiko Hirata
Dr. Serizawa
Frank Iwanaga
Security Officer (as Frank Iwaiga)
Sachio Sakai
Hagiwara
Takashi Shimura
Dr. Yamane
Momoko Kôchi
Emiko Yamane (as Momaku Kuchi)
Haruo Nakajima
Godzilla (uncredited)
Katsumi Tezuka
Godzilla (uncredited)
Raymond Royer
Unidentified Character (voice)
Michel François
Unidentified Character (voice)
Roland Ménard
Unidentified Character (voice)
Violette Jean
Unidentified Character (voice)
René Blancard
Unidentified Character (voice)
Maurice Favières
Unidentified Character (voice)
Dominique Rémy
Unidentified Character (voice)
Gérard Kérise
Unidentified Character (voice)
Louis Perdoux
Unidentified Character (voice)
Claude Dupuis
Unidentified Character (voice)
Eddy Rasimi
Unidentified Character (voice)