Raymond Burr
Steve Martin
Acting
Akira Takarada
Ogata
Acting
Akihiko Hirata
Dr. Serizawa
Acting
Takashi Shimura
Dr. Yamane
Acting
Momoko Kôchi
Emiko Yamane
Acting
Emilio Cigoli
Steve Martin (voice)
Acting
Rita Savagnone
Emiko Yamane (voice)
Acting
Giuseppe Rinaldi
Ogata (voice)
Acting
Vittorio Cramer
George Lawrence (voice) (as Vittorio Kramer)
Acting
Pino Locchi
Security Officer Tomo Iwanaga (voice)
Acting
Sachio Sakai
Hagiwara (uncredited)
Acting
Fuyuki Murakami
Dr. Tabata (uncredited)
Acting
Ren Yamamoto
Seiji (uncredited)
Acting
Toyoaki Suzuki
Shinkichi (uncredited)
Acting
Tadashi Okabe
Dr. Tabata's Assistant (uncredited)
Acting
Toranosuke Ogawa
President of Company (uncredited)
Acting
Frank Iwanaga
Security Officer Tomo Iwanaga (uncredited)
Acting
Mikel Conrad
George Lawrence (uncredited)
Acting
Kokuten Kōdō
The Old Fisherman (uncredited)
Acting
Kenji Sahara
Man on Boat (uncredited)
Acting
Haruo Nakajima
Godzilla (uncredited)
Acting
Katsumi Tezuka
Godzilla (uncredited)
Acting