Raymond Burr
Steve Martin
Akira Takarada
Ogata
Akihiko Hirata
Dr. Serizawa
Takashi Shimura
Dr. Yamane
Momoko Kôchi
Emiko Yamane
Emilio Cigoli
Steve Martin (voice)
Rita Savagnone
Emiko Yamane (voice)
Giuseppe Rinaldi
Ogata (voice)
Vittorio Cramer
George Lawrence (voice) (as Vittorio Kramer)
Pino Locchi
Security Officer Tomo Iwanaga (voice)
Gianfranco Bellini
Dr. Serizawa (voice) (uncredited)
Bruno Persa
Dr. Yamane (voice) (uncredited)
Sachio Sakai
Hagiwara (uncredited)
Fuyuki Murakami
Dr. Tabata (uncredited)
