Steve Martin

Ogata

Dr. Serizawa

Dr. Yamane

Emiko Yamane

Steve Martin (voice)

Emiko Yamane (voice)

Ogata (voice)

George Lawrence (voice) (as Vittorio Kramer)

Security Officer Tomo Iwanaga (voice)

Hagiwara (uncredited)

Dr. Tabata (uncredited)

Seiji (uncredited)

Shinkichi (uncredited)

Dr. Tabata's Assistant (uncredited)

President of Company (uncredited)

Security Officer Tomo Iwanaga (uncredited)

George Lawrence (uncredited)

The Old Fisherman (uncredited)

Man on Boat (uncredited)

Godzilla (uncredited)