as Steve Martin

as Ogata

as Emiko Yamane (as Momoko Kochi)

as Dr. Serizawa

as Dr. Yamane

as Security Officer

as Ogata / Serizawa (voice) (uncredited)

as Hagiwara

as Dr. Tabata

as Seiji

as Shinkichi

as Dr. Tabata's Assistant

as President of Company

as George Lawrence (uncredited)

as Unidentified Character (voice) (uncredited)

as Chairman of Diet Committee (uncredited)

as Radio Operator (uncredited)

as Old Man on Hill on Oto Island (uncredited)

as Chief of Emergency Headquarters (uncredited)

as The Boy's Mother (uncredited)

as Man on Boat (uncredited)

as Ozawa-san (uncredited)

as Man in Line at Airport (uncredited)

as Godzilla (uncredited)

as Godzilla (uncredited)

as Godzilla (uncredited)

as Dr. Yamane (voice) (uncredited)