as Steve Martin

as Dr. Yamane

as Emiko Yamane

as Ogata

as Dr. Serizawa

as Hagiwara

as Dr. Tabata

as Seiji

as Shinkichi

as Dr. Tabata's Assistant

as President of Company

as Security Officer Tomo Iwanaga

as Dr. Yamane / Dr. Tabata (voice) (uncredited)

as Ogata / Dr. Serizawa / Hagiwara (voice) (uncredited)

as George Lawrence (uncredited)

as Unidentified Character (voice) (uncredited)

as Chairman of Diet Committee (uncredited)

as Radio Operator (uncredited)

as The Old Fisherman (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)