A prehistoric monster called Gigantis emerges alongside another creature named Angurus.
as Tsukioka
as Hidemi
as Kobayashi (as Mindru Chiaki)
as Dr. Yamane
as Dr. Tadokoro
as Commander (as Serjiro Onda)
as Shibeki
as Tajima
as Radio Operator
as Father (as Yokio Kasama)
as Police Chief
as Chief of Civil Defense (uncredited)
as Ikeda (uncredited)
as Convict Leader (uncredited)
as Convict (uncredited)
as Gigantis (uncredited)
as Angurus (uncredited)
as Convict (uncredited)
as Tsukioka / Policeman (voice) (uncredited)
as Hidemi (voice) (uncredited)
as Kobayashi / Dr. Yamane / Narrator (voice) (uncredited)
as Commander / Father / Convict (voice) (uncredited)
as Ikeda / Osaka SDF Dispatcher (voice) (uncredited)
as Radio Operator (voice) (uncredited)
as Osaka SDF Captain (voice) (uncredited)
