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