Top Billed Cast

1. 

   Hiroshi Koizumi

   Tsukioka

2. 

   Setsuko Wakayama

   Hidemi

3. 

   Minoru Chiaki

   Kobayashi (as Mindru Chiaki)

4. 

   Takashi Shimura

   Dr. Yamane

5. 

   Masao Shimizu

   Dr. Tadokoro

6. 

   Seijirô Onda

   Commander (as Serjiro Onda)

7. 

   Sonosuke Sawamura

   Shibeki

8. 

   Yoshio Tsuchiya

   Tajima

9. 

   Mayuri Mokushô

   Radio Operator

10. 

    Yukio Kasama

    Father (as Yokio Kasama)

11. 

    Takeo Oikawa

    Police Chief

12. 

    Minosuke Yamada

    Chief of Civil Defense (uncredited)

13. 

    Ren Yamamoto

    Ikeda (uncredited)

14. 

    Shin Ōtomo

    Convict Leader (uncredited)

15. 

    Senkichi Ōmura

    Convict (uncredited)

16. 

    Haruo Nakajima

    Gigantis (uncredited)

17. 

    Katsumi Tezuka

    Angurus (uncredited)

18. 

    Shōichi Hirose

    Convict (uncredited)

19. 

    Keye Luke

    Tsukioka / Policeman (voice) (uncredited)

20. 

    Aya Oyama

    Hidemi (voice) (uncredited)

21. 

    Marvin Miller

    Kobayashi / Dr. Yamane / Narrator (voice) (uncredited)

22. 

    Paul Frees

    Commander / Father / Convict (voice) (uncredited)

23. 

    George Takei

    Ikeda / Osaka SDF Dispatcher (voice) (uncredited)

24. 

    Jane Chang

    Radio Operator (voice) (uncredited)

25. 

    James Yagi

    Osaka SDF Captain (voice) (uncredited)