Kenji Sahara
Shigeru Kawamura (as Kenji Sawara)
Acting
Yumi Shirakawa
Kiyo
Acting
Akihiko Hirata
Dr. Kyuichiro Kashiwagi
Acting
Akio Kobori
Police Chief Nishimura
Acting
Yasuko Nakada
Female Honeymooner (as Yasuko Nakata)
Acting
Minosuke Yamada
Mining Director Osaki
Acting
Yoshifumi Tajima
Izeki
Acting
Seiji Onaka
Nakagawa, Male Honeymooner (as Kiyoharu Ohnaka)
Acting
Keye Luke
Shigeru Kawamura / Sunagawa / Police Officer Toji (voice) (uncredited)
Acting
Aya Oyama
Kiyo / Woman Outside Hospital / Female Honeymooner (voice) (uncredited)
Acting
George Takei
Dr. Kyuichiro Kashiwagi / Izeki / Male Honeymooner (voice) (uncredited)
Acting
Paul Frees
Police Chief Nishimura / Suda / Dr. Tanaka / Air Force Officer / Air Force Pilot Kitahara (voice) (uncredited)
Acting
Marvin Miller
Air Self-Defense Force Commander / Air Force Pilot / Newsreader (voice) (uncredited)
Acting
James Yagi
Osaki / Professor Minami / Hotel Manager / Farmer (voice) (uncredited)
Acting
Jane Chang
Otami (voice) (uncredited)
Acting
Art Gilmore
Narrator (voice) (uncredited)
Acting
Fay Wray
Screaming Woman in Crowd (voice) (archival) (uncredited)
Acting
Murray Spivack
Screaming Police Officers (voice) (archival) (uncredited)
Sound
Haruo Nakajima
Rodan / Meganulon (uncredited)
Acting
Katsumi Tezuka
Hotel Manager / Rodan / Meganulon (uncredited)
Acting
Shōichi Hirose
Fighter Pilot / Meganulon (uncredited)
Acting
Tokio Ôkawa
Meganulon (uncredited)
Acting