Raymond Burr
Steve Martin
Acting
Takashi Shimura
Dr. Yamane
Acting
Momoko Kôchi
Emiko Yamane
Acting
Akira Takarada
Ogata
Acting
Akihiko Hirata
Dr. Serizawa
Acting
Sachio Sakai
Hagiwara
Acting
Fuyuki Murakami
Dr. Tabata
Acting
Ren Yamamoto
Seiji
Acting
Toyoaki Suzuki
Shinkichi
Acting
Tadashi Okabe
Dr. Tabata's Assistant
Acting
Toranosuke Ogawa
President of Company
Acting
Frank Iwanaga
Security Officer Tomo Iwanaga
Acting
Sammee Tong
Dr. Yamane / Dr. Tabata (voice) (uncredited)
Acting
James Hong
Ogata / Dr. Serizawa / Hagiwara (voice) (uncredited)
Acting
Mikel Conrad
George Lawrence (uncredited)
Acting
Paul Frees
Unidentified Character (voice) (uncredited)
Acting
Hiroshi Hayashi
Chairman of Diet Committee (uncredited)
Acting
Ren Imaizumi
Radio Operator (uncredited)
Acting
Kokuten Kōdō
The Old Fisherman (uncredited)
Acting
Takeo Oikawa
Chief of Emergency Headquarters (uncredited)
Acting
Tsuruko Mano
The Boy's Mother (uncredited)
Acting
Kenji Sahara
Man on Boat (uncredited)
Acting
Kin Sugai
Ozawa-san (uncredited)
Acting
Lee Miller
Man in Line at Airport (uncredited)
Acting
Haruo Nakajima
Godzilla (uncredited)
Acting
Katsumi Tezuka
Godzilla (uncredited)
Acting
Ryosaku Takasugi
Godzilla (uncredited)
Acting