Raymond Burr

Steve Martin

Toyoaki Suzuki

Shinkichi (as Tuyoaki Suzuki)

Frank Iwanaga

Security Officer Tomo Iwanaga (as Frank Iwaiga)

宝田明

Ogata (as Akiro Takarata)

平田昭彦

Dr. Serizawa

Sachio Sakai

Hagiwara

Takashi Shimura

Dr. Yamane

河内桃子

Emiko Yamane (as Momaku Kuchi)

村上冬樹

Dr. Tabata (uncredited)

山本廉

Seiji (uncredited)

Mikel Conrad

George Lawrence (uncredited)

小川虎之助

President of Company (uncredited)

岡部正

Dr. Tabata's Assistant (uncredited)

Kokuten Kōdō

The Old Fisherman (uncredited)

佐原健二

Man on Boat (uncredited)

Haruo Nakajima

Godzilla (uncredited)

手塚 勝巳

Godzilla (uncredited)

Raymond Royer

Unidentified Character (voice)

Michel François

Unidentified Character (voice)

Roland Ménard

Unidentified Character (voice)

Violette Jean

Unidentified Character (voice)

René Blancard

Unidentified Character (voice)

Maurice Favières

Unidentified Character (voice)

Dominique Rémy

Unidentified Character (voice)

Gérard Kérise

Unidentified Character (voice)

Louis Perdoux

Unidentified Character (voice)

Claude Dupuis

Unidentified Character (voice)

Eddy Rasimi

Unidentified Character (voice)

堤康久

Odo Islander (uncredited)

越後憲

Sailor playing harmonica on Eiko Maru (uncredited)

篠原正記

Eiko Maru crewmember (uncredited)

藤木悠

Eiko Maru wireless communications officer (uncredited)

Tokio Ôkawa

Male family member of missing sailors (uncredited)

Ishirō Honda

Substation worker (uncredited)

Shōichi Hirose

Representative (uncredited)

Haruya Sakamoto

Newspaper reporter on Shikine (uncredited)

宇留木康二

Assistant to announcer on Shikine (uncredited)