Ishirô Honda Director Katsuhiko Sasaki Biologist Akira Ichinose Actor Tomoko Ai Katsura Mafune Actor Akihiko Hirata Dr. Shinzô Mafune Actor Katsumasa Uchida Interpol Agent Jiro Murakoshi Actor Gorô Mutsumi Alien Leader Mugal Actor Kenji Sahara Army Commander Segawa Actor Tomoe Mari Yuri Yamamoto Actor Shin Roppongi Yûichi Wakayama Actor Tadao Nakamaru Interpol Chief Tagawa Actor Kotaro Tomita Professor Ôta Actor Ikio Sawamura Mafune's Silent Butler Actor Kazuo Suzuki Alien Henchman 1 Actor Yoshio Kirishina Alien Henchman 2 Actor Toru Kawai Gojira Actor Ise Mori Mekagojira 2 Actor Katsumi Nimiamoto Chitanozaurusu Actor Masayoshi Kikuchi Alien Henchman 3 Actor Shizuko Higashi Old Country Lady Actor Yukiko Takayama Screenwriter Henry G. Saperstein Executive Producer Tomoyuki Tanaka Executive Producer Sokei Tomioka Cinematographer Yoshitami Kuroiwa Film Editing Akira Ifukube Original Music