Katsuhiko Sasaki
Biologist Akira Ichinose
Tomoko Ai
Katsura Mafune
Akihiko Hirata
Dr. Shinzô Mafune
Katsumasa Uchida
Jiro Murakoshi
Gorō Mutsumi
Mugal
Tadao Nakamaru
Interpol Chief Tagawa
Shin Roppongi
Yûuchi Wakayama
Yasuko Agrawa
Yuri Yamamoto
Tôru Ibuki
Tsuda (Bearded alien)
Kenji Sahara
Defense Force Commander
Kotaro Tomita
Professor Ôta
Ikio Sawamura
Mafune's Butler
Masaaki Daimon
Captain Kusakari
Kazuo Suzuki
Alien Henchman #1
Yoshio Kirishima
Alien Henchman #2
Masayoshi Kikuchi
Alien Henchman #3
Takuya Yuki
Alien Henchman #4
Jun Nishihara
Alien Henchman #5
Akinori Umezu
Boy #1
Shizuko Azuma
Old Country Lady
Toshihiko Furuta
Interpol Worker
Takuzō Kumagai
Defense Corp Executive
Toru Kawai
Godzilla
Ise Mori
Mechagodzilla
Tatsumi Nikamoto
Titanosaurus