Jun Hashizume as Lieutenant Koji Shinjo

Megumi Odaka as Miki Saegusa

Zenkichi Yoneyama as Lieutenant Kiyoshi Sato

Akira Nakao as Colonel Takaaki Aso

Yousuke Saito as Dr. Susumu Okubo

Koichi Ueda as Deputy Commander Hyodo

Kenji Sahara as Minister Takayuki Segawa

Towako Yoshikawa as Dr. Chinatsu Gondo

Akira Emoto as Major Akira Yuki

Keiko Imamura as Cosmos

Sayaka Osawa as Cosmos

Kenpachirō Satsuma as Godzilla

Ryo Hariya as SpaceGodzilla

Wataru Fukuda as M.O.G.U.E.R.A.

Little Franky as Little Godzilla

Houka Kinoshita as Moguera Pilot

Toru Minegishi as Colonel Goro Gondo (archival footage) (uncredited)