Dr. Minakami (uncredited)
Kiyoshi Takagi
Professor Minami (uncredited)
Fuyuki Murakami
Professor Isokawa (uncredited)
Mitsuo Matsumoto
Policeman Tashiro (uncredited)
Takuzō Kumagai
Imamura, F-86F pilot (uncredited)
Yasuhisa Tsutsumi
Kitahara, F-86F pilot (uncredited)
Yutaka Oka
F-86F pilot (uncredited)
Shigemi Sunagawa
Rodan / Meganulon / Hotel Manager
Katsumi Tezuka
Rodan / Meganulon
Haruo Nakajima
Meganulon / Fighter pilot
Shôichi Hirose
Sunagawa's colleague (uncredited)
Saburô Kadowaki