Professor Kyuichiro Kashiwagi
Dr. Minakami (uncredited)
Professor Minami (uncredited)
Professor Isokawa (uncredited)
Policeman Tashiro (uncredited)
Imamura, F-86F pilot (uncredited)
Kitahara, F-86F pilot (uncredited)
Rodan / Meganulon / Hotel Manager
Meganulon / Fighter pilot
Policeman at crime laboratory
Sunagawa's colleague (uncredited)
Female Honeymooner (uncredited)
Kiyo's neighbor (uncredited)
Okinawan correspondent (uncredited)
Radio operator on jeep (uncredited)
Soldier in jeep (uncredited)
Nakagawa, male honeymooner