Dr. Yuzo Mamiya
Akemi Togawa
Dr. Paul Stewart
General Hashimoto
Singer
Officer Hirai
Professor Kita
Chief Izumida
Lt. Col. Kazama
Saburo Kameda
General's Aide
Soldier
Defiant Reporter
Skeptical Reporter
Fisherman #1
Fisherman #2
Official
Dr. Paul Stewart (voice)
Gaira
Sanda
Adolescent Sanda
Adolescent Sanda (voice)
(uncredited)