Akira Kubo as Katsuo Yamabe

Jun Tazaki as Dr. Yoshido

Yukiko Kobayashi as Kyoko Manabe

Yoshio Tsuchiya as Dr. Otani

Chōtarō Tōgin as Ogata

Yoshifumi Tajima as General

Kenji Sahara as Commander Nishikawa

Heihachirō Ōkawa as Engineer

Kyôko Ai as Kilaak Queen

Andrew Hughes as Dr. Stevenson

Ikio Sawamura as Old Farmer

Yoshio Katsube as Young Scientist

Hisaya Ito as Major Tada

Yutaka Sada as Police Officer

Hiroshi Okada as Hospital Doctor

Hideo Shibuya as 1st Reporter

Nadao Kirino as 1st Detective

Yutaka Oka as 2nd Detective

Kamayuki Tsubono as 3rd Detective

Seishirō Kuno as SY-3 Engineer

Ken'ichirō Maruyama as Moon Base Employee

Kenzo Echigo as SY-3 Engineer

Wataru Ōmae as SY-3 Astronaut

Naoya Kusakawa as SY-3 Astronaut

Kazuo Suzuki as Kilaak Controlled Staffer (uncredited)

Tōru Ibuki as Kilaak Controlled Staffer (uncredited)

Susumu Kurobe as Kilaak Controlled Staffer (uncredited)

Minoru Itō as Kilaak Controlled Staffer (uncredited)

Rinsaku Ogata as 1st Officer (uncredited)

Haruya Sakamoto as 2nd Officer (uncredited)

Yukihiko Gondō as Soldier (uncredited)

Rei Maki as Kilaak (uncredited)

Masaaki Tachibana as Officer Announcing Monsters' Arrival (uncredited)

Saburô Iketani as News Reader (uncredited)

Atsuko Takahashi as Kilaak (uncredited)

Yoshio Miyata as Kilaak (uncredited)

Ari Segawa as Kilaak (uncredited)

Kyoko Mori as Kilaak (uncredited)

Midori Uchiyama as Kilaak (uncredited)

Wakako Tanabe as Kilaak (uncredited)

Michiko Ishii as Kilaak (uncredited)

Haruo Nakajima as Godzilla / Military Advisor

Yû Sekita as Anguirus

Teruo Nigaki as Rodan

Susumu Utsumi as King Ghidorah

Masao Fukazawa as Minilla