At the turn of the century, all of the Earth's monsters have been rounded up and kept safely on Monsterland. Chaos erupts when a race of she-aliens known as the Kilaaks unleash the monsters across the world.
Katsuo Yamabe
Akira Kubo
Dr. Yoshido
Jun Tazaki
Kyoko Manabe
Yukiko Kobayashi
Dr. Otani
Yoshio Tsuchiya
Ogata
Chōtarō Tōgin
General
Yoshifumi Tajima
Commander Nishikawa
Kenji Sahara
Engineer
Heihachirō Ōkawa
Kilaak Queen
Kyôko Ai
Dr. Stevenson
Andrew Hughes
Old Farmer
Ikio Sawamura
Young Scientist
Yoshio Katsube
Major Tada
Hisaya Ito
Police Officer
Yutaka Sada
Hospital Doctor
Hiroshi Okada
1st Reporter
Hideo Shibuya
1st Detective
Nadao Kirino
2nd Detective
Yutaka Oka
3rd Detective
Kamayuki Tsubono
SY-3 Engineer
Seishirō Kuno
Moon Base Employee
Ken'ichirō Maruyama
SY-3 Engineer
Kenzo Echigo
SY-3 Astronaut
Wataru Ōmae
SY-3 Astronaut
Naoya Kusakawa
Kilaak Controlled Staffer (uncredited)
Kazuo Suzuki
Kilaak Controlled Staffer (uncredited)
Tōru Ibuki
Kilaak Controlled Staffer (uncredited)
Susumu Kurobe
Kilaak Controlled Staffer (uncredited)
Minoru Itō
1st Officer (uncredited)
Rinsaku Ogata
2nd Officer (uncredited)
Haruya Sakamoto
Soldier (uncredited)
Yukihiko Gondō
Kilaak (uncredited)
Rei Maki
Officer Announcing Monsters' Arrival (uncredited)
Masaaki Tachibana
News Reader (uncredited)
Saburô Iketani
Kilaak (uncredited)
Atsuko Takahashi
Kilaak (uncredited)
Yoshio Miyata
Kilaak (uncredited)
Ari Segawa
Kilaak (uncredited)
Kyoko Mori
Kilaak (uncredited)
Midori Uchiyama
Kilaak (uncredited)
Wakako Tanabe
Kilaak (uncredited)
Michiko Ishii
Godzilla / Military Advisor
Haruo Nakajima
Anguirus
Hiroshi Sekita
Rodan
Teruo Nigaki
King Ghidorah
Susumu Utsumi
Minilla
Masao Fukazawa