Kaijû sôshingeki (1968)

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.

Directed by: Ishirō Honda

Starring: Akira Kubo, Jun Tazaki, Yukiko Kobayashi, Yoshio Tsuchiya, Chōtarō Tōgin, Yoshifumi Tajima

Links: IMDb, Movie posters, Movie stills