Akira Takarada
Astronaut Kazuo Fuji
Astronauts Glenn and Fuji investigate Planet X and encounter mysterious aliens known as the Xiliens, who ask Earth's people to help save their world from "Monster Zero". In exchange for borrowing Godzilla and Rodan, the Xiliens offer a cure for cancer. As Glenn investigates, he develops a romance with Miss Namikawa and uncovers the Xilien's true intentions.
Kaijû daisensô
Astronaut Kazuo Fuji
Astronaut F. Glenn
Miss Namikawa
Haruno Fuji
Dr. Sakurai
Controller of Planet X
Tetsuo Torii
Chairman of Earth Committee
Medical Representative
Mobile Commander
President of World Education Corporation (Xilien)
Delegate
Religious Representative
Minister of Defense
Earth Base Xilien
Earth Base Xilien
Captain of First Survey Corps
Captain of Second Survey Corps
Women's Organization Representative
JSDF Soldier / Xilien
Director
