A Japanese sci-fi from 1968. Aliens called the Virans attempt to conquer Earth by sending a spaceship named Spaceship One to attack it.
The film concerns Starman’s efforts to save the Earth from the followers of Balazar, an evil genius from the planet Zemar whose brain has been preserved after his own assassination
Atomic Rulers of the World (or just Atomic Rulers) is a 1964 film edited together for American television from films #1 and #2 of the Japanese short film series Super Giant.
A UFO takes two boys from Earth to another planet where they discover a race of people who can control giant monsters and have plans to take over the Earth. It’s up to Gamera to save the day.