Fumio Sudo was the Park overseer at World Children's Land. He is first seen speaking in his office with film protagonist Gengo Kotaka about the park. Fumio's associate Kubota comes in to tell Fumio that a tape recording with plans for the park has been stolen. Fumio assures Kotaka that they can work without the tape, by switching the order of some of their plans. He then goes to a computer to ask the M Space Hunter Nebula Aliens High Command for permission to change the plan, as the plan has nothing to do with the park, but their plan is to destroy the humans. After great interference by the film's protagonists, Fumio is forced to commence with his plan early and call in King Ghidorah and Gigan to destroy the humans. The protagonists are soon captured and brought to Fumio, who explains who they are, and tells them that they will be used as "suits" for other M Space Hunter Nebula Aliens. Godzilla and Anguirus begin to attack their base in Godzilla Tower and Fumio is forced to fire a laser from the Godzilla replica's mouth. Fumio and Kotaka are defeated, and killed in an explosion.