Invasion of the Neptune Men

Invasion of the Neptune Men , Uch Kaisokusen? is a 1961 superhero film produced by Toei Company Ltd.. The film stars Sonny Chiba in his second feature film.

Astronomer Shinichi Tachibana, has a secret identity as superhero Iron Sharp changed to Space Chief in the English dub and has many children as friends. When they are attacked by a group of metallic aliens Neptune Men in English, Iron Sharp drives the aliens away. Tachibana is also resourceful, as he helps develop an electric barrier to block the aliens from coming to the Earth. After several losses by the aliens, they announce that they will invade the Earth, throwing the world into a state of panic. As they invade the aliens destroy entire cities with their mothership and smaller fighters. Iron Sharp destroys multiple enemy ships and Japan fires a nuclear missile at the mothership, destroying it.Invasion of the Neptune Men was an early feature film for Sonny Chiba. Chiba career started working in Japanese television where he starred in superhero television series in 1960. Chiba continuted working back and forth between television in film until the late 1960s when he became a more popular star. ........

Source: Wikipedia