Written by the team of Tatsuo Tamura and Toyohiro Andô and brought to the small screen by Knack Productions, Astroganger ran for 26 episodes from 1972 to 1973.
The plot follows Maya, an alien woman who crash-lands on Earth. She reveals that her home planet was destroyed by the Blasters, a cruel alien race who are out to steal natural resources from other planets.
Maya falls in love with a scientist named Dr. Hoshi (voiced by Hisashi Katsuta) and gives birth to a human boy named Kantaro Hoshi (voiced by Kazuko Sawada). When the Blasters invade the Earth, Kantaro must defeat them by fighting with Astroganger (voiced by Shōzō Iizuka) – a robot made from living metal!