Astroganger

Astroganger (1972) is a animation, sci-fi & fantasy, action & adventure with 1 season created by Tetsuhisa Suzukawa, rated 5.0/10.

An alien woman named Maya crash-lands on Earth. Her homeworld was destroyed by the Blasters, a cruel alien race who steals the natural resources from other planets. She falls in love with a scientist and gives birth to a human boy named Kentaro. When the Blasters invade the Earth, Kentaro must defeat them by fighting with Astroganger, a robot made from living metal.