A Japanese hero gains his power in the mountains of India and fights aliens with the color spectrum as his weapon. The show doesn't pretend to be anything other than what it is: a man in a suit throwing rainbow beams at invaders, and that commitment matters. There's no irony here, no winking at the audience. Just a warrior named Takeshi Yamato who transforms and wins because the formula works, because sometimes the simplest premise is the only honest one.
In the mountains of India, a man named Takeshi Yamato takes on the powers of the fabled Rainbow Warrior, which let him transform into Rainbowman. With these new abilities, his task is to keep an alien force from invading Earth. The 22-episode TV run from 1982 mixes action and adventure with science fiction and mecha elements.