Rainbowman(1982)

Rainbowman is a Japanese science fiction series following Takeshi Yamato, a man who discovers the powers of the legendary Rainbow Warrior in India's remote mountains. Transformed by this extraordinary ability, Yamato becomes Rainbowman and takes on an alien invasion threatening Earth. The series blends action and adventure as the hero harnesses his newfound strength to defend humanity against extraterrestrial forces. With colorful transformation sequences and high-stakes battles, Rainbowman delivers classic tokusatsu entertainment that combines martial arts prowess with superhero spectacle.