Fist of the North Star(1984)

Hokuto no Ken

Nuclear war has devastated the planet, turning one fertile ground into a barren, inhospitable landscape on which mankind struggles desperately to stay alive. Society has collapsed and a fight for control wages between vicious dictators, super-powerful mutants, and biker gangs that terrorize the streets.

In a world so cruel and bleak, only the chosen one can restore civilization to its former self. Kenshiro - master of the Hokuto Shinken fighting technique; a martial art so awesomely brutal that only a single being can be entrusted with its full power!

(Source: Manga Entertainment)