Buronson

In the original classic manga set in a postapocalyptic wasteland ruled by savage gangs, a hero appears to bring justice to the guilty. This warrior named Ken holds the deadly secrets of a mysterious martial art known as Hokuto Shinken—the Divine Fist of the North Star! In a postapocalyptic world, humanity has risen from the ashes of nuclear war, but only to a nightmare of endless suffering. It is a time of chaos. Gangs of savage marauders and warlords rule the broken ruins of civilization, terrorizing and enslaving the survivors. Life has become a brutal struggle for existence and death the only release. One day, a wanderer appears out of the wasteland to bring justice to the guilty and hope for the people—a warrior named Ken who bears seven scars upon his chest and holds the deadly secrets of a mysterious martial art known as Hokuto Shinken—the Divine Fist of the North Star!

Books like Fist of the North Star, Vol. 1

Your next favorite book is out there