Lone Wolf & Cub
This epic series is, for me, one of the greatest achievements in comics. It tells the story of Itto Ogami, who starts as the official executioner for the Shogun. The rival Yagyu clan, who had wanted that high position for themselves, attack his family and leave fake evidence to discredit him. He leaves to walk meifumado, the “road to hell”: to work as a hired assassin in an attempt to amass sufficient resources for revenge.