Lone Wolf and Cub: Sword of Vengeance (1972)

A wandering samurai, Ogami Itto, is hired as an assassin by a powerful samurai clan. After being framed for treason, he embarks on a quest for vengeance with his infant son, Daigoro, in tow. As they journey through feudal Japan, they encounter various enemies and allies, all while facing the challenges of maintaining their code of honor and protecting each other.