Lone Wolf and Cub Omnibus, Volume 6 — Kazuo Koike

Separated from his son while battling Yagu assassins, Itto Ogami's mission of retribution heats to a boil as he cuts through any obstacle to find his missing child. But little Daigoro, though a mere toddler, is the son of the most formidable and resourceful samurai in the land. Though alone in a cruel world, Daigoro has the heart of a warrior!