Lone Wolf and Cub: Baby Cart at the River Styx (1972) on Netflix

Plot summary

Ogami Itto, once the shogun's executioner, now roams the countryside as a hired killer with his three-year-old son Daigoro, pushing the boy in a baby cart. The Kurokawa spy clan watches his movements and reports to Sayaka, commander of the Akari Yagyu female assassins. An indigo-dye clan hires Itto to kill one of its members, who plans to sell the clan's secret process to the shogun. The turncoat travels with the three Hidari brothers, whose weapons are an iron claw, a flying mace and armored gloves. On the road, women of Sayaka's clan come at Itto in disguise, posing as acrobats, as travelers whose straw hats hide blades, and as vegetable washers by a river.