Also known as "The Baby Cart Series" I've watched these a few times. On my own, then shared them with the boy, now it's the daughter's turn.
I love these movies. 6 in total: Set in Japan about a Samurai turned Assassin - Ogami Ittō - who must bide his time wandering the countryside with his son Daigorō awaiting to avenge himself upon the corrupt Shogunate that have forced him into these circumstances, it's the inspiration behind a lot of Tarantino's films.