If you loved The Tale of Zatoichi, try Lone Wolf and Cub: Baby Cart at the River Styx
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
You already loved

The Tale of Zatoichi
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Lone Wolf and Cub: Baby Cart at the River Styx
What they share
Both films are directed by Kenji Misumi, and they both carry the foreign gem mood tag, and they sit in Action / Adventure / Drama territory. If that's the register that drew you to The Tale of Zatoichi, the second film will land in a comparable space — through a different lens.
foreign gem
What Lone Wolf and Cub: Baby Cart at the River Styx is
Snowy forest. A single red maple leaf. Father and son fording a stream. The ronin Ogami Itto, formerly the Shogun's decapitator, now pushes a weaponized baby cart through hell, blades flashing. Enemies multiply. Seventies samurai action rarely cuts this deep.