If you loved Hanzo the Razor: Sword of Justice, try Lone Wolf and Cub: Sword of Vengeance
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

Hanzo the Razor: Sword of Justice
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Lone Wolf and Cub: Sword of Vengeance
What they share
Both films are directed by Kenji Misumi, and they both carry the raw mood tag, and they sit in Action / Drama territory. If that's the register that drew you to Hanzo the Razor: Sword of Justice, the second film will land in a comparable space — through a different lens.
raw
What Lone Wolf and Cub: Sword of Vengeance is
Road to Edo. Winter wind. A gate creaks. Disgraced, a samurai wanders the countryside as an assassin, pushing a perambulator holding his toddler and a cache of deadly weapons. The shogun's forces hunt them. Violent, beautiful, and strange, this is among the most influential samurai films ever.