If you loved Shinobi No Mono 5: Return of Mist Saizo, try Zatoichi and the Chest of Gold
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

Shinobi No Mono 5: Return of Mist Saizo
→
Try this next

Zatoichi and the Chest of Gold
What they share
Both films are directed by Kazuo Ikehiro, and they both carry the outsider mood tag, and they sit in Action / Adventure / Drama territory. If that's the register that drew you to Shinobi No Mono 5: Return of Mist Saizo, the second film will land in a comparable space — through a different lens.
outsider
What Zatoichi and the Chest of Gold is
You visit a grave two years late and see your name carved there in someone else's hand. Suspicion lands on you as tax gold vanishes en route to the governor. The sword you carry has no scabbard left for your shame.