If you loved Miyamoto Musashi IV: The Duel at Ichijo-ji Temple, try Miyamoto Musashi III: Birth of Two Sword Style
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

Miyamoto Musashi IV: The Duel at Ichijo-ji Temple
→
Try this next

Miyamoto Musashi III: Birth of Two Sword Style
What they share
Both films are directed by Tomu Uchida, and they sit in Action / Drama / History territory. If that's the register that drew you to Miyamoto Musashi IV: The Duel at Ichijo-ji Temple, the second film will land in a comparable space — through a different lens.
What Miyamoto Musashi III: Birth of Two Sword Style is
You fight in feudal Japan and then a rival emerges. Miyamoto Musashi faces his greatest challenge yet.