If you loved BLACKFOX: Age of the Ninja, try Kamen Rider W Forever: A to Z/The Gaia Memories of Fate
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

BLACKFOX: Age of the Ninja
→
Try this next

Kamen Rider W Forever: A to Z/The Gaia Memories of Fate
What they share
Both films are directed by Koichi Sakamoto, and they both carry the playful mood tag, and they sit in Action / Adventure territory. If that's the register that drew you to BLACKFOX: Age of the Ninja, the second film will land in a comparable space — through a different lens.
playful
What Kamen Rider W Forever: A to Z/The Gaia Memories of Fate is
You race through neon-soaked Fuuto as a rogue NEVER strike force hijacks the T2 Gaia Memory shipment. Then the final boss arrives wearing a lost driver that folds space into a new Rider suit. The director stages these combats like speed-punk dioramas you can’t pause.