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
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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 foreign gem, late night mood tags, 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.
foreign gemlate night
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.