If you loved Kamen Rider: THE FIRST, try Kamen Rider Den-O The Movie: I'm Born!
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.
What they share
Both films are directed by Takao Nagaishi, and they both carry the playful mood tag, and they sit in Action / Adventure / Science Fiction territory. If that's the register that drew you to Kamen Rider: THE FIRST, the second film will land in a comparable space — through a different lens.
playful
What Kamen Rider Den-O The Movie: I'm Born! is
You steer a bullet train across time and your childhood self won’t remember the mission. Then the villain hijacks the tracks. In 2000 you vanish, and the past threatens to erase the future. Nagaishi stages stunts inside a moving train, so every crash feels like déjà vu.

