If you loved Detective Conan: Black Iron Submarine, try Case Closed: Countdown to Heaven
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

Detective Conan: Black Iron Submarine
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Case Closed: Countdown to Heaven
What they share
Theysit in Action / Animation / Crime / Mystery territory. If that's the register that drew you to Detective Conan: Black Iron Submarine, the second film will land in a comparable space — through a different lens.
What Case Closed: Countdown to Heaven is
Tokyo twilight, neon hums from half-built towers. A crane’s metal groan shadows the skyline as bodies drop from each ascending floor. The killer ascends, Conan climbs down.