If you loved The Case of Hana & Alice, try Detective Conan: Episode One - The Great Detective Turned Small
A bridge between a film you've already seen and one most people haven't. Detective Conan: Episode One - The Great Detective Turned Small has roughly 4.8× fewer votes than The Case of Hana & Alice — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.

The Case of Hana & Alice

Detective Conan: Episode One - The Great Detective Turned Small
What they share
Theyboth carry the bittersweet, cozy, foreign gem mood tags, and they sit in Animation / Comedy / Mystery territory. If that's the register that drew you to The Case of Hana & Alice, the second film will land in a comparable space — through a different lens.
What Detective Conan: Episode One - The Great Detective Turned Small is
Amid spring’s cherry blossoms, a brass lighter clicks shut. A teen sleuth fails to light one; the bomber laughs, then vanishes. Kid Conan’s case begins in 2017 Shōnen Sunday flashback mode.