If you loved The Cat Returns, try One Piece: Episode of Luffy - Hand Island Adventure
A bridge between a film you've already seen and one most people haven't. One Piece: Episode of Luffy - Hand Island Adventure has roughly 42.0× fewer votes than The Cat Returns — 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 Cat Returns

One Piece: Episode of Luffy - Hand Island Adventure
What they share
Both films are directed by Hiroyuki Morita, and they both carry the atmospheric, cozy, foreign gem mood tags, and they sit in Adventure / Animation / Fantasy territory. If that's the register that drew you to The Cat Returns, the second film will land in a comparable space — through a different lens.
What One Piece: Episode of Luffy - Hand Island Adventure is
Here we have a TV movie that dares to ask: what if One Piece, but shorter? After a run-in with the Marines, the Straw Hats land on Hand Island and tangle with a wax sculptor and his shady business partner. It's a perfectly serviceable way to kill an hour.