If you loved Lupin the Third vs. Detective Conan, try Lupin the Third: Seven Days Rhapsody
A bridge between a film you've already seen and one most people haven't. Lupin the Third: Seven Days Rhapsody has roughly 4.9× fewer votes than Lupin the Third vs. Detective Conan — 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.

Lupin the Third vs. Detective Conan

Lupin the Third: Seven Days Rhapsody
What they share
Both films are directed by Hajime Kamegaki, and they both carry the neon soaked, outsider, playful mood tags, and they sit in Action / Animation / Comedy / Crime / TV Movie territory. If that's the register that drew you to Lupin the Third vs. Detective Conan, the second film will land in a comparable space — through a different lens.
What Lupin the Third: Seven Days Rhapsody is
A gentleman thief’s seven-day diamond caper hits a snag when he pulls a damsel from ruffians—only for her wealthy father to weaponize nostalgia and mercenary muscle. Jigen faces a guilt-trip he can’t outrun while Goemon answers a different employer entirely. Good luck keeping a crew together when everyone’s got a price and a timetable.