If you loved The Old Man and the Sea, try Detective Conan: The Last Wizard of the Century
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

The Old Man and the Sea
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Detective Conan: The Last Wizard of the Century
What they share
Theyboth carry the foreign gem mood tag, and they sit in Adventure / Animation / Drama territory. If that's the register that drew you to The Old Man and the Sea, the second film will land in a comparable space — through a different lens.
foreign gem
What Detective Conan: The Last Wizard of the Century is
Osaka, night. A calling card in the shape of a bird. The phantom thief Kid announces his next target: a Romanov Easter egg of immense value. Conan and a colorful cast of detectives converge, each with their own theories about the egg's hidden secrets. A solid entry in a long-running anime procedural.