If you loved One Piece Episode of Merry: The Tale of One More Friend, try One Piece Episode of Nami: Tears of a Navigator and the Bonds of Friends
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.

One Piece Episode of Merry: The Tale of One More Friend

One Piece Episode of Nami: Tears of a Navigator and the Bonds of Friends
What they share
Both films are directed by Katsumi Tokoro, and they both carry the tender mood tag, and they sit in Action / Adventure / Animation / Comedy / Fantasy / TV Movie territory. If that's the register that drew you to One Piece Episode of Merry: The Tale of One More Friend, the second film will land in a comparable space — through a different lens.
What One Piece Episode of Nami: Tears of a Navigator and the Bonds of Friends is
Nami’s personal saga gets the localized spotlight, which, predictably, involves storm clouds and stolen ships. The crew pursues her to her flooded hometown where Arlong’s reign drowns the joy out of maritime maps. Loyalty, like tides, occasionally gets pulled under too.