One Piece: Giant Mecha Soldier of Karakuri Castle

The Straw Hats visits an island, known as Mecha Island, where a fisherman sings an old folk song about a Golden Crown. Searching for that mysterious treasure, they find a hidden entrance into the island. The island's leader, Ratchet, impressed with the find and in search of the Golden Crown himself, invites the crew to join him in his search and the crew along with Ratchet and his henchmen enter the cave. As it turns out, the islands true form, is that of a giant turtle. Ratchet, who had known this all along, uses his mechanical castle to take control of the turtle, in order to use it, to take over the world. Now the Straw Hats have to stop not only Ratchet, but also the helpless turtle, from crashing into a nearby island.

Directed by Konosuke Uda, One Piece: Giant Mecha Soldier of Karakuri Castle leans on a strong ensemble — Mayumi Tanaka, Kazuya Nakai, Akemi Okamura — to carry a story that balances spectacle with character.

The film landed with audiences for its craft and performances, and remains one of the most talked-about animation titles of 2006.