One piece: Karakuri shiro no Mecha Kyohei 2006

Name: One piece: Karakuri shiro no Mecha Kyohei
Released: 2006-03-04
Cast: Mayumi Tanaka, Kazuya Nakai, Akemi Okamura, Kappei Yamaguchi, Hiroaki Hirata

Synopsis:

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
Written by:	Masahiro Ito
Release date:	2006-03-04
Runtime:	94 minutes
Related titles:	One Piece Film: Strong World 2009 One piece: Chinjou shima no chopper oukoku 2002 One Piece Film Z 2012