The Straw Hat Pirates landed at Asuka Island, home of the most valuable sword in the world: The Seven Star Sword. Which was said to curse anyone who takes it in possession. When they got back to the Going Merry,
One Piece: Chopper's Kingdom on the Island of Strange Animals
One Piece 3D: Straw Hat Chase
One Piece: Baron Omatsuri and the Secret Island
One Piece: Giant Mecha Soldier of Karakuri Castle