The name of One Piece was as follows: 1 One Piece: The Party (Theatrical One Piece: Celebration) 2. Theatrical One Piece: The Sea of Seven Kings (Theatrical One Piece: Treasures of the Seven Kingdoms) 3. One Piece: The City of Gold (One Piece: Island of Gold) 4. One Piece: World of Water (One Piece: World of Water: The Great Secret Treasure) 5. One Piece: The Secret of the Demon Man (One Piece: The Demon Man-The Cursed Ship) 6. One Piece: Legend of the Headless Horseman (One Piece: Legend of the Headless Horseman) 7. One Piece: The Dream of the Sea Princess (One Piece: The Dream of the Sea Princess: The Adventure of the Treasure) 8. One Piece:One Piece: The Age of the Great Voyage 4: The Prince at the End of the World 9 One Piece: The Strongest Enemy (One Piece: The Strongest Enemy-King of the Sea) 10 One Piece: Soul's Link (One Piece: Soul's Link-Lost Continent)