One Piece: Episode of Luffy - Hand Island Adventure
One Piece: Episode of Luffy - Hand Island no Bouken
The story of the Hand Island no Bouken special is set a little before the events of One Piece Film Z and depicts a major "Hand Island" incident during the New World storyline. The story is set at "Cannon Town" where a parent and a child work as craftspeople. The incident revolves around them and a commodore of a marine base. The special will also have a flashback scene to the story in the first chapter of the manga, but with new animation. (Source: ANN)
Seasons
One Piece Special: Adventure in the Ocean's Navel
One Piece Special: Open Upon the Great Sea! A Father's Huge, HUGE Dream!
One Piece Special: Protect! The Last Great Performance
One Piece Special: The Detective Memoirs of Chief Straw Hat Luffy
One Piece: Episode of Nami - Tears of a Navigator and the Bonds of Friends
One Piece: Episode of Luffy - Hand Island Adventure
One Piece: Episode of Merry - The Tale of One More Friend
One Piece 3D2Y: 15th Anniversary
One Piece: Episode of Sabo - The Three Brothers' Bond
One Piece: Adventure of Nebulandia
One Piece: Heart of Gold
One Piece: Episode of East Blue
One Piece: Episode of Skypiea
One Piece: Barto's Secret Room