One Piece "3D2Y": Overcome Ace's Death! Luffy's Vow to his Friends (2014)
- HD 1080
- Runtime: 105m.
- Status: Released
- 0
- Languages: ja
- Country: Japan
- Director: Naoyuki Ito
- Stars: Mayumi Tanaka, Kazuya Nakai, Akemi Okamura, Arata Furuta, Bin Shimada
- keywords: pirate, based on manga, shounen, anime
- Production_studio: Toei Animation, Toei Company
- providers: Netflix, Crunchyroll Amazon Channel, Netflix basic with Ads
- The One Piece "3D2Y": Overcome Ace's Death! Luffy's Vow to his Friends is featured in the top rankings of 2014
- #74 in Top Animation of 2014
The special takes place during the two year before the Straw Hats reunite on Sabody. Luffy is currently in Rusukaina training to get stronger to take on the New World. However the training is interrupted when Hancock's sisters, Marigold and Sandersonia, are kidnapped by the Byrnndi World, a pirate who was locked away on Level 6 of Impel Down but escaped during Luffy's invasion to save Ace, in order to lure Hancock to him and use her as a hostage against the World Government due to her Shichibukai status. Thus Luffy and Hancock head off to confront him and save Hancock's sisters.