List of One Piece television specials

The One Piece anime series, based on the manga of same name, has spawned thirteen television specials that aired on Fuji TV. Of these specials, the first four, as well as the sixth, eighth, tenth and eleventh are original stories created by the anime staff, while the fifth, seventh, ninth, twelfth and thirteenth specials are alternate re-tellings of certain story arcs. On April 7, 2013, a two-part hour-long crossover TV special, between Dragon Ball Z, One Piece and Toriko, referred to as Dream 9 Toriko x One Piece x Dragon Ball Z Super Collaboration Special!!

Source: Wikipedia — List of One Piece television specials (CC BY-SA 4.0)