Template:April 4


 * 2001: Volume 18 "Introducing Ace" was published in Japan.
 * 2002: Volume 23 "Vivi's Adventure" was published in Japan.
 * 2004: Episode 189 "Eternal Friendship! The Bell of Oath Echoes Throughout the Giant Ocean!!" premiered.
 * 2005: Chapter 361 "P.S." was released in Shonen Jump issue #18.
 * 2006:
 * Volume 41 "Declaration of War" was published in Japan.
 * Volume 10 "OK, Let's Stand Up!" was published in the united States.
 * 2007: One Piece Yellow: Grand Elements was published in Japan.
 * 2010: Episode 445 "A Dangerous Meeting! Blackbeard and Shiliew of the Rain" premiered.
 * 2011:
 * Chapter 619 "At the Sea Forest" was released in Shonen Jump issue #17.
 * One Piece x Toriko Crossover was published.
 * 2016: Chapter 821 "Understood" was released in Shonen Jump issue #18.
 * 2016: Volume 81 "Let's Go See Master Nekomamushi" was published in Japan.
 * 2018: One Piece novel A Vol. 1 "Spade Pirates Foundation" was published in Japan.