The second season of the One Piece anime series was directed by Kōnosuke Uda and produced by Toei Animation. It contains a single story arc, called "Gurando Rain Totsunyū", which adapts Eiichiro Oda's One Piece manga from shortly after the beginning of the 12th through the beginning of the 15th volumes over 15 episodes, following the first adventures of Monkey D. Luffy's Straw Hat Pirates in a fictional sea, called the Grand Line. Stuck in the bowels of the giant whale Laboon, they encounter the whale's caretaker, an old man named Crocus, and Nefeltari Vivi. Taking her with them, they make enemies of the Warlord Sir Crocodile's secret organization, Baroque Works, and befriend the giants Dorry and Broggy on the prehistoric island Little Garden.
The fourth season of the One Piece anime series was directed by Konosuke Uda and produced by Toei Animation. Like the rest of the series, it follows the adventures of Monkey D. Luffy and his Straw Hat Pirates. The first 18 episodes, dealing with Nefertari Vivi and the Straw Hats as they arrive in Alabasta to stop a civil war from happening, make up the Arabasta Jōriku arc. The remaining episodes make up the "Arabasta Gekidō" arc, in which the protagonists defeat Baroque Works and Nico Robin joins the crew. This season adapts the 18th to 24th volumes of the manga by Eiichiro Oda.
The fifth season of the One Piece anime series was directed by Kōnosuke Uda and produced by Toei Animation. Like the rest of the series, it follows the adventures of Monkey D. Luffy and his Straw Hat Pirates, but instead of adaptating part of Eiichiro Oda's One Piece manga, it features three completely original, self-contained story arcs. The first five episodes, each following their own plots, form the "Dreams!" (ドリームス!) arc. The next three episodes make up the "Shutsugeki! Zenii Kaizoku Dan" storyline and focus on the Straw Hats meeting an old moneylender. The last five episodes form the "Niji no Kanata e" arc and deal with the protagonists getting trapped inside a mysterious, rainbow-colored mist.
The sixth season of the One Piece anime series, split into two "Sky Island" chapters, was produced by Toei Animation, and directed by Konosuke Uda based on Eiichiro Oda's manga by the same name. It was licensed by Funimation as the first season after 4Kids Entertainment dropped their heavily edited dubbing. The sixth season deals primarily with the Straw Hat Pirates's exploration of the legendary Skypiea, a land of winged humanoids built upon clouds, where they face off against Eneru and his henchmen.
The seventh season of the One Piece anime series are produced by Toei Animation and directed by Kōnosuke Uda adapted from Eiichiro Oda's manga of the same name. The season was released in Japan as a single chapter, called "Escape! The Naval Fortress & The Foxy Pirate Crew". It deals with the Straw Hat Pirates' infiltration of and escape from a Marine fortress to reclaim their confiscated treasure. The Straw Hats later meet Foxy the Silver Fox and his crew, who challenges them to the Davy Back Fight, a competition involving battles between Foxy's crew and Luffy's crew. Soon after, they encounter Admiral Aokiji, a Marine admiral who is determined to capture Nico Robin, but spares the crew after defeating Luffy.
The eighth season of the One Piece anime series contains the "Water Seven" Chapter. Its episodes are directed by Kōnosuke Uda and Munehisa Sakai and produced by Toei Animation. The episodes are based on Eiichirō Oda's One Piece manga series, and adapt the 34th through 39th volumes of its source material over thirty-five episodes. They initially ran from April 17, 2005 through April 30, 2006 on Fuji TV. Twelve DVD compilations, each containing three episodes, were released by Toei between January 10 to December 5, 2007. In October 2011, Funimation announced they had acquired this season, along with the entirety of the previous season for release as part of their own US "Season Four". The press release stated that the episodes would be featured in 16:9 widescreen. The press release also mentioned that the episodes would be released in "HD" hinting at a possible Blu-ray release, but made no direct mention of the high definition disc format. However, the Japanese analog broadcasts are still in 4:3 fullscreen format.
The ninth season of the One Piece anime series was directed by Kōnosuke Uda and produced by Toei Animation. Like the rest of the series, it follows the adventures of Monkey D. Luffy and his Straw Hat Pirates from Eiichirō Oda's One Piece manga series. The majority of the season covers the "Enies Lobby" story arc, which adapts Oda's manga from the end of the 39th through the 45th volumes. Between Enies Lobby episodes there is the five episode arc "Straw Hat Theater & Straw Pirate Tales", with the flashback scenes being shown in 4:3 fullscreen format and are pillarboxed within the 16:9 widescreen format, and three episodes covering the "Historical Drama Boss Luffy". "Ice Hunter" deals with the Straw Hats taking on the Atchino Family to retrieve their flag. The final episode is a stand-alone storyline featuring Chopperman.
The tenth season of the One Piece anime series, the "Thriller Bark Chapter", was produced by Toei Animation, and directed by Munehisa Sakai based on Eiichiro Oda's manga by the same name. It deals with the meeting and recruitment of Brook in a mysterious mist. There, the crew comes across Thriller Bark captained by Gecko Moria, one of the Seven Warlords of the Sea who uses shadows to create a crew of zombies.
The eleventh season of the One Piece anime series was produced by Toei Animation, and directed by Hiroaki Miyamoto based on Eiichiro Oda's manga by the same name. The majority of the season covers the "Sabaody Archipelago" story arc, which deals with the Straw Hats preparing to enter Fishman Island by having their ship coated for undersea travel. During their stay, they meet an old enemy Hatchan, his friends Keimi and Papaggu, and the first mate of Gold Roger, Silvers Rayleigh, as well as 9 rookie pirates known as the "11 Supernovas". In an incident involving the auction of Keimi, the crew and the pirates are attacked by top members of the Marines, including Bartholomew Kuma, one of the Seven Warlords of the Sea. The final two episodes continue the "History Drama Boss Luffy" story established in the fourth TV Special and featured in the ninth season.
The twelfth season of the One Piece anime series was directed by Hiroaki Miyamoto and produced by Toei Animation. It contains a single story arc, called "Nyōgashima", which mainly adapts material from the 53rd and 54th volumes of Eiichiro Oda's One Piece manga, following the adventures of Monkey D. Luffy and his Straw Hat Pirates after they are scattered across the world by Bartholomew Kuma. Focusing on Luffy, the first 10 episodes depict his stay on Amazon Lilly, an island that is inhabited solely by the Kuja, a tribe of women warriors, and ruled by their leader, the "Pirate Empress" Boa Hancock, one of the Seven Warlords of the Sea. The remaining 4 episodes give insight into the fates of Luffy's crew, while Luffy with Hancock's help, who fell in love with him, travels to Impel Down, the world's largest prison, to save his brother, Portgas D. Ace, from execution.
The thirteenth season of the One Piece anime series titled "Impel Down", was produced by Toei Animation, and directed by Hiroaki Miyamoto based on Eiichiro Oda's manga by the same name. It deals with the imprisonment of Luffy's brother Portgas D. Ace and Luffy's attempt with Hancock's help to infiltrate the great prison Impel Down to save him. Luffy meets several old enemies from his past in this arc, including his némesis Buggy the Clown, Mr. 2, and Mr. 3. There is also a 4 episode arc set outside the current continuity titled "A Gold Lion's Ambition", which serves as a prologue to the concurrently released One Piece Film: Strong World. This arc features Luffy and his crew's run-in with a group of pirates hired by Shiki, the film's main antagonist. Following this arc, the Impel Down story line continues where it had left off.
The fourteenth season of the One Piece anime series was produced by Toei Animation, and directed by Hiroaki Miyamoto. The season began broadcasting in Japan on Fuji Television on June 27, 2010 and ended on September 25, 2011. The season focuses on Monkey D. Luffy as he and Emperor Pirate Whitebeard's pirates tries to save his brother Portgas D. Ace from the ejecution. It contains two story arcs. The first is titled "Marineford", which mainly adapts the 56th to 59th volumes of the material from the One Piece manga by Eiichiro Oda. The second story arc, which is also titled ”Post-War”, also adapts material from the 59th to 61st volumes of the manga.
The fifteenth season of the One Piece anime television series was produced by Toei Animation, and directed by Hiroaki Miyamoto. The season was broadcast in Japan on Fuji Television on October 2, 2011 to December 23, 2012. Like the rest of the series, it follows the adventures of the reunion of Monkey D. Luffy and his Straw Hat Pirates after completing their training sessions two years later. The first of fourteen DVD compilations was released on December 5, 2012, and the last one was released on December 3, 2013.
The sixteenth season of the One Piece anime television series was produced by Toei Animation, and directed by Hiroaki Miyamoto. The season began broadcasting in Japan on Fuji Television from January 6, 2013 to January 12, 2014. Like the rest of the series, it follows the adventures of Monkey D. Luffy and his Straw Hat Pirates. The first of twelve DVD compilations was released on January 8, 2014, with the last being released on June 4, 2014.
The seventeenth season of the One Piece anime television series was produced by Toei Animation, and directed by Hiroaki Miyamoto and Toshinori Fukuzawa. The season began broadcasting in Japan on Fuji Television from January 19, 2014, to June 19, 2016. It compiles 118 episodes, making it the second longest season of the series. Like the rest of the series, it follows the adventures of Monkey D. Luffy and his Straw Hat Pirates. The first DVD compilation of this season was released on July 2, 2014, with individual volumes being released monthly. Funimation began releasing their English dub of the season through VOD on December 1, 2020.
The eighteenth season of the One Piece anime television series was produced by Toei Animation, and directed by Toshinori Fukuzawa, Satoshi Ito, and Tatsuya Nagamine. The season began broadcasting in Japan on Fuji Television from June 26, 2016 to April 2, 2017. Like the rest of the series, it follows the adventures of Monkey D. Luffy and his Straw Hat Pirates. The season contains three story arcs.
The nineteenth season of the One Piece anime television series was produced by Toei Animation, and directed by Toshinori Fukuzawa. The season began broadcasting in Japan on Fuji Television on April 9, 2017. Like the rest of the series, it follows the adventures of Monkey D. Luffy and his Straw Hat Pirates. The season contains two story arcs.
The twentieth season of the One Piece anime television series is produced by Toei Animation and directed by Tatsuya Nagamine, Satoshi Itō and Yasunori Koyama. The season was broadcast in Japan on Fuji Television from July 7, 2019, to December 17, 2023. On April 19, 2020, Toei Animation announced that the series would be delayed due to the ongoing COVID-19 pandemic. They later scheduled the series' return for June 28, 2020, resuming from episode 930. On March 10, 2022, it was announced that the series would be delayed until further notice due to a security breach in Toei Animation's network on March 6, 2022. On April 5, 2022, it was announced that the series would return on April 17, 2022, with the airing of episode 1014.
