Season 0 of One Piece premiered on December 22, 1999.

Season 1 of One Piece premiered on October 20, 1999.

Influenced by Shanks, Luffy starts his journey to become the Pirate King. At the beginning of his journey, he meets a boy named Koby, who wants to become a Marine. They reach Shells Town, where they meet corrupt Marine captain Axe-Hand Morgan, his son Helmeppo, and the pirate hunter Roronoa Zoro.

Following the first adventures of Monkey D. Luffy's Straw Hat Pirates head to a 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.

When Nami catches a fatal illness, the crew is forced to stop at Drum Island, a kingless country that is trying to establish a new government. Due to the actions of the previous king, Wapol, there is only one doctor left—a "witch" named Kureha who lives at the top of a mountain. Luffy and Sanji must reach the peak, but the exiled King Wapol returns to reclaim his country. There they meet Chopper who joins the crew.

The Straw Hats, with Kureha's assistant Tony Tony Chopper, finally arrive at Arabasta, which is on the verge of civil war. Vivi must reach the rebels and tell them the real cause behind the conflict, but Crocodile, leader of Baroque Works and one of the Seven Warlords of the Sea, will not just stand by and watch. In the end, Baroque Works, marine forces, pirates, the royal guards, and the rebel army clash in a battle that will determine the fate of the country itself.

Dreams! The Zenny Pirate Crew Sortie! Beyond the Rainbow features three completely original, self-contained story arcs. The first five episodes, each following their own plots, form the "Dreams!" arc. The next three episodes make up the , "Sortie! Zenny Pirates" storyline and focus on the Straw Hats meeting an old moneylender. The last five episodes form the "To the Other Side of the Rainbow" arc and deal with the protagonists getting trapped inside a mysterious, rainbow-colored mist.

The Straw Hats arrive on the Sky Island "Skypiea" a land of winged humanoids built upon clouds and learn of its connections to Jaya and Mont Blanc Noland's tale of a lost city of gold. As the crew embarks in search of treasure, they become entangled in a three-way war between the native Skypieans, the vengeful Shandians, and the land's cruel "god", Enel.

after the end of the Sky Island Saga where instead of splashing down in the open sea, the Going Merry is trapped within the enclosed and heavily fortified waters of a marine base, where the crew must scatter to survive before attempting to retake their ship and escape. It deals with the Straw Hat Pirates' infiltration to 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.. It is also the setting of the fight between Admiral Aokiji and Monkey D. Luffy. Long Ring Long Land is the seventh island the Straw Hat Pirates encounter on the Grand Line.I

The Straw Hats arrive at the oceanic metropolis of Water 7 to find a shipwright who can repair the Going Merry, as well as potentially join their crew. They soon become targeted by the Franky Family, the city's underground gang, and become involved in a plot within the Galley-La Company. The season centers around the intrigue of Water Seven as Nico Robin leaves the crew to seemingly join up with Cipher Pol No. 9, a hidden organization under the world government as the Straw Hat Pirates are accused of an attempted assassination on Iceberg, the leader of Water Seven and the Galley-La Company. Meanwhile, most of their money is stolen from Usopp by Franky's henchmen before they could use it for repairs. Later, after finding out the Going Merry was unrepairable, Usopp leaves when Luffy reluctantly admits that the ship is done for.

This arc sees the Straw Hat Pirates, led by their captain Monkey D. Luffy, embark on a perilous mission to rescue their crewmate Nico Robin from the clutches of the powerful World Government. Enies Lobby's events profoundly impact the crew, individually and as a group, and significantly shape their future adventures. 21 Apr 2023The Straw Hats, Sogeking, the Franky Family, and the shipwrights of the Galley-La Company arrive at Enies Lobby aboard Rocket Man to rescue Nico Robin and Franky. Standing in their way, however, are the forces of the World Government, including its deadly assassin organization, CP9. A

The Thriller Bark Arc is the eighteenth story arc in the series, and the first and only in the Thriller Bark Saga. The Straw Hats, during their journey into the Florian Triangle arrive at a haunted island/ship called Thriller Bark, in which their shadows are stolen by Warlord of the Sea Gecko Moria and must hurry to get them back before the sun rises. After defeating Moria, another Warlord shows up to make the Straw Hats' situation worse. The Straw Hats also gain a new crewmate, a living skeleton named Brook who becomes their musician.

The Sabaody Archipelago Arc is the nineteenth story arc in the series, and the first in the Summit War Saga of the manga and anime series, One Piece. The arc takes place in the titular archipelago, and centers around Luffy and his crew coming into conflict with a deadly slave trading ring that sells to the World Nobles. While there, the eleven dangerous rookie pirates known as the Eleven Supernovas arrive, keen on entering the New World through the archipelago as well. This arc marks a turning point for the Straw Hat Pirates since they were all utterly defeated by powerful opponents such as Admiral Kizaru, the Pacifista, Bartholomew Kuma, and Sentomaru, even though they have grown stronger in their own right. Sabaody Archipelago is the tenth island that the Straw Hats encounter on the Grand Line.

The Amazon Lily Arc is the twentieth story arc in the series, and the second in the Summit War Saga of One Piece. After his defeat at the hands of Kuma in Sabaody Archipelago, Luffy is sent flying and crash lands on Amazon Lily, an island exclusive to women that executes males on sight.

The Impel Down Arc is the twenty-first story arc in the series, and the third in the Summit War Saga of the One Piece series, continuing from the Amazon Lily Arc. Luffy puts finding his crew on hold in favor of rescuing his brother Ace from the underwater prison Impel Down. With some assistance from Boa Hancock, he manages to infiltrate the facility. However, fulfilling his objective and escaping the hellish prison might be easier said than done. The Marineford Arc (known as the Paramount War in the Viz Manga translation and the War of the Best in the FUNimation dub and subs) is the twenty-second story arc in the series, and the fourth in the Summit War Saga of the One Piece series, continuing on from Impel Down Arc.

The Fishman Island Arc is the twenty-fifth story arc. It is the second and last arc in the Fishman Island Saga of the One Piece series, continuing on from the Return to Sabaody Arc. The Straw Hat Pirates finally head for Fishman Island after their two year hiatus. But many surprises await them as they head for their undersea destination and even more so once they reach it. Fishman Island is the eleventh island that the Straw Hats encounter on the Grand Line.

The Punk Hazard Arc is the twenty-sixth story arc in the series and the first in the Dressrosa Saga of the One Piece series, continuing on from the Fishman Island Arc and the Fishman Island Saga. Upon finally entering the New World, the Straw Hat Pirates immediately receive a distress call from a group of people on an island called Punk Hazard, stating that they are being attacked by a samurai. Without hesitation, Luffy sets out to the blazing island, with Vice Admiral Smoker hot on his tail. On the supposedly death-ridden and empty island, the Straw Hats soon learn that they are not alone, meeting many new and old foes as they explore the purpose of the island. Punk Hazard is made up of a frozen side and a burning side. The island also contains the abandoned research laboratories of Dr. Vegapunk. Punk Hazard is the first island the Straw Hats encounter in the New World.

The Dressrosa Arc is the twenty-seventh story arc in the series and the second and final arc in the Dressrosa Saga (ドレスローザ編 Doresurōza-hen) of One Piece, continuing from the Punk Hazard Arc. Also known as the Pirate Alliance Saga, it is the second saga of the second half of the manga and anime series and is the eighth saga overall. After capturing Caesar Clown, the Straw Hats and Trafalgar Law travel with Kin'emon to Dressrosa; there, in the second stage of their plan for dethroning Kaido of the Four Emperors, they aim to take down the nation's king, Warlord of the Sea Donquixote Doflamingo. They challenge Doflamingo and uncover a decade-long conspiracy on Dressrosa island. Their resulting actions against the Warlord send a massive shockwave throughout the world and result in the birth of the Straw Hat Grand Fleet. Dressrosa is the second island the Straw Hats encounter in the New World, although the third island since the timeskip.

The Dressrosa Arc is the twenty-seventh story arc in the series and the second and final arc in the Dressrosa Saga (ドレスローザ編 Doresurōza-hen) of One Piece, continuing from the Punk Hazard Arc. Also known as the Pirate Alliance Saga, it is the second saga of the second half of the manga and anime series and is the eighth saga overall. After capturing Caesar Clown, the Straw Hats and Trafalgar Law travel with Kin'emon to Dressrosa; there, in the second stage of their plan for dethroning Kaido of the Four Emperors, they aim to take down the nation's king, Warlord of the Sea Donquixote Doflamingo. They challenge Doflamingo and uncover a decade-long conspiracy on Dressrosa island. Their resulting actions against the Warlord send a massive shockwave throughout the world and result in the birth of the Straw Hat Grand Fleet. Dressrosa is the second island the Straw Hats encounter in the New World, although the third island since the timeskip.

Season 18 of One Piece premiered on July 12, 2016.

The Zou Arc is the twenty-eighth story arc in the series and the first arc in the Four Emperors Saga of One Piece, continuing from the Dressrosa Arc and the Dressrosa Saga.

After defeating Doflamingo, the Straw Hats, Trafalgar Law, Kin'emon, and Kanjuro continue on to Zou, in order to reunite with Sanji and the others. When they arrive, however, they discover that Sanji has been swept up in a set of personal and political entanglements, and that Zou has been subjected to siege by Jack of the Beasts Pirates. All of this includes the startling revelations involving the location of the Straw Hats' ultimate goal: One Piece.

Zou is the third island the Straw Hats encounter in the New World.

Season 19 of One Piece premiered on September 5, 2017.

The Whole Cake Island Arc (ホールケーキアイランド編 Hōru Kēki Airando-hen), also known as the Sanji Retrieval Arc and the Tea Party From Hell Arc, is the twenty-ninth story arc in the series, while the Levely Arc is the thirtieth story arc. They make up the second and third arcs in Four Emperors Saga of One Piece, continuing from the Zou Arc.

Luffy, Nami, Tony Tony Chopper, Brook, Pekoms, Pedro and Carrot head to Whole Cake Island, where Big Mom of the Four Emperors resides. The Sanji Retrieval Team seeks to rescue their crewmate Sanji from his arranged marriage with Charlotte Pudding, set up to finalize a political alliance between the Charlotte Family and the Vinsmoke Family. In the midst of their operation, however, they become involved in a plot seeking to take down Big Mom herself.

After the Straw Hat Pirates' actions against the Big Mom Pirates are revealed to the world, royalty across the globe gathers for the Levely. Meanwhile, the Revolutionary Army prepares for their next move.

Season 20 of One Piece premiered on April 2, 2019.

The Levely Arc is the thirtieth story arc in the series and the third in the Four Emperors Saga of One Piece, continuing from the Whole Cake Island Arc.

After the Straw Hat Pirates' actions against the Big Mom Pirates are revealed to the world, royalty across the globe gathers for the Levely. Meanwhile, the Revolutionary Army prepares for their next move.

Season 21 of One Piece premiered on July 9, 2019.

The Wano Country Arc (ワノ国編 Wano Kuni-hen) is the thirty-first story arc in the series and the fourth in the Four Emperors Saga of One Piece, continuing from the Levely Arc.

The Ninja-Pirate-Mink-Samurai Alliance sets into motion their plan to recruit allies within Wano Country to liberate it from the control of the shogun Kurozumi Orochi and his allies, the Emperor Kaido and his crew the Beasts Pirates. The Big Mom Pirates follow the Straw Hats to Wano to get revenge for the previous events back on Totto Land, and Big Mom decides to form an alliance with Kaido in order to conquer the world.

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