One Piece: Season 4
One Piece Season 4 continues the overarching saga across 39 episodes.
Season 4 Lore Primer
Key plot threads, lore context, and character stakes you need to remember before diving into this season.
- Picks up essential narrative continuity directly following the events of One Piece Season 3.
- Character alliances, factions, and personal loyalties undergo significant shifts under escalating stakes.
- Addresses unresolved cliffhangers and thematic mysteries introduced during previous seasons.
- Establishes the primary seasonal conflict that drives serialized character arcs toward the finale.
Season overview
One Piece Season 4 continues the overarching saga across 39 episodes.
Episode Guide
Season 4 Progress Shield
Alabasta's Hero and a Ballerina on the Ship!
Dec 9, 2001
Crocodile appears to stop rampaging pirates. Luffy and his crew meet Mr. 2 Bon Clay who shows off his devil fruit power and Vivi sees a shocking sight.
Off to the Desert Kingdom! The Rain-Summing Powder and the Rebel Army!
Dec 16, 2001
Luffy separates from the rest of the crew, right after arriving at Alabasta's port city of Nanohana. The crew dons disguises while Luffy learns of Dance Powder.
The Heroes Reunion! His Name is Fire Fist Ace!
Dec 23, 2001
While in Nanohana, the Straw Hats encounter Smoker and Tashigi. A powerful pirate named Portgas D. Ace appears.
Ace and Luffy! Hot Emotions and Brotherly Bonds!
Jan 6, 2002
Ace fights Smoker while the Straw Hats run for their ship. Luffy reunites with his brother, who has joined the Whitebeard Pirates after leaving home, and is searching for a forme
Erumalu, The City of Green and the Kung Fu Dugongs!!
Jan 13, 2002
Ace decides to travel with the Straw Hats, as he is hunting for a man known as Blackbeard.
Adventure in the Country of Sand! The Monsters that Live in the Scorching Land!
Jan 20, 2002
After leaving Erumalu, the Straw Hats plus Vivi & Ace continue through the desert, facing the many dangers of it.
Enter the Desert Pirates! The Men Who Live Freely!
Jan 27, 2002
Nami and Vivi found themselves an easier way to travel in the desert and leave all men behind.
False Fortitude! Camu, Rebel Soldier at Heart!
Feb 3, 2002
After hearing that a small village has fake Rebel Army bodyguards that have been keeping peace, Vivi asks the men of the crew to test if they're worthy of staying.
Rebel Warrior Koza! The Dream Vowed to Vivi!
Feb 10, 2002
Still trekking through the Alabasta desert, the crew beats up a giant desert scorpion for lunch, while Vivi tells Nami about her past and her friendship with Kohza.
Showdown in a Heat Haze! Ace vs. the Gallant Scorpion!
Feb 17, 2002
Ace fights against a bounty hunter, who claims to have defeated Blackbeard, although this was a lie to lure Ace out and challenge him in order to inspire his children to follow t
Ruins and Lost Ways! Vivi, Her Friends, and the Country's Form!
Feb 24, 2002
Zoro, Chopper and Luffy manage to get themselves lost and stumble across some huge underground ruins.
Spiders Café at 8 o'Clock! The Enemy Leaders Gather!
Mar 2, 2002
Baroque Works plan starts to take effect, and for that, the Number Agents gather to meet Mr. 0. Meanwhile, the crew finds out that the Rebel Army has moved out of Yuba and headed t
Luffy vs. Vivi! The Tearful Vow to Put Friends on the Line!
Mar 10, 2002
In Yuba, Luffy learns that Toto was entrusted by Cobra to watch over the land and figures out a way to stop the sandstorm.
The Battlefront of Alabasta! Rainbase, the City of Dreams!
Mar 17, 2002
After the struggle, Vivi decides to go after Crocodile with the Straw Hats. The crew travels to the city of Rainbase, but run afoul of Smoker and Tashigi.
The Trap of Certain Defeat! Storming Raindinners!
Mar 24, 2002
Most of the Straw Hats, along with Smoker, are trapped by Crocodile. Vivi reunites with the royal guardian Pell, but is captured by Miss All-Sunday. Crocodile reveals his invinci
Operation Utopia Commences! The Swell of Rebellion Stirs!
Apr 14, 2002
Baroque Works' plan to take over Alabasta is set in motion.
The Terrifying Banana Gators and Mr. Prince!
Apr 21, 2002
Most of the Straw Hats are helplessly trapped as Vivi tries desperately to get the key to their cage. but fails. Crocodile is contacted by someone known as "Mr. Prince."
The Key to a Great Comeback Escape! The Wax-Wax Ball!
Apr 28, 2002
The identity of "Mr. Prince" is revealed.
Merciless Mortal Combat! Luffy vs. Crocodile!
May 5, 2002
After escaping from Rain Dinners, the Straw Hats and Vivi cross the desert to Alubarne, where the final battle will take place.
Dash For a Miracle! Alabasta Animal Land!
May 12, 2002
Luffy is left for dead by Crocodile, but is helped by the mysteríous Miss All-Sunday. The rest of the Straw Hats reach Alubarna.
Rebel Army vs. Royal Army! Showdown at Alubarna!
May 19, 2002
The revolution is on the verge of starting and the crew comes out with a plan that could stop it.
Alubarna Grieves! The Fierce Captain Karoo!
Jun 2, 2002
Vivi tries to call out to the Rebel Army, but fails because of a Baroque Works infiltrator in the Royal Army interferes.
Sworn on a Friend's Dream! The Battle of Molehill, Block 4!
Jun 9, 2002
Things look hopeless for Usopp & Chopper as they continue to suffer from every attack that the Mr.4 team makes. However, the tides may be beginning to turn as Usopp learns what it
Big Opening Day Today! The Copy-Copy Montage!
Jun 16, 2002
Albeit severely beaten and bruised, Usopp and Chopper have finally defeated the Mr.4 team. However, Mr. 2 has figured out Sanji's weakness.
Transformed into Nami! Bon Clay's Rapid-Fire Ballet Kenpo!
Jun 23, 2002
Though Mr. 2 discovers Sanji's weakness, Sanji still defeats his opponent after an evenly-matched fight. Meanwhile, before Vivi could give the word to blow up the palace, Crocodile
Nami's Cyclone Advisory! Clima Takt Burst!
Jun 30, 2002
Nami faces off against Miss Doublefinger and tries to figure out her new weapon that Usopp made, the Clima-Tact.
Secret Passed Down in the Royal Family! The Ancient Weapon Pluton!
Jul 14, 2002
While Crocodile reveals to Vivi about the ancient weapon Pluton, Nami attempts to defeat Miss Doublefinger with her most powerful attack: The Tornado Tempo.
Secret of Powerful Swordplay! Ability to Cut Steel and the Rhythm Things Have!
Jul 21, 2002
While Miss. Doublefinger's fight with Nami was challenging, Zoro is having an even more difficult time fighting Mr.1: A man who can change his entire body into steel - something th
The Battle is Over! Koza Raises the White Flag!
Aug 4, 2002
When Vivi reveals Crocodile's plan to Koza, he attempts to stop the fighting, but is shot. Crocodile reveals that he has set up a massive bomb in the city.
Where Vivi's Voice Gets Heard! The Hero Descends!
Aug 11, 2002
As Koza tries to stop the Rebel Army, both sides are once more fighting due to the intervention of Baroque Works. Vivi is thrown to her certain death when Luffy saves her and chall
Sand Croc and Water Luffy! The Second Round of the Duel
Aug 18, 2002
Luffy fights Crocodile with more success this time by using water, but still loses this round. Meanwhile, the other Straw Hats hurry to locate the bomb before it goes off. Nico Rob
That Looks Croc-ish! Luffy, Run to the Royal Tomb!
Aug 25, 2002
Crocodile joins Robin in the tomb, and orders her to translate the Poneglyph. Robin tells him that Pluton was not mentioned and that it was only about history, but Crocodile figure
The Nightmare Draws Near! This is the Sand-Sand Clan's Secret Base!
Sep 1, 2002
Luffy fights with Crocodile by using blood on his fists. Meanwhile Vivi finds the bomb, and calls the Straw Hats together.
Magnificent Wings! My Name is Pell, Guardian Deity of the Country!
Sep 8, 2002
Vivi finds the bomb inside of the clock tower, but the Mr. 7 pair of Baroque Works are there to protect it. Vivi defeats them, but she realizes the bomb cannot be stopped so easily
I Will Surpass You! Rain Falls in Alabasta!
Sep 15, 2002
Luffy defeats Crocodile by punching him through solid bedrock. When Crocodile falls, the rain-drops calm the soldiers.
A Farewell to Arms! Pirates and Different Ideas of Justice!
Oct 6, 2002
Now that the battle has ended, the outcome is tallied. Igaram appears with proof of Cobra's innocence, as well as Koza telling everything. Tashigi and Smoker both are rewarded for
The Pirates' Banquet and Operation Escape from Alabasta!
Oct 6, 2002
Luffy is rescued from the collapsed tomb where he fought Crocodile and brought into Cobra's palace to rest. When he awakens, a magnificent banquet is thrown for the pirates, then,
It All Started On That Day! Vivi Tells the Story of Her Adventure!
Oct 20, 2002
It's the day for Vivi's speech and her decision whether or not to continue to be with the Straw Hats. Meanwhile, Bon Kurei and his crew attempt to protect the Straw Hats from Hina.
Scent of Danger! The Seventh Member is Nico Robin!
Oct 27, 2002
The Marines fail again to catch the Straw Hats. After escaping from Marines, Nico Robin (Ms. All Sunday) appears from inside of Straw Hats ship. She manages to persuade the crew to