Volume 56

Volume 56 is titled "Thank You".

Cover
The outside colored cover is magenta, and the title logo is maroon, light red fading from white, and gray. The author's name is written in light red.

In the center is Emporio Ivankov standing with his arms sticking out. Standing in front of him, from right to left, are Jinbe, Luffy, and Crocodile. In a background panel by Ivankov's head are Inazuma on his left and Daz Bones on his right.

Chapters

 * 542. Another Incident to Be Told (やがて語られるもう一つの事件): Ace is led to his execution as Luffy's group continues spreading chaos. Meanwhile, the Blackbeard Pirates arrive at Impel Down, and Shiliew is set free to stop them.
 * 543. Straw Hat and Blackbeard (麦わらと黒ひげ): Blackbeard confronts Shiliew as Luffy battles Hannyabal. However, Blackbeard arrives, takes out Hannyabal, and confronts Luffy.
 * 544. Even the Lid of Hell's Cauldron Will Open (地獄の釜の蓋もあく): Luffy fights Blackbeard, but Jinbe breaks them up as Magellan arrives.
 * 545. To the Sunshine in Outside World (陽のあたるシャバへ): Ivankov and Inazuma confront Magellan, but are defeated. The two groups of escapees then meet up as Luffy fights Magellan with Mr. 3's help.
 * 546. Captain of Fishmen Pirates, "Shichibukai" Jinbe (魚人海賊団船長“七武海”ジンベエ): Luffy and Mr. 3 fight Magellan as Jinbe helps the escapees board a Marine battleship.
 * 547. Escaping the Island (島破り): Magellan forces Luffy and his allies to retreat as they escape into the open.
 * 548. Thank You (ありがとう): Mr. 2 stays behind and faces Magellan's wrath in order to help Luffy and the prisoners escape.
 * 549. Ship Sailing Forth (出撃の艦): Blackbeard and Shiliew form an alliance, Jinbe reveals himself to be a Shichibukai, and Buggy is revealed to have sailed with Gol D. Roger.
 * 550. Marine Headquarters (海軍本部): People all over the world talk about the coming war as Ace is led to the gallows. Sengoku then reveals Ace to be the son of Roger.
 * 551. Yonko "Whitebeard" (四皇"白ひげ"): As the world reacts to Ace's lineage, Whitebeard and his crew arrives at Marineford.

SBS Notes

 * Death Wink is explained.
 * Oda says he does not want ideas for Devil Fruits but does want ideas for chapter covers.
 * Oda draws the Straw Hats genderswapped, beginning a series of drawing genderswapped characters.
 * The countries the Straw Hats would come from if they lived in the real world are shown.