Episode 1070

"Luffy is Defeated?! The Determination of Those Left Behind" is the 1070th episode of the One Piece anime.

Short Summary
After defeating Luffy on the Skull Dome, Kaidou viciously beats Guernica before returning to the Skull Dome to battle the remaining allied forces on the Live Floor. Meanwhile, on the Skull Dome, Luffy undergoes a sudden transformation, which Zunesha declares to be the return of Joy Boy.

Long Summary
Taking a critical strike from Kaidou's kanabo, Luffy is defeated, deflating out of his Gear Fourth form and collapsing. Unhappy with being given an unfair advantage, Kaidou directs his rage at Guernica for intervening in the battle. Guernica accepts Kaidou's rage as he is struck down.

Transforming into his dragon form, Kaidou returns to the Live Floor, declares victory against Luffy, and demands the alliance's unconditional surrender. He declares his intentions to continue the New Onigashima Project, moving Onigashima to the Flower Capital and subjecting the remaining citizens of Wano Country to forced labour.

The remaining allied forces, despite being devastated by news of Luffy's alleged death, refuse to surrender, continuing the battle against the remaining Beasts Pirates. Momonosuke, despite being demoralized after noticing Luffy's voice go silent, also decides not to end his struggle, continuing to move the island away from the capital.

On the rooftop, Luffy's unconscious body suddenly regains a heartbeat. His body undergoes a mysterious transformation. Meanwhile, Zunesha likens Luffy's heartbeat the Drums of Liberation, a sign of Joy Boy's return.

Anime Notes

 * The anime adds the following:
 * Scenes of the activities inside Onigashima as Luffy is reverting out of Gear 4.
 * Kaidou having a flashback of Luffy preparing his final attack despite the impossible odds.
 * Kaidou explaining his plans of Slavery for the citizens of Wano Country.
 * Additional fight scenes from the Ninja-Pirate-Mink-Samurai Alliance inside Onigashima.
 * The anime extends the following:
 * Luffy collapsing after being knocked out.
 * Kaidou attacking Guernica.
 * Kawamatsu urging the Samurai to escape before they are burned to death.
 * The reaction from the crowd after Kaidou delivers the news of Luffy's "death".
 * Kaidou preparing to attack Nami before Marco blocks the attack.
 * Yamato convincing Momonosuke that they must not give up.
 * Nami refusing to surrender.
 * Luffy's body undergoing a new metamorphosis and Zunesha announcing to Momonosuke that Joy Boy has returned.
 * Beginning with this episode, an English subtitled version of the preview of the following episode, including the international One Piece logo at the start, as well as the following episode's English translated title at the end, was posted on One Piece's official YouTube channel, alongside the Japanese version.
 * Despite this, Toei Animation Inc.'s official YouTube channel, as well as One Piece's official English social media accounts, kept using the Japanese version with English subtitles.