The Secret of Wano Country - The Kouzuki Family and the Poneglyphs

Thrilled that four Road Poneglyphs can lead him to the journey's end, Luffy bolts to chase them down at once. His crew restrains him, then learns the unsettling truth that two of those stones belong to the Emperors Big Mom and Kaidou. The revelation rattles several Straw Hats, though Robin remains the sole living person able to decipher the carvings.

Far away, Jack relives his recent ambush on the Marine convoy escorting Doflamingo, only to be roused by the return of Sheepshead, Ginrummy, and the men he had stationed on Zou.

Usopp suggests quietly copying the Emperors' poneglyphs with ink and special paper, then slipping away unnoticed, but Luffy rejects the scheme as cowardly. Nekomamushi worries for Robin, since her unique skill makes her a target for anyone seeking the Void Century's true history; she trusts her crew, recalling her rescue at Enies Lobby, and they renew their pledge to guard her.

Back in the Whale Tree, the group learns the Kouzuki Family forged the poneglyphs eight centuries ago, passing down only the ability to read and write them, not to build them. Kin'emon tearfully discloses that Oden never taught Momonosuke because Kaidou and the Wano shogun put Oden to death. The Beasts Pirates now hold Wano, having hunted Oden and his retainers because Oden sailed to Laugh Tale with Roger and learned the world's secret.

Anime-original material has Chopper ask whether three Road Poneglyphs would suffice, with Nami confirming all four are required. The adaptation also fleshes out Jack's dream of striking the warships carrying Doflamingo, cutting away just as he braces to face Fujitora, Sengoku, and Tsuru, and adds Sheepshead and Ginrummy rejoining him. The episode sits within the Zou Arc.