Episode 771

"A Vow Between Two Men - Luffy and Kozuki Momonosuke" is the 771st episode of the One Piece anime.

Anime Notes

 * After Luffy's group learns that Oden was part of Roger's crew, this episode gives an explanation of the Void Century.
 * The anime adds the following:
 * Usopp asking the samurai if they knew the secret of the world after Zoro explained the reason why Doflamingo and Caesar were after them.
 * After the samurai and the two rulers of Zou revealed Oden's will to open Wano Country to the world, Brook explains to Chopper how closed off Wano Country is.
 * Right after Inuarashi and Nekomamushi explain that they will use the true power of the minks the next time they face the Beasts Pirates, Chopper tells Nekomamushi to take his injuries more seriously.
 * Kanjuro and Raizo also asking for Luffy's aid.