Zou

Following Nami and the others, Luffy and the others reach the "elephant". The island rested on the back of a giant elephant (Zunisha) that roamed the sea, and the "mink tribe" in the form of beasts formed a nation. Luffy and the others meet Wanda and Carrot of the mink tribe and are guided by them to reunite with Nami and the others. However, Sanji, who was supposed to be with Nami and the others, was not there. Luffy and the others are told by Nami what happened to Zou and Sanji.

It all started 17 days ago, when Kaido's subordinate, "Jack of Drought", attacked Zou and demanded that he hand over the samurai of Wano Country, "Thunder Zo". The Minks deny the existence of the samurai, but Jack refuses to listen and resorts to force. Led by two kings, a porcupine and a cat viper, the Mink tribe put up a fierce fight, but are destroyed by the poison gas weapon used by Jack. After Jack and the others leave the island, Nami and the others visit the elephants and see the devastation of the mink tribe and rush to rescue them. Thanks to this, the Mink tribe survived, and Nami and the others were treated as benefactors.

Then, two days ago, Big Mom's pirate Beggie came to Zou in pursuit of Nami and the others. Bedge presents Sanji with an invitation to a tea party hosted by Big Mom. The main event of the tea party was the wedding of Sanji and Big Mom's daughter, Pudding. The marriage was decided by Sanji's relatives, the "Vinsmoke family". The Vinsmoke family is the ruling family of the Kingdom of Gelma, a maritime nation with a powerful army "Germa 66 (Double Six)", and Sanji was the third son of the king. Fearing that Big Mom's hands would reach the people around him, Sanji said, "I'll definitely go back," and went to Big Mom alone. 

In order to bring Sanji back, Luffy decides to sneak into Big Mom's tea party alone. The next morning, news came that samurai had appeared all over the island. What appeared was Nishikiemon and the others, who landed late. When Nishikiemon tells him that he has come to look for the "Thunder Elephant", the porcupine and the cat viper tell him that the Thunder Elephant is safe. The Mink tribe, who were brothers to the Kogetsu clan of Wano Country, would not sell their friends even if the country was destroyed. 

Later, it is revealed that Momo no Suke is not actually the son of Nishikiemon, but the heir of the daimyo of Wano Province "Kozuki Oden". And the Mink tribe has continued to protect the "text of road history (Poneglyph)". It was a signpost to the final point of the Grand Line, Raftel. There are four "Lord's History Texts" in the world, and if you connect the points written in each of them on a map, the location of Raftel will emerge. Of the four, two were in the hands of Kaido and Big Mom, respectively.

One more surprising fact. Momo's father, Oden Kozuki, had once arrived at Raftel with the pirate king Roger. However, Oden had been executed by the "shogun" of Wano Province and Kaido. Nishikiemon's purpose was to defeat the shogun and "open up" Wano Province to carry on Oden's will. In response to Momo's request for help, Luffy forms an alliance with Nishikiemon and the Mink Tribe. Aim to overthrow Kaido. 

However, Jack and the others attack again and attack the elephant lord. In the confusion, Luffy and Momo hear the voice of the Elephant Lord. Momo responds to the elephant lord who asks him to fight, and the elephant lord destroys Jack's fleet with a huge swing of his nose.

After that, the group split into four groups. Luffy, Nami, Chopper, and Brook travel to Whole Cake Island, where a tea party is held with Mink warrior Pedro. Zoro, Law, and Nishikiemon go to Wano Country first. Nekomushi is in search of Marco, the former captain of the Whitebeard Pirates No. 1. Momo stayed with the porcupine for a while. Luffy vowed to reunite with everyone in Wano Country and traveled to Whole Cake Island.