Arc 12The World's Greatest Swordsman
Bai Yu defeated Dracule Mihawk, claimed the title of World's Greatest Swordsman, and accepted a mission to bring Fish-Man Island to the World Affiliated Nation Conference. He arrived to find Neptune refusing his help, Shirahoshi missing, and Hody Jones launching a coup.
- Kaido attacked Bai Yu's ship, but Dracule Mihawk intercepted his blast, and allies including Jinbe, Hancock, Shanks, Whitebeard, and Garp forced Kaido to withdraw.
- Bai Yu fought Mihawk in a destructive sword duel, entering Bloodthirsty Void State and unleashing Six Paths Five Rings: Kurikara Tensho.
- Aokiji froze the tsunami from their final clash, and Mihawk admitted defeat as Bai Yu became the World's Greatest Swordsman.
- Whitebeard offered Bai Yu a place in his crew and the role of successor, but Bai Yu refused and gave Ace a family letter.
- The Five Elders plotted to eliminate Bai Yu, then used his retirement as a condition for sending him to invite Fish-Man Island to the early conference.
- Bai Yu accepted the mission despite Sengoku and Garp suspecting a trap, while Charlotte Linlin chose to watch the Five Elders' response rather than interfere.
- Neptune refused Bai Yu's invitation and offer to free Shirahoshi, but Bai Yu stayed after Madame Shyarly warned him of disaster.
- Hody Jones revealed that Shirahoshi had vanished and announced his plan to overthrow Neptune, while Bai Yu prepared to face the attackers.