Wano Country Saga

The crew travels to the isolated samurai nation of Wano, occupied and oppressed by the Emperor Kaido and the shogun Orochi. They unite with the Kozuki clan's retainers and the mink tribe in a massive raid on Onigashima. Luffy awakens his true devil fruit power—Nika, the Sun God. Despite overwhelming odds and suffering, Kaido is finally defeated and Wano is freed.

The Wano Country Saga represents the convergence of multiple narrative threads and the true beginning of genuine revolutionary war against the Four Emperors. Wano, isolated from the world through government control, exists in a state of oppression and poverty despite possessing significant resources. The local government under Shogun Orochi and Emperor Kaido exploits the nation's wealth while presenting a facade of normal rule. Kin'emon, the fox-fire swordsman and former retainer of Kozuki Oden, is the beating organizational heart of the rebellion. Having traveled twenty years forward in time alongside Momonosuke and the other Scabbards to reach Wano's present, Kin'emon spent years laying groundwork — spreading coded messages through flower patterns, recruiting allies in hiding, and managing Momonosuke's growth into a lord capable of inspiring fighters to die for him. The entire coalition's existence is inseparable from his patient, meticulous orchestration of the impossible. The arc introduces Oden's backstory through extended flashback, establishing Wano's tragic history. Oden, the previous shogun's son, sailed with Whitebeard and briefly with Gol D. Roger. His experiences revealed the world's true nature and history beyond official narratives. Upon returning to Wano, Oden attempted to open the country to the world. His efforts threatened Kaido and Orochi's power, leading to his execution. His death traumatized Wano's samurai, leaving them leaderless and defeated for decades. Kaido, one of the Four Emperors, represents power exceeding even previous antagonists. His dragon form, combined with immense physical strength and tactical genius, makes him functionally unstoppable through conventional means. The raid on Onigashima represents the single largest battle in the series — hundreds of participants, multiple simultaneous conflicts, and stakes encompassing an entire nation's freedom. Luffy's awakening of his true Devil Fruit power — the Hito Hito no Mi: Model Nika — represents the series' turning point. His earlier "Gomu Gomu no Mi" was a renamed Human-Human Fruit, with Nika being the legendary "Sun God" from lost history. Gear Fifth transforms him into a reality-bending force capable of treating the world itself as rubber. Yamato, Kaido's own offspring, makes the crucial decision to join Luffy's side rather than inherit the throne her father intended — a symbolic breaking of Kaido's dynasty that mirrors Kin'emon's twenty-year effort to break his occupation of Wano from within. The arc's conclusion with Kaido's defeat marks the end of Four Emperors' unchallenged dominance. For the first time, the Straw Hats defeat an Emperor directly. Wano's freedom requires rebuilding — years of occupation left deep scars. Yet the victory establishes that the system the Four Emperors represent, while powerful, is not invincible.