In the sprawling narrative of Eiichiro Oda’s One Piece , few moments carry as much raw intensity and narrative weight as the debut of a new Gear. Following the immense physical toll of Gear Second and the grotesque inflation of Gear Third, Monkey D. Luffy’s next evolution was not just a power-up—it was a desperate necessity. The first episode in which Luffy unleashes Gear Fourth is (titled “Gear Fourth! The Bouncy Man of Fury”). This transformation occurs during the climactic battle against the formidable Donquixote Doflamingo on the island of Dressrosa.
| Form | First Appearance (Episode) | Arc | | :--- | :--- | :--- | | Bounce Man | Episode 726 | Dressrosa | | Tank Man | Episode 807 (Vs. Cracker) | Whole Cake Island | | Snake Man | Episode 870 | Whole Cake Island | which episode luffy uses gear 4
The episode itself is a masterclass in anime escalation. After being launched into the atmosphere, Luffy bites into his own arm—a callback to how he inflates his bones for Gear Third. However, this time, he does not blow air into his bones but rather into his . The result is visually shocking: Luffy’s arm swells to colossal proportions, followed by his entire torso and legs, transforming him into a hulking, bouncing titan covered in dark, swirling patterns of Busoshoku Haki (Armament Haki). The technique is named Gear Fourth: Boundman . In the sprawling narrative of Eiichiro Oda’s One
Here are the specific details regarding the debut and subsequent variations: The first episode in which Luffy unleashes Gear
Monkey D. Luffy uses for the first time in Episode 726 of the anime.
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