When Is Gear 4 Introduced -

Up until this point, Luffy had been using Gear 2 and Gear 3, but Doflamingo’s "Awakened" Ito Ito no Mi (String-String Fruit) abilities proved too versatile and durable. Realizing that his current strength wasn't enough to protect his friends and the citizens of Dressrosa, Luffy reveals that he spent his two-year timeskip on Rusukaina developing a new technique to combat the massive monsters on that island. What Makes Gear 4 Unique?

: First appeared in and Episode 870 during the fight against Charlotte Katakuri. Functionality and Origin

The introduction is a major turning point in the series. It's not just a power-up—it comes with a clear downside (severe stamina drain, inability to move afterward for 10 minutes). The design (bulky, bouncy "Boundman") caught fans off guard but quickly became iconic. The moment is visually stunning in the anime and perfectly paced in the manga. If you're watching/reading, it delivers on the hype built over the previous ~50 episodes/chapters of the Dressrosa battle.

True to Eiichiro Oda’s writing style, this massive power boost comes with a heavy price. When Gear 4 is introduced, we quickly learn its fatal flaw: it exhausts Luffy’s Haki completely. Once the timer runs out, Luffy is left physically depleted and unable to use Haki for ten minutes, leaving him completely vulnerable—a plot point that added immense tension to the final moments of the fight. Impact on the Series when is gear 4 introduced

The transformation makes its television debut in Episode 726 , also titled "Gear Fourth! The Phenomenal Boundman!" which first aired in early 2016. The Context: The Battle for Dressrosa

This form, known as Boundman (or Bounce-Man), involves Luffy blowing a massive amount of air into his muscular structure, combining his rubber physiology with the defensive power of Armament Haki (Busoshoku). This gives him a bouncy, spring-like quality that drastically enhances his attack power and speed, allowing him to utilize the "Python" technique to change the direction of his attacks mid-air.

Doflamingo famously notes that Luffy remains "rubbery" even while hardened by Haki—a feat previously thought impossible. Up until this point, Luffy had been using

The technique is introduced in Episode 726 of the One Piece anime, titled "Gear 4! The Phenomenal Bounce-Man!"

Now that you know when Gear 4 is introduced, you can prepare for one of the most visually creative and high-octane fights in the entire One Piece saga.

Depending on whether you are reading the manga or watching the anime, the introduction happens at different points: : First appeared in and Episode 870 during

Luffy’s transformation into "Boundman" wasn't just a power-up; it was a complete shift in how he utilized his Gomu Gomu no Mi powers. The Exact Moment: Manga vs. Anime

The introduction happens during the climax of the . Luffy is locked in a life-or-death struggle against Donquixote Doflamingo , one of the Seven Warlords of the Sea.

Gear 4 is first introduced in Chapter 784 , titled "Gear Fourth." This chapter was released in April 2015.

: Luffy bites into his forearm and blows air directly into his muscle structure (rather than his bones, as with Gear 3) to increase mass and tension.