To be in the upper echelons of power within the One Piece universe, Haki is a non-negotiable skill for one to have. Although Devil Fruits can give the users powerful abilities, there is only a certain level they can reach without the mastery of Haki, which is why the strongest characters in the setting tend to be masters of this power.

As such, Haki comes in three distinct forms; Conqueror's Haki, Observation Haki, and Armament Haki. The latter is the most common of them all but is definitely one of the trickier ones to master, so let's take a look at the most powerful users of the power in One Piece who have etched their names as the greatest of all time.

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Kaido Was A Master Of All Kinds Of Haki

The King of the Beasts

One doesn't get the title of 'World's Strongest Creature' without being an absolute powerhouse. Despite owning one of the most powerful Devil Fruits in the entire One Piece story, Kaido made it a point to hone his Haki to the utmost degree, to the point where he set himself apart due to how masterful his use of all Haki types truly was.

Though he is one of the few Conqueror's Haki users in the series, Kaido's Armament Haki was legendary, especially when he used it to reinforce and imbue his massive Kanabo, the Hassaikai, to do incredible damage. Primarily with his Armament Haki, he was able to put down Gear 4 Luffy without much trouble, multiple times.

Shanks Has Shown Incredible Prowess With Armament Haki

The Red-Haired Pirate

Shanks has cemented himself as one of the most impressive fighters in the entire One Piece series, especially since he is at the top tier of strength despite not even having a Devil Fruit. This means that Shanks has gotten to this level through his mastery of all facets of Haki alone.

Though his Conqueror's Haki is the one that is most talked about, Shanks is a master of Armament Haki as well, which could be seen with how effortlessly he managed to defeat Eustass Kid and his entire crew with just a single hit. Because of his prowess with this power, Shanks was able to rise up to the level of a Pirate Emperor.

9 Most Advanced Haki Users In One Piece
9 Most Advanced Haki Users In One Piece

These Haki users are the best of the best in One Piece.

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Mihawk's Armament Haki Has Given Him A Legendary Black Blade

The World's Strongest Swordsman

Just like Shanks, Mihawk has grown in strength to become one of the strongest characters in the entire series due to his mastery of Haki alone, since he doesn't have a Devil Fruit. Although the two are equal rivals according to most measures, many believe that Mihawk's Armament Haki is stronger than that of Shanks, purely because of the difference in their weapons.

Mihawk wields Yoru, a legendary blade belonging to the 12 Supreme Grade Weapons of the series. What stands apart here is that Yoru has become a Black Blade, which is a phenomenon caused when a weapon is imbued with so much Armament Haki over the years that it is permanently stained black and becomes far stronger. Because of this alone, many believe Mihawk's Armament Haki is better.

Gol D. Roger Was One Of The Strongest Of All Time

The Pirate King

The case to be made for Roger's incredible Armament Haki is the same as that of Shanks, which is that he was able to rise to the top level of power in the world due to his mastery of Haki alone. However, many believe that this power of his came purely from Conqueror's Haki and Conqueror's Coating.

While they do play a huge part, Roger was shown to be incredibly gifted with his Armament Haki abilities, as he was able to stand up to powerful opponents using just this power. Even against Domi Reversi'd Rocks, Roger masterfully coated his sword with Armament Haki, which many believe gave him incredible power in the fight.

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Garp Imbued His Fists With The Power Of Armament Haki

The Marine Hero

As the greatest Marine of all time, it should come as no shock to anyone that Garp is a master of Haki. He has been chasing after rogue pirates his entire career and was active during the time of legends like Roger and Rocks, so it facilitated Garp's legendary resolve, status, and power.

Although, just like Roger, Garp relied more on his effectiveness with Conqueror's Haki and Conqueror's Coating, he was still a monster when it came to Armament Haki, as could be seen with how he managed to put down Don Chinjao later on in his career as well as his performance during the Marineford War.

Rocks D. Xebec Was The Strongest Of The Old Era

The Legendary Pirate

As far as the Old Era of One Piece goes, it's clear that Rocks was the strongest of them all, albeit not by much. As the greatest pirate of all time according to many, Rocks' power was hailed as terrifying, and though he was always in pursuit of two specific Devil Fruits, his strength only ever came from his incredible Haki.

Rocks was most likely the one to own the title of World's Strongest Swordsman before Mihawk, and his swordsmanship was likened more to cannonballs instead of slashes or cuts. Because of this, his Armament Haki can be seen as being incredibly oppressive and powerful, as it was strong enough to damage even the sturdiest of Giants.

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Ryuma Likely Had The Greatest Armament Haki Of All Time

The God of the Blade

As the 'God of the Blade', Ryuma's legend has persisted for centuries. He was known as Wano's greatest swordsman who was able to defend its borders against the World Government and all other manner of threats for as long as he was alive, which easily puts him as one of the most legendary and powerful characters of all time.

His weapon of choice was the infamous sword Shusui; a Great Grade Blade that is also one of the only two known Black Blades in the setting so far. Because of this, it's unnaturally heavy, unruly, and destructive, so only the strongest and most skilled swordsmen can wield it. This, of course, happened due to Ryuma imbuing it with his Armament Haki for all this time, making him likely the strongest user of this power in all of One Piece.

One Piece can be streamed on Crunchyroll.

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One Piece
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Release Date
October 20, 1999
Network
Fuji TV
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  • Cast Placeholder Image
    Mayumi Tanaka
    Monkey D. Luffy (voice)
  • Cast Placeholder Image
    Kazuya Nakai
    Roronoa Zoro (voice)

WHERE TO WATCH

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One Piece is a Japanese manga written and illustrated by Eiichiro Oda. The series follows protagonist Monkey D. Luffy and his Straw Hat Pirate crew as they explore the Grand Line to find the King of the Pirates' ultimate treasure, the One Piece, in order to become the next king. The manga's popularity helped it spin off into a larger media franchise, including an anime with more than 1,000 episodes.

Studio
Toei Animation
Based On
Manga
Number of Episodes
1122
MyAnimeList Score
8.72