Haki is an extremely special power that dwells within all those who live in the One Piece world. However, very few are able to make use of its true potential. To put it simply, Haki is a person's willpower or ambition. Through rigorous training, anyone can utilize this power to strengthen themselves.

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Haki is mainly divided into two types: Color of Arms Haki, also known as Armament Haki; and Color of Observation Haki, or simply Observation Haki. A rare third type of Haki, called Conqueror's Haki, also exists in very few characters in One Piece. Each of these main types has subtypes as well — here's everything fans need to know about these types of power.

Updated on May 17, 2024, by Rei Penber: Haki has been growing in terms of importance in One Piece ever since the timeskip of the series. Right now, it can be said that Haki is one of the most important powers in the series, along with Devil Fruits, and of course, scientific abilities. In the final saga of One Piece, Oda has explored the concept of Haki even more. There have been many intriguing Haki users, and, consequently, Oda has introduced many new ways that the fans have seen it being used in the series over the years. As a result, Haki, which has many facets, is ever-evolving and so is this article. Given all the new information that Oda has provided fans pertaining to Haki, this list has now been updated, along with added weaknesses, and strongest users.

Observation Haki

A Sixth Sense Ability in One Piece

Observation Haki is known to be the most basic form of Haki. It grants heightened senses akin to a sixth sense, and even grants the power of precognition to a certain extent. This power appeared on several occasions in the story, before being finally explained by Silvers Rayleigh before the timeskip.

On Skypiea, Observation Haki is known as Mantra. Observation Haki appears to be the most layered form of Haki, and it has the widest range of applications among the various types.

Sub-Type 1: Presence, Emotion, Intent Sensing

Observation Haki grants a sixth sense to a person, and thus allows them to sense someone's presence without even actually seeing them. At the same time, it also allows people to sense the emotions of others. For example, Sanji could hear the tears of a woman falling from a mile away on Punk Hazard.

What's more, with the right mastery, Observation Haki also lets people sense other people's intentions. When Luffy and Yamato met, for example, Luffy was immediately able to tell that Yamato wouldn't hurt him because he sensed no malice.

Sub-Type 2: Strength Gauging

Observation Haki can also allow the user to gauge the strength of other people. Using Observation Haki, one can make an estimate of the difference in strength between themselves and a potential opponent.

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Fans saw an example of this on Zou, where Luffy was able to tell that Inuarashi was very powerful without even fighting him or seeing him in combat. Evidently, Luffy used his Observation Haki to gauge Inuarashi's strength and was surprised to hear that Jack was able to defeat him.

Sub-Type 3: Future Sight

Quite possibly the most advanced form of Observation Haki is the Future Sight. A person myst train their Haki to the extreme in order to attain this power. Eventually, it allows them to see some seconds ahead into the future itself, making it an incredibly powerful ability.

Charlotte Katakuri of the Big Mom Pirates was the first person seen to use this ability, and used it to thoroughly study Luffy in their fight. Consequently, Luffy managed to learn how to see the future as well.

Best Observation Haki Users

Being a very layered power, Observation Haki has different users who excel at different subtypes of this power. When it comes to sensing emotions, Sanji of the Straw Hat Pirates is one of the very best users of the ability, as seen on various occasions across Punk Hazard, Dressrosa, Whole Cake Island, and even Wano.

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Along with him, the Navy Admiral Fujitora is also considered to be among the very best users of this type of Haki. When it comes to Future Sight, Charlotte Katakuri is quite easily the best user of the power, having had complete mastery over it for years. In fact, before his fight against Luffy, Katakuri hadn't been hit for years. Luffy, the Captain of the Straw Hat Pirates, excels at both sensing emotions and seeing the future at the same time.

Observation Haki Weakness

Standard Weaknesses: The standard weakness of Observation Haki is the fact that one needs to be absolutely calm for it to work perfectly. If one’s calm state of mind is disturbed, Observation Haki will not work at all. This is evident in the story on many occasions, such as when Luffy fought against Katakuri and the latter had his peace of mind disturbed. Even though Katakuri could see the future, once he was disturbed, he couldn't even predict Luffy's basic attacks or dodge them. As long as the user of Observation Haki is calm, they can utilize this ability to the very best. This is precisely why Observation Haki users are especially calm and composed in combat and do not panic in the face of danger. They need to be composed and confident to be able to use this ability to the very fullest.

Another weakness of observation Haki is the fact that it cannot contend against high speed. While Observation Haki can allow a user to perceive an attack or, in some cases, even see the future, if their body isn't fast enough to react to what they are seeing, they will still be hit by the incoming attack. This means that the user absolutely needs to train their body to keep up with their perception of danger, otherwise, having this ability doesn't grant as much of an advantage in battle.

Observation Haki's standard weaknesses are things that can be avoided. However, one great weakness of this power comes through another subtype of a different type of haki, and that is Observation Killing. So far, there is only one individual in One Piece who is known to have this ability, and that is Shanks. This power, as the name implies, has the ability to kill observation haki. So far, it is implied that Observation Killing can only kill future sight, and that is the ability of an individual to see into the future using advanced Observation Haki.

However, the name itself implies that it can kill the basic version of Observation Haki as well. It is unclear as to how powerful this ability truly is, and fans will have to wait to see if it can actually kill regular Observation Haki as well, or not. Regardless, this is a very overpowered ability in One Piece, and this is one of the many reasons why Shanks is considered to be among the strongest individuals in the series, if not the strongest.

Armament Haki

The Power To Attack and Defend

Armament Haki is arguably the most useful form of Haki in One Piece, as it allows the user to manifest their spirit invisibly. They can then use it in both offensive and defensive ways by coating their bodies with it.

The biggest advantage of Armament Haki is that it lets the user bypass whatever protection that a Devil Fruit offers, such as the rubbery nature of Luffy's Gomu Gomu no Mi or the flame body offered by the Mera Mera no Mi. Armament Haki is often shown to harden, although whether this strengthens the Haki is up for debate.

Sub-type 1: Basic Coating/Imbuement

Armament Haki has many subtypes, and the most basic of them is the regular coating and imbuement. Coating simply means that one manifests their spirit, and coats their entire body or a specific part of their body in it. This spirit is usually invisible. As explained by Rayleigh, Haki is an invisible armor that boosts both offense and defense greatly. However, it doesn't necessarily have to be that way.

The spirit can also be hardened. This is usually just an indicator of Armament Haki that Oda has put in his story to showcase this power being used. Essentially, whenever Hardening is used, the part it is being imbued in turns black. Usually, Armament Haki is imbued in just a particular body part, however, there are some individuals in the One Piece world who use it on their entire body. There is another subtype of Armament Haki, which is Imbuement. Simply put, Imbuement means to put one's Haki in something that they're holding, likely a katana. For instance, Sabo often imbues his metal pipe with Haki to increase its strength and make it a lethal Weapon. Zoro imbues his swords with Armament Haki. Any weapon can be imbued with Haki, which, in turn, increases its durability, and offensive capabilities.

Sub-Type 2: Ryou Emission

Ryou is an advanced usage of Armament Haki which is commonly used by the people of Wano. Although Ryou emission simply means Haki to them, its usage is very different. It allows the user to let Haki flow through their body calmly and emit it from one point, allowing them to break through even the toughest of defenses.

This form of Haki is, thus, better when compared to regular Armament Haki.

Sub-Type 3: Internal Destruction

Internal Destruction is a very advanced form of Armament Haki that is available to only a handful of people in the One Piece world. This form of Haki works the same as Ryou. The only difference is that it destroys the target from within, dealing internal damage without having to pierce the exterior.

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As such, this form of Haki is much more powerful. It's strong enough to destroy even the explosive collars of the Celestial Dragons.

Best Armament Haki Users

Armament Haki isn't nearly as layered as Observation Haki and, usually, grows is considered to be strong in all the elites. However, there are some characters whose Haki is known to be extremely powerful. According to Trafalgar Law, Yonko Kaido and Big Mom have tremendous Haki and he cannot move them with his Ope Ope no Mi powers.

At the same time, both Kaido and Big Mom are users of Ryuo, an advanced form of Haki. Rayleigh is an exceptionally good user of Internal Destruction Haki, as is Luffy, who managed to pick this technique up in Wano Country. Kozuki Oden was one of the very best users of this type of Haki and his Ryuo was feared even by the likes of Yonko Kaido. Some other exceptional users of this power are Gol D. Roger, Whitebeard, Garp, and even the Admirals of the Navy.

Conqueror's Haki

The Ability to Impose Willpower

Also known as The Supreme King Haki, Conqueror's Haki is a special power that only a handful of people are born with. It is believed that one in a million people possess this power, making it extremely fearsome.

On a basic level, Conqueror's Haki allows the user to show off their willpower by imposing it on others. Those with weaker will pass out immediately without even being touched. Although not as layered as Observation Haki, Conqueror's Haki has many applications.

Sub-Type 1: Domination And Pressure

In addition to knocking people out as mentioned above, Conqueror's Haki also lets the person dominate the spirit of others and tame them, mostly seen with animals. With it, Luffy was able to tame Uucy in Dressrosa, and even Surume on the way to Fishman Island.

Another application of Conqueror's Haki is the ability to generate pressure, which can be seen when two Conqueror's Haki users clash. The pressure generated usually damages the environment around them. Shanks was able to damage Whitebeard's ship without even touching it. What's more, when two elite users of Conqueror's Haki clash, the pressure generated results in the heavens splitting apart.

Sub-Type 2: Infusion

Conqueror's Haki can also be infused into the attacks of the user, making them incredibly powerful. This was explained in the Wano Country arc when Luffy fought Kaido. According to Kaido, only the very strongest people can manage to do this and even fewer can do it with skill.

Kaido infuses Conqueror's Haki in almost all his techniques, such as Thunder Bagua or Ragnaraku. After watching him use this power, Luffy also managed to learn its usage, however, his version was much cruder. In addition to those two, Yamato, Roger, Whitebeard, and Big Mom have been seen using Conqueror's Haki infusion.

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Sub-Type 3: Observation Killing

Observation Killing is an incredible application of Conqueror's Haki that only Shanks is known to be capable of using. Essentially, Shanks can use his aura to somehow falter his opponents and prevent them from seeing into the future or, possibly, entirely using Observation Haki at all. This makes it an incredibly dangerous subtype of Conqueror's Haki that can be a defining factor in combat.

Right now, much about this power remains unclear, however, as the character of Shanks gets explored further, fans will likely find out more about him and all the powers that he possesses.

Sub-Type 4: Long-range Haki

Another subtype of Conqueror's Haki is the long-range Haki that fans have seen Shanks utilize in the story once. This ability is unique to Shanks and no other user of Conqueror's Haki has displayed this level of control over this power. Essentially, Shanks can send bolts of Conqueror's Haki from miles away directly to his target. These bolts of Conqueror's Haki aren't just for intimidation as they can paralyze someone as strong as a Marine Admiral within the blink of an eye.

In fact, Shanks can even somehow communicate from miles away using his Conqueror's Haki. This was indicated by the fact that Greenbull could clearly hear him through his Haki. Furthermore, this type of Haki also forced Green Bull out of his Woods Man form and that just goes to show how dangerous a power this is.

Best Conqueror's Haki Users

Conqueror's Haki is the rarest of all types of Haki in One Piece and only a few people possess it in the New World, implying that there are even fewer people who have a full mastery of this power. So far, Kaido appears to be a great user of advanced Conqueror's Haki, as evident from his usage of techniques such as Thunder Bagua and Ragnaraku. Big Mom, another Yonko, is just as good a user of Conqueror's Haki, however, she doesn't seem to use it as often.

Other notable users of Conqueror's Haki include Monkey D. Luffy, Yamato, and Roronoa Zoro. While Shanks hasn't shown his true power to the fans just yet, he is presumed to be an extremely powerful user of Conqueror's Haki - perhaps the strongest of them all. In the past, Gol D. Roger and Whitebeard also displayed tremendous skill with the usage of Conqueror's Haki.

Conqueror's Haki Weakness

Conqueror's Haki doesn't really have many weaknesses. The basic form of Conqueror's Haki surely has a big weakness and that is the opponent themselves being strong. If the opponent is strong enough, then they will not be affected by Conqueror's Haki at all, which makes this ability completely redundant. However, Conqueror's Haki Infusion is a power that strengthens the user greatly. There is no great weakness to this power.

However, just like our Armament Haki, this power can be depleted. In fact, it can be said that this power depletes at a much faster rate, given that it is more potent. It is also much more difficult to control, given that when Luffy awakened it, Kaido called his usage of it quite rough. Zoro being able to utilize his Conqueror's Haki Infusion only for a handful of minutes seems to imply that this power takes quite a toll on the user's body, and that the strain is simply too great. It can deplete way too quickly, and once that happens, the user is either knocked out, or they can even die, as Zoro claimed himself. Recently, One Piece also introduced the concept of immortality among the stronger individuals, such as the Five Elders. It appears that Conqueror's Haki doesn't do sustainable damage to those wielding it. Other than that, Conqueror's haki does not seem to have many weaknesses and is one of the strongest abilities in the series.

One Piece (1999)

Creator

Eiichiro Oda

Studio

Toei Animation

Number of Episodes

1082+

Streaming Service(s)

Crunchyroll , Netflix , Hulu

See at Hulu