Post by Naruto on Aug 20, 2006 11:17:16 GMT -5
In the Naruto anime and manga series, a kekkei genkai (Ѫ¾@ÏÞ½ç, "blood inheritance limit" or "[an ability] limited to blood inheritance," also called a "bloodline limit," "advanced bloodline," or "bloodline trait") is any property passed down genetically through a specific clan that cannot be imitated or duplicated by any method, although it might be possible to copy it using genetic manipulation. Kekkei genkai are often beneficial, and are employed commonly by shinobi to improve their chances in battle or other challenging situations.
The eagerness with which the rulers of nations have taken advantage of shinobi with bloodline limits for the purposes of furthering war efforts has taken its toll on their reputation, to such a degree that many in the Naruto world automatically associate bloodline limits with war and pain. It eventually reached the point of outright fear and hatred, resulting in witch hunts and systematic murders of families and individuals with bloodline limits, as was the case with Haku's tragedy.
Byakugan
Neji Hyuga's Byakugan.The Byakugan (°×ÑÛ, literally "White Eye", Viz "Evil Eye") is a special pupil condition (D¨jutsu Í«Ðg, "eye technique") that naturally occurs in members of the Hyuga clan (and thus only characters from the Hyuga clan possess it).
Although it seems the abilities of the Byakugan are inferior to those of the Sharingan (believed to be its genetic relative) because it cannot copy techniques that it sees or hypnotize human targets, in terms of insight the former surpasses the latter, as stated by Kakashi during the Ch¨±nin exams.
A person with the Byakugan has a nearly 360 degree field of vision, except for a small blind spot behind the first thoracic vertebrae (near the back of the neck), which is its only known weakness. Byakugan users can detect anything around them within a 50-meter radius (although later in the manga Neji Hyuga manages to increase the radius to 800 meters), making them close-range combat experts. The Byakugan also gives the user the ability to see through basically any matter over extremely long distances. This seems to be a combination of x-ray and thermographic vision, as it has been noted that objects can be difficult to see if their temperature is the same as the objects around them. A small degree of telescopic vision is also present, as a Byakugan user can focus on a single object at any point within their range of vision. The degree of focus seems to be dependent on the skill of the user. The Byakugan's sight cannot be blocked (except in the case of something like Ranmaru's kekkei genkai ability), unlike the Sharingan, which can be blocked by any sufficiently non-transparent substance, making it useful for searching, tracking, and identifying targets. It is however, possible to impede it slightly through the use of certain powerful seals.
One of the most powerful aspects of the Byakugan is the ability to see the inner chakra coil system, which is the key aspect of using Gentle Fist to attack the system. If sufficiently developed, the Byakugan is able to see individual chakra points, potentially allowing the user to shut off the opponent's chakra flow completely, such that the opponent cannot perform techniques that require chakra. Seasoned Byakugan users are even capable of killing with a single blow.
Protection of the Byakugan ability is very important to the Hyuga clan, and has led to the development of an elaborate family hierarchy. The Hyuga clan is divided into two houses: the main house (×Ú¼Ò, s¨-ke) and the branch house (·Ö¼Ò, bun-ke). The branch house's main purpose is to protect the main house and the secrets of the Byakugan. Branch house members' abilities and freedom are restricted through the means of a cursed seal. The cursed seal is placed on a branch house member's forehead. Through the means of a special technique that only main house members know, the seal can be activated. When the cursed seal is activated, the person's brain cells will be destroyed. Through the use of the cursed seal, the main house makes the branch house subordinate to its wishes. In addition, whenever a branch house member dies, the cursed seal will also seal the Byakugan ability so that enemies will not be able to discover the secrets of the bloodline limit if Konoha's hunter-nin were unable to find and dispose the body before the enemy found it.
There are several techniques developed specifically for Byakugan users, which complement and make use of the Byakugan's abilities -- most notable among which are the defensive barrier technique Eight Trigram Palms Heavenly Spin and the high-speed precision attack Eight Trigrams Sixty-Four Palms. Both Hinata and Neji have developed more powerful variants of these techniques.
Hyoton
Young Haku manipulating water in the anime.Haku's kekkei genkai, Hyoton ("Ice Release", dubbed "Haku's Secret Arts of Water" by Viz) allowed him to combine wind and water-based chakra to create ice, which he could manipulate through willpower alone, as seen in the anime from a flashback where he was manipulating water in his hands and again when he uses water to create a field of icicles through his house by freezing water.
Using his special ability, Haku developed a number of powerful techniques. His most powerful technique, Demonic Ice Mirrors, allowed him to surround an opponent with an array of ice mirrors and attack them at an incredible speed. He developed Thousand Flying Water Needles of Death, which only required one hand to perform the seals. With it, he could create a thousand needles out of water and send them at his opponent.
Mokuton
The First Hokage utilizing a Mokuton jutsu.The Mokuton (Wood Release) techniques are initially used by the First Hokage, and it is said that because of his unique ability he was chosen as the First. Yamato, who received DNA from the First as a result of an experiment done by Orochimaru, also demonstrates the ability to use Mokuton jutsu. Mokuton techniques are performed by combining earth and water-based chakra simultaneously, thus causing trees to grow from any location the user wishes (including himself, as demonstrated by Yamato's ability to branch wood clones off of himself). The shape can also be controlled to a fine degree, allowing makeshift structures to be grown quickly in battle. During a mission with Team 7, Yamato actually grew the team a log house using his Mokuton ability for camping purposes.
A secondary, and not necessarily related, skill is the First's ability to control biju, which Yamato also gained. With this ability, Yamato can forcibly reverse Naruto's Kyubi transformation. Tsunade's incredibly valuable necklace, which Naruto currently possesses, is said to help enhance this particular skill.
Ranmaru's kekkei genkai
RanmaruRanmaru, from the filler arc of the anime, has a kekkei genkai ability similar to the Byakugan and Zetsu's spying technique, but arguably better than both. Its powers allow him to see through solid objects and create illusions with real chakra circulatory systems. It also allows him to interfere with the workings of the Byakugan, and has other vaguely-defined powers regarding vision. When activated, Ranmaru's eyes momentarily glow red. Not much else is known about his bloodline limit.
Sharingan
Kakashi's fully matured Sharingan.The Sharingan (д݆ÑÛ, literally "Copy Wheel Eye", English manga "Mirror Wheel Eye") is a special type of pupil condition that naturally occurs in all members of the Uchiha clan, though not all of them gain the ability to use it. Itachi hints at some dark ultimate purpose behind the Sharingan, which both he and Sasuke apparently know, but the series has yet to reveal exactly what that purpose is. The Sharingan is thought to be descended from the Byakugan, but grants the user different abilities and a different insight; which includes the ability to observe the movement and flow of chakra (although not to the same extent and clarity as the Byakugan).
The Sharingan's first and most well known ability is to memorize any technique that it witnesses. It can memorize ninjutsu, genjutsu, and taijutsu with perfect accuracy, allowing the user to use the techniques as his own. In order to reproduce copied jutsu, however, one must have the necessary skill or ability to perform them. A prime example is Rock Lee's brand of taijutsu. While Sasuke was able to copy some of Lee's moves, they put a much more significant strain on him since he hasn't trained nearly as hard as Lee has. In addition to physical skill, the Sharingan cannot allow the user to reproduce any other bloodline abilities or summon a creature the user has not made a contract with, because the user of the Sharingan has to have the same blood as the one they are copying.
The Sharingan also grants the user incredible clarity of perception, allowing them to track fast moving objects with great clarity and predict their opponent's action. This perception is so great that it can even see through genjutsu and reverse it, depending upon the skill of the user.
Finally, the Sharingan is capable of a unique brand of hypnosis that involves suggesting actions and thoughts to the opponent. When used in conjunction with the other aspects of the Sharingan, this allows the user to copy and use an opponent's technique before they can actually execute it.
Sasuke's evolving Sharingan.The Sharingan does not automatically appear from birth in a user; instead, it will usually appear when the user is in a life-threatening situation, where the power of the Sharingan could save the user. After this first appearance, the user can then call up the Sharingan any time he or she pleases. (Due to its unique nature, Kakashi's Sharingan is "permanently on", and thus he usually covers it to conserve chakra.) The power of the Sharingan is judged through the number of tomoe in the eye, known as the "tomoe seal". It is not unheard of for a Sharingan user to have different amounts of tomoe in each eye. For example, Sasuke's Sharingan initially had two tomoe in one eye and one in the other. Upon his first regular activation of it, it had evolved to two tomoe in each eye, then three during his battle with Naruto at the Valley of the End. A fully-matured Sharingan has three tomoe in each eye.
It is possible to transplant Sharingan eyes from one person to another, as occurred with Kakashi and his deceased comrade Obito. However, transplanted eyes do not work as well in a non-Uchiha body, causing more strain on the user, as is the case with Kakashi - extended use of his Sharingan will cause him to collapse. Uchiha clan members are not burdened with this weakness; while activation of the Sharingan does consume chakra, the drain is so small as to be almost insignificant. Itachi in particular seems to have no trouble keeping his Sharingan activated near-constantly.
Characters who currently possess the Sharingan include Sasuke Uchiha, Itachi Uchiha, and Kakashi Hatake. Kakashi's eye was given to him by Obito Uchiha, one of his teammates in his original three-man ninja team. Obito developed it in battle against rival Rock shinobi and during this battle Kakashi lost his left eye when he was attacked, hence his scar. Near the end of the battle Obito's right side is crushed under a giant rock, and as his last act Obito had Rin, a medical ninja, remove his left eye and implant it in Kakashi's left eye, thus allowing Kakashi to use the Sharingan even though he does not have Uchiha blood. This is also why only his left eye is a Sharingan eye.
Mangekyo Sharingan
Itachi's Mangeky¨ Sharingan.The Mangekyo Sharingan (ÍòÈAçRд݆ÑÛ, literally "Kaleidoscope Copy Wheel Eye") is a heightened form of Sharingan. The Mangekyo Sharingan is distinguished from a normal Sharingan through its appearance, which changes the form of the tomoe seal. However, unlike the Sharingan, it may have a different appearance between users, as Kakashi's version is significantly different than Itachi's. Those who have the potential to obtain it must make a great sacrifice in order to obtain it ¨C according to Itachi, they must kill their best friend. Itachi does in fact do this to obtain his version, but Kakashi has noted that everyone he cared about had died long before the start of the series, so how he developed his own variant is unknown. It has also been implied in the manga that use of the Mangekyo Sharingan may deteriorate the user's normal eyesight.
In the long history of the Uchiha clan, only a few have been able to obtain the Mangekyo Sharingan. At present, there are only two people who can use the Mangekyo Sharingan, Itachi being one and Kakshi being the other. According to Itachi, if his younger brother Sasuke obtained it, the number of people who could handle the Mangekyo Sharingan (including himself) would be three. Itachi's statement may suggest that there is (or was at that time) another Mangekyo Sharingan user somewhere; however, Itachi uses the verb atsukau (’Q¤¦) which means "to handle" or "to deal with", which could also mean that there are only three people left who are capable of acquiring the Mangekyo Sharingan. Given that Itachi had just killed every other member of the Uchiha clan, this statement could simply be taken as a matter of fact: Kakashi, Sasuke, and Itachi were the only known characters left alive with Sharingan eyes, so no one else had the potential to obtain it.
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Omae ga kaigan sureba... Ore o fukume Mangeky¨ Sharingan o atsukau mono wa sannin ni naru
"If you activate it... Including me, the number of people who can handle the Mangekyo Sharingan will be three" - Itachi to Sasuke (Original Japanese version)
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Itachi's Mangekyo Sharingan
Itachi Uchiha gained the Mangekyo Sharingan by killing his best friend, Shisui Uchiha. With the Mangekyo Sharingan, Itachi is able to use the two most powerful jutsu of the Uchiha clan, Tsukuyomi, a genjutsu of unrivaled power and effectiveness, and Amaterasu, a ninjutsu capable of burning through even the strongest of materials.
Kakashi's Mangekyo Sharingan
Kakashi's Mangekyo Sharingan.Kakashi Hatake developed his own version of the Mangekyo Sharingan, presumably during the timeskip. Unlike Itachi's version, which is used to destroy a target, Kakashi uses his to create a localized interdimensional spacetime warp, allowing him to target any object and send it to another dimension, achieving the same result. Kakashi used this new jutsu to warp a segment of Deidara's right arm into a different dimension. He subsequently uses it again in Chapter 278 to counter Deidara's ultimate move, which would otherwise level the entire forest they were fighting in. The attack requires considerable effort to aim precisely and appears to leave Kakashi's chakra significantly drained; he collapses after using the technique three times (compared to his other original move, Raikiri, which he can use four times a day).
The appearance of the pupil and tomoe in Kakashi's Mangekyo Sharingan differ from that of Itachi's; Kakashi's looks more like a pinwheel. Before this was shown, it was thought that one had to kill their best friend to acquire the Mangekyo Sharingan. Kakashi stated long before developing his Mangekyo Sharingan that everyone close to him was already dead. The only known now-deceased person that could be described as his "closest friend" was Obito, who died shortly after Kakashi received his Sharingan eye. While Kakashi may have felt responsible for Obito's death at the time, he certainly didn't kill Obito himself, and it wouldn't explain why it took him so many years to obtain the Mangekyo Sharingan. Thus, the means behind its development and the actual meaning of the "requirement" are currently unknown.
Shikotsumyaku
The Kaguya Clan's kekkei genkai.Shikotsumyaku (ËÀ¹ÇÃ}, literally "Dead Bone Pulse", according to Databook 2) is the kekkei genkai of the extinct Kaguya clan that gave them the frightening ability to manipulate their own bone structure. They could protrude them out of their bodies, fire them like bullets from their fingertips, or even create a layer of bone under the skin to serve as armor. All this makes their bodies virtually indestructible and gives them a nearly perfect defense, since any point of contact can almostly instantly become as sharp as a spear. However, the ability seems rare among clan members, as Kimimaro Kaguya was the only one seen to possess it out of his entire clan. The Kaguya clan's most powerful techniques utilize this ability in their many sword dances, named after flowers. After they started a war against Kirigakure, they were almost completely wiped out. Kimimaro was the only survivor. He is now deceased, having succumbed to a lethal disease during his battle with Gaara.
Souma no Kou
Sakon and Ukon.Sakon and Ukon of the Sound Four have the ability to unify some or all of one's body with the other's body with Souma no Kou ("Attack of an Evil Spirit Pair"). Typically, Ukon is dormant in Sakon's body, with his head protruding from the back of Sakon's neck. In heated battles, Ukon can lend his arms or legs (literally) to add force to Sakon's physical attacks, and even split completely into two bodies. Ukon can also merge with an opponent's body with Parasite Demon Demolition Technique, gradually killing his new host.
Possible kekkei genkai
Kibaku Nendo
DeidaraDeidara possesses mouths in the palms of his hands, which is probably a bloodline limit or just hijutsu. The mouths can chew up clay and sculpt it into a number of artistic, and usually explosive, forms, thus the name Kibaku Nendo ("Exploding Clay"). Deidara can create clay and make the clay explode by saying "Katsu" (ºÈ).
Satetsu
The Third Kazekage had a special genetic trait that allowed him to turn the chakra he molded into magnetic forces. This ability allowed him to create his Iron Sand, based on the jutsu used by the previous host of Shukaku. This ability was "inherited," and likely made more deadly through the addition of poison, by Sasori in his Kazekage puppet. It is unknown if this was a kekkei genkai, or wholly unique to the Third, similar to the First Hokage's ability to perform Mokuton jutsu.
The eagerness with which the rulers of nations have taken advantage of shinobi with bloodline limits for the purposes of furthering war efforts has taken its toll on their reputation, to such a degree that many in the Naruto world automatically associate bloodline limits with war and pain. It eventually reached the point of outright fear and hatred, resulting in witch hunts and systematic murders of families and individuals with bloodline limits, as was the case with Haku's tragedy.
Byakugan
Neji Hyuga's Byakugan.The Byakugan (°×ÑÛ, literally "White Eye", Viz "Evil Eye") is a special pupil condition (D¨jutsu Í«Ðg, "eye technique") that naturally occurs in members of the Hyuga clan (and thus only characters from the Hyuga clan possess it).
Although it seems the abilities of the Byakugan are inferior to those of the Sharingan (believed to be its genetic relative) because it cannot copy techniques that it sees or hypnotize human targets, in terms of insight the former surpasses the latter, as stated by Kakashi during the Ch¨±nin exams.
A person with the Byakugan has a nearly 360 degree field of vision, except for a small blind spot behind the first thoracic vertebrae (near the back of the neck), which is its only known weakness. Byakugan users can detect anything around them within a 50-meter radius (although later in the manga Neji Hyuga manages to increase the radius to 800 meters), making them close-range combat experts. The Byakugan also gives the user the ability to see through basically any matter over extremely long distances. This seems to be a combination of x-ray and thermographic vision, as it has been noted that objects can be difficult to see if their temperature is the same as the objects around them. A small degree of telescopic vision is also present, as a Byakugan user can focus on a single object at any point within their range of vision. The degree of focus seems to be dependent on the skill of the user. The Byakugan's sight cannot be blocked (except in the case of something like Ranmaru's kekkei genkai ability), unlike the Sharingan, which can be blocked by any sufficiently non-transparent substance, making it useful for searching, tracking, and identifying targets. It is however, possible to impede it slightly through the use of certain powerful seals.
One of the most powerful aspects of the Byakugan is the ability to see the inner chakra coil system, which is the key aspect of using Gentle Fist to attack the system. If sufficiently developed, the Byakugan is able to see individual chakra points, potentially allowing the user to shut off the opponent's chakra flow completely, such that the opponent cannot perform techniques that require chakra. Seasoned Byakugan users are even capable of killing with a single blow.
Protection of the Byakugan ability is very important to the Hyuga clan, and has led to the development of an elaborate family hierarchy. The Hyuga clan is divided into two houses: the main house (×Ú¼Ò, s¨-ke) and the branch house (·Ö¼Ò, bun-ke). The branch house's main purpose is to protect the main house and the secrets of the Byakugan. Branch house members' abilities and freedom are restricted through the means of a cursed seal. The cursed seal is placed on a branch house member's forehead. Through the means of a special technique that only main house members know, the seal can be activated. When the cursed seal is activated, the person's brain cells will be destroyed. Through the use of the cursed seal, the main house makes the branch house subordinate to its wishes. In addition, whenever a branch house member dies, the cursed seal will also seal the Byakugan ability so that enemies will not be able to discover the secrets of the bloodline limit if Konoha's hunter-nin were unable to find and dispose the body before the enemy found it.
There are several techniques developed specifically for Byakugan users, which complement and make use of the Byakugan's abilities -- most notable among which are the defensive barrier technique Eight Trigram Palms Heavenly Spin and the high-speed precision attack Eight Trigrams Sixty-Four Palms. Both Hinata and Neji have developed more powerful variants of these techniques.
Hyoton
Young Haku manipulating water in the anime.Haku's kekkei genkai, Hyoton ("Ice Release", dubbed "Haku's Secret Arts of Water" by Viz) allowed him to combine wind and water-based chakra to create ice, which he could manipulate through willpower alone, as seen in the anime from a flashback where he was manipulating water in his hands and again when he uses water to create a field of icicles through his house by freezing water.
Using his special ability, Haku developed a number of powerful techniques. His most powerful technique, Demonic Ice Mirrors, allowed him to surround an opponent with an array of ice mirrors and attack them at an incredible speed. He developed Thousand Flying Water Needles of Death, which only required one hand to perform the seals. With it, he could create a thousand needles out of water and send them at his opponent.
Mokuton
The First Hokage utilizing a Mokuton jutsu.The Mokuton (Wood Release) techniques are initially used by the First Hokage, and it is said that because of his unique ability he was chosen as the First. Yamato, who received DNA from the First as a result of an experiment done by Orochimaru, also demonstrates the ability to use Mokuton jutsu. Mokuton techniques are performed by combining earth and water-based chakra simultaneously, thus causing trees to grow from any location the user wishes (including himself, as demonstrated by Yamato's ability to branch wood clones off of himself). The shape can also be controlled to a fine degree, allowing makeshift structures to be grown quickly in battle. During a mission with Team 7, Yamato actually grew the team a log house using his Mokuton ability for camping purposes.
A secondary, and not necessarily related, skill is the First's ability to control biju, which Yamato also gained. With this ability, Yamato can forcibly reverse Naruto's Kyubi transformation. Tsunade's incredibly valuable necklace, which Naruto currently possesses, is said to help enhance this particular skill.
Ranmaru's kekkei genkai
RanmaruRanmaru, from the filler arc of the anime, has a kekkei genkai ability similar to the Byakugan and Zetsu's spying technique, but arguably better than both. Its powers allow him to see through solid objects and create illusions with real chakra circulatory systems. It also allows him to interfere with the workings of the Byakugan, and has other vaguely-defined powers regarding vision. When activated, Ranmaru's eyes momentarily glow red. Not much else is known about his bloodline limit.
Sharingan
Kakashi's fully matured Sharingan.The Sharingan (д݆ÑÛ, literally "Copy Wheel Eye", English manga "Mirror Wheel Eye") is a special type of pupil condition that naturally occurs in all members of the Uchiha clan, though not all of them gain the ability to use it. Itachi hints at some dark ultimate purpose behind the Sharingan, which both he and Sasuke apparently know, but the series has yet to reveal exactly what that purpose is. The Sharingan is thought to be descended from the Byakugan, but grants the user different abilities and a different insight; which includes the ability to observe the movement and flow of chakra (although not to the same extent and clarity as the Byakugan).
The Sharingan's first and most well known ability is to memorize any technique that it witnesses. It can memorize ninjutsu, genjutsu, and taijutsu with perfect accuracy, allowing the user to use the techniques as his own. In order to reproduce copied jutsu, however, one must have the necessary skill or ability to perform them. A prime example is Rock Lee's brand of taijutsu. While Sasuke was able to copy some of Lee's moves, they put a much more significant strain on him since he hasn't trained nearly as hard as Lee has. In addition to physical skill, the Sharingan cannot allow the user to reproduce any other bloodline abilities or summon a creature the user has not made a contract with, because the user of the Sharingan has to have the same blood as the one they are copying.
The Sharingan also grants the user incredible clarity of perception, allowing them to track fast moving objects with great clarity and predict their opponent's action. This perception is so great that it can even see through genjutsu and reverse it, depending upon the skill of the user.
Finally, the Sharingan is capable of a unique brand of hypnosis that involves suggesting actions and thoughts to the opponent. When used in conjunction with the other aspects of the Sharingan, this allows the user to copy and use an opponent's technique before they can actually execute it.
Sasuke's evolving Sharingan.The Sharingan does not automatically appear from birth in a user; instead, it will usually appear when the user is in a life-threatening situation, where the power of the Sharingan could save the user. After this first appearance, the user can then call up the Sharingan any time he or she pleases. (Due to its unique nature, Kakashi's Sharingan is "permanently on", and thus he usually covers it to conserve chakra.) The power of the Sharingan is judged through the number of tomoe in the eye, known as the "tomoe seal". It is not unheard of for a Sharingan user to have different amounts of tomoe in each eye. For example, Sasuke's Sharingan initially had two tomoe in one eye and one in the other. Upon his first regular activation of it, it had evolved to two tomoe in each eye, then three during his battle with Naruto at the Valley of the End. A fully-matured Sharingan has three tomoe in each eye.
It is possible to transplant Sharingan eyes from one person to another, as occurred with Kakashi and his deceased comrade Obito. However, transplanted eyes do not work as well in a non-Uchiha body, causing more strain on the user, as is the case with Kakashi - extended use of his Sharingan will cause him to collapse. Uchiha clan members are not burdened with this weakness; while activation of the Sharingan does consume chakra, the drain is so small as to be almost insignificant. Itachi in particular seems to have no trouble keeping his Sharingan activated near-constantly.
Characters who currently possess the Sharingan include Sasuke Uchiha, Itachi Uchiha, and Kakashi Hatake. Kakashi's eye was given to him by Obito Uchiha, one of his teammates in his original three-man ninja team. Obito developed it in battle against rival Rock shinobi and during this battle Kakashi lost his left eye when he was attacked, hence his scar. Near the end of the battle Obito's right side is crushed under a giant rock, and as his last act Obito had Rin, a medical ninja, remove his left eye and implant it in Kakashi's left eye, thus allowing Kakashi to use the Sharingan even though he does not have Uchiha blood. This is also why only his left eye is a Sharingan eye.
Mangekyo Sharingan
Itachi's Mangeky¨ Sharingan.The Mangekyo Sharingan (ÍòÈAçRд݆ÑÛ, literally "Kaleidoscope Copy Wheel Eye") is a heightened form of Sharingan. The Mangekyo Sharingan is distinguished from a normal Sharingan through its appearance, which changes the form of the tomoe seal. However, unlike the Sharingan, it may have a different appearance between users, as Kakashi's version is significantly different than Itachi's. Those who have the potential to obtain it must make a great sacrifice in order to obtain it ¨C according to Itachi, they must kill their best friend. Itachi does in fact do this to obtain his version, but Kakashi has noted that everyone he cared about had died long before the start of the series, so how he developed his own variant is unknown. It has also been implied in the manga that use of the Mangekyo Sharingan may deteriorate the user's normal eyesight.
In the long history of the Uchiha clan, only a few have been able to obtain the Mangekyo Sharingan. At present, there are only two people who can use the Mangekyo Sharingan, Itachi being one and Kakshi being the other. According to Itachi, if his younger brother Sasuke obtained it, the number of people who could handle the Mangekyo Sharingan (including himself) would be three. Itachi's statement may suggest that there is (or was at that time) another Mangekyo Sharingan user somewhere; however, Itachi uses the verb atsukau (’Q¤¦) which means "to handle" or "to deal with", which could also mean that there are only three people left who are capable of acquiring the Mangekyo Sharingan. Given that Itachi had just killed every other member of the Uchiha clan, this statement could simply be taken as a matter of fact: Kakashi, Sasuke, and Itachi were the only known characters left alive with Sharingan eyes, so no one else had the potential to obtain it.
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Omae ga kaigan sureba... Ore o fukume Mangeky¨ Sharingan o atsukau mono wa sannin ni naru
"If you activate it... Including me, the number of people who can handle the Mangekyo Sharingan will be three" - Itachi to Sasuke (Original Japanese version)
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Itachi's Mangekyo Sharingan
Itachi Uchiha gained the Mangekyo Sharingan by killing his best friend, Shisui Uchiha. With the Mangekyo Sharingan, Itachi is able to use the two most powerful jutsu of the Uchiha clan, Tsukuyomi, a genjutsu of unrivaled power and effectiveness, and Amaterasu, a ninjutsu capable of burning through even the strongest of materials.
Kakashi's Mangekyo Sharingan
Kakashi's Mangekyo Sharingan.Kakashi Hatake developed his own version of the Mangekyo Sharingan, presumably during the timeskip. Unlike Itachi's version, which is used to destroy a target, Kakashi uses his to create a localized interdimensional spacetime warp, allowing him to target any object and send it to another dimension, achieving the same result. Kakashi used this new jutsu to warp a segment of Deidara's right arm into a different dimension. He subsequently uses it again in Chapter 278 to counter Deidara's ultimate move, which would otherwise level the entire forest they were fighting in. The attack requires considerable effort to aim precisely and appears to leave Kakashi's chakra significantly drained; he collapses after using the technique three times (compared to his other original move, Raikiri, which he can use four times a day).
The appearance of the pupil and tomoe in Kakashi's Mangekyo Sharingan differ from that of Itachi's; Kakashi's looks more like a pinwheel. Before this was shown, it was thought that one had to kill their best friend to acquire the Mangekyo Sharingan. Kakashi stated long before developing his Mangekyo Sharingan that everyone close to him was already dead. The only known now-deceased person that could be described as his "closest friend" was Obito, who died shortly after Kakashi received his Sharingan eye. While Kakashi may have felt responsible for Obito's death at the time, he certainly didn't kill Obito himself, and it wouldn't explain why it took him so many years to obtain the Mangekyo Sharingan. Thus, the means behind its development and the actual meaning of the "requirement" are currently unknown.
Shikotsumyaku
The Kaguya Clan's kekkei genkai.Shikotsumyaku (ËÀ¹ÇÃ}, literally "Dead Bone Pulse", according to Databook 2) is the kekkei genkai of the extinct Kaguya clan that gave them the frightening ability to manipulate their own bone structure. They could protrude them out of their bodies, fire them like bullets from their fingertips, or even create a layer of bone under the skin to serve as armor. All this makes their bodies virtually indestructible and gives them a nearly perfect defense, since any point of contact can almostly instantly become as sharp as a spear. However, the ability seems rare among clan members, as Kimimaro Kaguya was the only one seen to possess it out of his entire clan. The Kaguya clan's most powerful techniques utilize this ability in their many sword dances, named after flowers. After they started a war against Kirigakure, they were almost completely wiped out. Kimimaro was the only survivor. He is now deceased, having succumbed to a lethal disease during his battle with Gaara.
Souma no Kou
Sakon and Ukon.Sakon and Ukon of the Sound Four have the ability to unify some or all of one's body with the other's body with Souma no Kou ("Attack of an Evil Spirit Pair"). Typically, Ukon is dormant in Sakon's body, with his head protruding from the back of Sakon's neck. In heated battles, Ukon can lend his arms or legs (literally) to add force to Sakon's physical attacks, and even split completely into two bodies. Ukon can also merge with an opponent's body with Parasite Demon Demolition Technique, gradually killing his new host.
Possible kekkei genkai
Kibaku Nendo
DeidaraDeidara possesses mouths in the palms of his hands, which is probably a bloodline limit or just hijutsu. The mouths can chew up clay and sculpt it into a number of artistic, and usually explosive, forms, thus the name Kibaku Nendo ("Exploding Clay"). Deidara can create clay and make the clay explode by saying "Katsu" (ºÈ).
Satetsu
The Third Kazekage had a special genetic trait that allowed him to turn the chakra he molded into magnetic forces. This ability allowed him to create his Iron Sand, based on the jutsu used by the previous host of Shukaku. This ability was "inherited," and likely made more deadly through the addition of poison, by Sasori in his Kazekage puppet. It is unknown if this was a kekkei genkai, or wholly unique to the Third, similar to the First Hokage's ability to perform Mokuton jutsu.