Sharingan

The is a Kekkei Genkai, which appears in some members of the Uchiha clan of Konohagakure. Some think that it was derived from the Byakugan many years ago. It allows the user to comprehend the attack of an opponent almost before the attacker knows what attack they are making. The Sharingan also allows the user to see the flow of chakra within a person, but to a lesser extent than the Byakugan.

Stages
Character Use: Uchiha Obito, Uchiha Itachi, Uchiha Sasuke, Hatake Kakashi Rank: - Range: - Type: Supplementary

Sharingan is the blood inheritance limit of the Uchiha Clan. The Uchiha are said to be descendants of the Hyuuga, with the Byakugan changing into the Sharingan over time. This doujutsu (eye skill) gives one the ability to read Genjutsu, Taijutsu and Ninjutsu and then defeat it. As such, the clan member can view a technique being performed and almost instantly memorize the movements required to be able to complete it, including the needed chakra moldings and seals used. However the clan member cannot copy techniques that are unique to another bloodline and the clan member must have a body capable of meeting the chakra and physical requirements to do the jutsu. This rarely stops the clan member though, as such stressful situations often push their limits farther and allow them to harness their full potential.

The Uchiha clan member is not granted the Sharingan at birth; it is only activated later in life, typically during a time of emotional stress in the heat of battle. The Sharingan itself can be transferred to another non-Uchiha by a medical ninja, such as happened with Leaf ninja Uchiha Obito to his teammate Hatake Kakashi. Because his body was not born to carry the Sharingan, the eye is always activated and it burns Kakashi's chakra when used. To lessen the impact of the Sharingan on Kakashi's body, he normally keeps the eye hidden and out of use. Also of note, is the fact Kakashi, a non-Uchiha, was able to advance the Sharingan from two tomoe to three tomoe after gaining the eye.

The Sharingan itself contains three tomoe (comma). A higher mastery of the Sharingan can be seen in the creation of a new tomoe in the eye, with three tomoe being the typical highest form of the eye. The rare Mangekyou form is a unique evolution of the Sharingan beyond the three tomoe form, please see its entry for more information. An eye possessing two tomoe can allow the Uchiha clan member to track the movement of an opponent and do some minor copying of an opponents attack. For avoiding incoming attacks, the Uchiha's speed and agility will greatly control whether they can move to avoid it. However, three tomoe will greatly help in this area.

Two tomoe will also allow the ninja to pierce Genjutsu and see the surrounding reality for what it really is. It can also allow the member to pierce another’s body and see their chakra. While the eye is not refined enough to see the tenketsu and chakra circulatory system like the Byakugan, it can view the movement and flow of chakra. This can help them tell if a person is trapped in a Genjutsu, or if an attacker is a real threat or merely a bunshin.

An eye containing three tomoe will allow the ninja to see the image of an attacker’s next move from the slightest muscle tension in their body. This prevents wasteful movement and allows the Uchiha clan member to conserve much needed chakra in battle. It allows them to synchronize their movement to strike at an area moments before their opponent is even in that spot, essentially allowing them to strike out and hit their opponent before they're even there.

Three tomoe also grants the Uchiha the ability to do Genjutsu and hypnosis after locking eyes with an enemy. This can be used to cause their opponent to do an attack of the Uchiha's choosing. This hypnosis can also be used as a Genjutsu counter, which is the ability to turn a Genjutsu spell back upon the original caster without the requirement of forming any handseals.

Origins
It's possibly derived from the Byakugan, though it has a different set of abilities.

Abilities
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 physically nearly as hard as Lee has. In addition to physical skill, the Sharingan cannot allow the user to reproduce other Kekkei Genkai since the Sharingan user doesn't possess the same genetic trait. Additionally, Sharingan users cannot summon a creature which they have not made a contract with.

The Sharingan also grants the user incredible clarity of perception, allowing them to track fast-moving objects with ease and even predict the subsequent movements of those objects. The ability to track and predict movement is largely based on individual skill, as unskilled users have much more trouble tracking fast-moving objects. A fully-evolved Sharingan eye can track all but the quickest opponents, even if the user can't move at the same speed, (so even if the user can follow his or her opponents movements it doesn't necessarily mean their body will be able to react fast enough even though they saw the attack coming). This perception is also great enough to see through Genjutsu, depending upon the skill of the user, and the ability to observe the movement and flow of chakra, but not to the same extent or clarity as the Byakugan. Another ability of the Sharingan is the ability to see chakra as color, even through other objects. For example when Sasuke fights Deidara, he can see Deidara's bombs hidden under ground because of their chakra. Additionally, the Sharingan grants the user exceptional analytical powers, allowing them to instinctively pick up on various visual clues with little difficulty. In one instance, Kakashi had to shut his eyes to avoid accidentally reading Naruto's lip movements while he was spoiling the ending of one of Kakashi's Icha Icha books. Sasuke was also able to reproduce answers on another person's test by watching their pencil movements during the Chunin Exam.

The Sharingan also is capable of a unique brand of hypnosis that involves suggesting actions and thoughts to the opponent through simple eye contact. When used in conjunction with the other aspects of the Sharingan, this allows the user to perfectly mimic every move their opponent makes, even before they do, making it appear as if the user can see the future. More advanced Sharingan users can take the hypnosis ability even further by tricking or even trapping their opponent within an illusion. The potency of the Sharingan's illusion is dependent on the user's knowledge and skill with implementing Genjutsu.

Receiving the Sharingan
Unlike the Byakugan, the Sharingan does not automatically appear from birth in a user; instead, the user has to awaken it. After this first appearance, the user can then call up the Sharingan any time he or she pleases. Due to its unique nature, however, Kakashi's Sharingan cannot be deactivated, 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 numbers 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. He evolved it to three in each eye during his battle with Naruto at the Valley of the End. A fully-matured Sharingan has three tomoe in each eye.

Transplanting the Sharingan
It is possible to transplant Sharingan eyes from one person to another, as occurred with Kakashi and his deceased comrade Obito Uchiha. 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 insignificant. Itachi in particular seems to have no trouble keeping his Sharingan activated near-constantly.

Transplanting the Sharingan eyes from a living or deceased Uchiha is the only way to avoid the loss of sight over time from the Mangekyo Sharingan.

Characters who possess the Sharingan
Characters who currently possess the Sharingan include Sasuke Uchiha, Kakashi Hatake, and Madara Uchiha. 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 a battle against a camouflaging Rock shinobi.


 * Sasuke Uchiha (Unknown new form. Different from all predecessor sharingans)
 * Kakashi Hatake (left-eye only)(Incapacitated)
 * Obito Uchiha (Deceased)
 * Itachi Uchiha (Deceased)
 * Madara Uchiha (Unique Form, upgraded by taking the eyes of his brother)
 * Izuna Uchiha (Deceased)

Mangekyo Sharingan
Character Use: Uchiha Itachi, Uchiha Sasuke, Hatake Kakashi, Uchiha Madara, Uchiha Izuna Rank: - Range: - Type: Supplementary

Sharingan is the blood inheritance limit of the Uchiha Clan. The Mangekyou Sharingan is a legendary doujutsu ability which has only emerged in a few clan members in its history. There is still mystery surrounding the eye and the Uchiha clan itself. Each user develops their own unique looking Mangekyou. The requirements for gaining the Mangekyou are very controversial in nature. After Uchiha Itachi murdered his best friend Shisui he gained Mangekyou. He told his younger brother Sasuke that to gain the Mangekyou, he too would have to kill his closest friend. Itachi told Sasuke that a scroll in their clan shrine revealed the true original purpose of the clan doujutsu. This scroll and Itachi himself revealed that the former leader of their clan, Uchiha Madara and his younger brother Izuna were the first to obtain Mangekyou. Madara himself did this by killing his friend, it's assumed Izuna also killed a close comrade.

Usage of the Mangekyou techniques drains quite a bit of a user’s chakra, more so than any other normal technique. Also as a result of Mangekyou usage, the bearer will slowly lose their vision. Madara lost his vision before his brother and sought to regain his power. To do so he removed Izuna's eyes and made them his own. With these new eyes, his Mangekyou took on a combined appearance of his original Mangekyou and Izuna's. These "Eternal" Mangekyou eyes returned his vision and gave him unbelievable strength. With this strength it was said Madara used Sharingan's normal ability to supress the Kyuubi and tame it.

Itachi originally told Sasuke that if he gained the Mangekyou, then there would be three people who could handle it. After the time skip in the series, Hatake Kakashi revealed he too had gained Mangekyou Sharingan. Later it was revealed that Uchiha Madara himself was still alive, and was the "third" user in Itachi's statement. What part, if any, that Kakashi and Uchiha Obito's eye plays has yet to be determined.

Itachi's three named Mangekyou techniques are Amaterasu, Tsukuyomi and Susanoo, all mythological deities. Kakashi's Mangekyou technique is named Kamui.

The Amaterasu or Goddess of the Sun technique is generated by the right Mangekyou eye. It is a Ninjutsu technique which uses the Mangekyou form to create a powerful black fire which can burn through most anything. As it has been said that anything within the Mangekyou's vision will burn to ash if consumed by the fire. The fire itself is said to burn for 7 days and 7 nights. The fire is also regarded as the strongest of Mangekyou's physical attacks.

The Tsukuyomi or God of the Moon technique is generated by the left Mangekyou eye. It is a Genjutsu technique which uses the Mangekyou form to initiate a mentally and physically harmful illusion. To utilize the illusion, the clan member will look into the eyes of his opponent and cast a Genjutsu spell on them. The spell takes place in the mind of the one affected, while the jutsu is cast the one it was cast upon is at the total mercy of the Uchiha clan member. The clan member has full control over space and time in the jutsu and can place the one affected through any hell they desire for any length desired. The technique itself only lasts for but a second in reality, but the one affected could have lasted through several days of pain. It is said only a natural born member of the Uchiha Clan can defeat it, this may mean either an Uchiha also holding the Mangekyou or one fully skilled in the three tomoe Sharingan form.

The Susanoo or God of the Sea and Storms technique is generated by both Mangekyou eyes. It is a technique which uses the Mangekyou form to create a sword wielding specter which will surround the user. This specter wields a shield for defense and a blade known as the Totsuka Sword. Anyone or anything cut by the blade will be sealed away into a Genjutsu of blissful oblivion until the end of time.

The Kamui or God's Majesty technique is used by Hatake Kakashi. With this technique, Kakashi forms a handseal to activate the Sharingan in his left eye and change it into his Mangekyou form. Kakashi then focuses on a point on the body of his target. The area around the target will then begin to warp and collapse in on itself, resulting in that area being quickly "sucked" out of existence and transported to another location.