Sharingan

Biodata

Feature	Value
Name	Sharingan
Original Name	写轮眼
Alias(es)	Copy Eye 212
Classification	Uchiha Clan bloodline limit; ocular technique 5 13
Affiliation	Uchiha Clan; also wielded by outsiders through transplantation 5 125
Primary Functions	Enhanced perception, movement prediction, technique copying, and genjutsu 1 212 229
Advanced Forms	Mangekyō Sharingan and Eternal Mangekyō Sharingan; Itachi subsequently awakens the Rinnegan 2 275
First Appearance	Itachi and Kakashi display Three-Tomoe Sharingan 1

Power Progression

The following records the development of Itachi’s Sharingan, including his earlier awakening as recalled by Orochimaru.

Stage / Realm / Level	Chapter	Notes
One-Tomoe Sharingan	13	According to files recalled by Orochimaru, Itachi awakened this form after his cat died. This occurred before the opening chapter.
Three-Tomoe Sharingan	1	Already proficient at the story’s opening; Itachi observes his surroundings through reflected candlelight and covertly places Kakashi under genjutsu.
Mangekyō Sharingan	2	Unlocked ahead of time as a system beginner reward after Itachi chooses to lead the clan away from Konoha. He is eleven years old.
Ocular power increase	190	A technology-related system reward grants Sharingan ocular power +300 and raises his genjutsu level to LV5.
Upgraded Mangekyō Sharingan / Perfect Susanoo	222 223	An advancement strengthens his ocular power. He summons Perfect Susanoo, also described as complete-body Susanoo, while suffering visual disturbances.
Eternal Mangekyō Sharingan	275	Newly transplanted eyes attain this form. The passage links the transformation to overwhelming grief and transplantation of a close relative’s eyes.
Rinnegan	275	Rippling patterns develop across the Eternal Mangekyō Sharingan before Itachi activates the Rinnegan.

Awakening and Inheritance

• Awakening is not guaranteed: many Uchiha never awaken their Sharingan, despite belonging to the clan 95.
• Emotion influences awakening: Fugaku explains that richer emotions make awakening easier, while the destruction of one’s closest and most beloved person can trigger the Mangekyō Sharingan 228.
• Itachi receives a system-assisted awakening: his Mangekyō is explicitly unlocked early through a beginner reward rather than a newly depicted bereavement 2.
• Earlier trauma also matters: Itachi recalls that the masked man slaughtered his squad and helped awaken his Sharingan; Orochimaru’s files separately mention his cat’s death and the tragic deaths of teammates 6 13.
• Transplantation permits outsider use: Kakashi received Obito’s Sharingan in his left eye and became renowned for copying over a thousand ninjutsu 125.
• Blood relation is associated with the Eternal form: while considering a remedy for his deteriorating vision, Itachi identifies an exchange of eyes between close relatives as the route to the Eternal Mangekyō Sharingan. Sasuke’s unawakened eyes make that option unavailable at the time 170.

Appearance

• Three-Tomoe form: crimson eyes containing three rotating tomoe 1.
• Mangekyō transformation: the tomoe twist or connect into a changed pattern when advanced ocular power activates 130 180 248.
• Late transformation: Itachi’s newly transplanted eye patterns nearly cover the whites of his eyes; ripples subsequently spread across them as the Rinnegan develops 275.

Abilities & Skills

Enhanced Perception and Prediction

The Sharingan reveals fine visual details, chakra movement, and attack trajectories 74 212 229.

• Itachi surveys movements around him through the refraction of candlelight 1.
• At full output, his vision captures the dark surroundings of Ryūchi Cave like a high-speed camera recording individual frames 74.
• Reading an opponent’s chakra circulation helps anticipate the direction and range of attacks 212.
• Fugaku can predict actions over the next few seconds, although unfamiliar weapon trajectories strain his concentration 229.
• Kakashi tracks every crow in Itachi’s Crow Barrage and strikes them with lightning needles 250.

Technique Copying

The eye’s copying function relies on observing how an opponent’s chakra circulates 212.

• Kakashi uses rapid imitation alongside brief genjutsu to make opponents believe their techniques have been completely understood, disrupting their confidence 212.
• His copied repertoire exceeds one thousand ninjutsu 125.
• Itachi imitates Danzō’s wind-based techniques when developing Myriad Crow Escape, despite not fully controlling wind-nature chakra 129.

Genjutsu and Mental Control

Sharingan genjutsu can interfere with consciousness, immobilize opponents, and impose psychological suggestions 1 13 252.

• Covert control: Itachi exploits Kakashi’s emotional reaction to the Battle of Kannabi Bridge and infiltrates his subconscious without Hiruzen noticing 1.
• Restraint: he traps Orochimaru in genjutsu and uses the encounter to negotiate 13.
• Intimidation: an illusion shows Hidan and Kakuzu an unavoidable defeat, prompting them to withdraw 125.
• Interrogation: Itachi probes Swamp Yuming’s soul to uncover the Land of Swamps’ scheme 169.
• Cooperative casting: the Uchiha trio combines its ocular power into group genjutsu that overwhelms weaker opponents 145 150.
• Supportive hypnosis: Yamakawa puts the injured Duanjian to sleep so that movement will not aggravate his wounds 151.
• Indirect delivery: Itachi implants genjutsu through crow eyes, while Fugaku uses reflected surfaces to attack from multiple angles 48 230.

Tsukuyomi

Itachi’s left Mangekyō Sharingan draws an enemy’s mind into an illusionary realm where he controls time, place, and matter 252.

• Seeing his eyes can be enough to trigger the technique 252.
• The victim can suffer extreme physical and mental torment within the illusion without initially recognizing it as genjutsu 252.
• Kakashi experiences torture by numerous Itachi figures and collapses after being caught 252.
• The masked observer wishes those eyes could cast Infinite Tsukuyomi directly; the detailed passage does not establish that Itachi actually performs it 252.

Amaterasu

Amaterasu produces black flames through Mangekyō ocular power 130.

• Itachi uses it against the Sound ninja during Orochimaru’s attempt to capture him 24.
• The flames cling to Konan’s wings and spread despite her attempts to extinguish them by rapid vibration 130.
• They are described as inextinguishable and capable of burning whatever they touch to ashes 182.
• Their effect is not absolute: against the Zero-Tails, they scorch the outer skin before drifting away, appearing to have been tamed 182.

Susanoo

Susanoo is described as the third power unlocked by the Mangekyō Sharingan. It materializes immense chakra into a humanoid form around the user 12.

• Its skeletal structure protects Itachi’s Anbu teammates from destructive attacks 12.
• It renders most attacks ineffective, but excessive use consumes the user’s life force 12.
• Itachi’s crimson Susanoo catches Red’s lightning-empowered axe attack with one hand before counterattacking with the Sword of Totsuka 180.
• The complete form can level a mountain with a single strike 225.

Kotoamatsukami

Shisui possesses Kotoamatsukami, described as the genjutsu with the strongest single-target power 219.

• Lina Madina proposes using it against Might Guy when ordinary genjutsu proves ineffective 219.
• Shisui hesitates because its use could produce unexpected results 219.

Kamui

Kakashi’s Mangekyō Sharingan grants Kamui, a spatial technique that changes the world through ocular power 248.

• It subjects Lina Madina to spatial capture and twisting pressure 248.
• Unlike a physical enclosure that can be broken, the attack is described as operating through a higher level of spatial laws 248.

Izanagi

Izanagi converts unfavorable events—including the caster’s death—into dreams while making favorable events real for a brief period 222.

• Shisui reverses his near-death condition during his battle with Might Guy 222.
• The casting eye becomes permanently blind 222.
• Itachi later uses Izanagi and loses sight in one eye, substantially reducing his combat performance 251.

Sharingan-Bearing Crows and Spirits

Itachi can extend ocular power through manifestations beyond his own eyes 48 92 116.

• Crow Swarm delivers genjutsu through the crows’ eyes 48.
• His snake spirit manifests a Sharingan that terrifies Garaga 92.
• He supplies Izumi, Duanjian, and Yamakawa with Sharingan-powered crows that enter their bodies to assist their examination mission and monitoring 116.

Limitations and Costs

Physical Deterioration

• Activating Susanoo leaves Itachi feeling as though his skeleton is falling apart. Shisui explains that ocular activation overtaxes the body 14.
• Long-term overexertion and premature Sharingan development cause bodily deterioration, blurred vision, and diminished visual sharpness 170.
• Repeated use can deplete ocular power and gradually cause blindness before the Eternal Mangekyō Sharingan is obtained 170.
• Itachi experiences threatening, curse-like voices during his deterioration episode 170.
• Shisui suggests that the legendary Eternal Mangekyō Sharingan may withstand the advanced eye’s side effects 14.

System Reading During Itachi’s Deterioration	Value
Health	78 170
Essence	56 170
Eye Power Overdraft	27% 170
Happiness	61; red-line warning 170
Depression	356 170
Lifespan	Unknown 170

Combat Counters

• Extreme speed: Might Guy moves before Itachi can activate his Sharingan; Shisui later observes that Guy’s speed can evade its genjutsu 211 214.
• Unreadable chakra cues: Guy’s tightly controlled taijutsu shows no visible chakra leakage, preventing advance prediction through chakra trajectories 212.
• Puppets: Sharingan genjutsu cannot affect Sasori’s puppets 109 233.
• Tailed-beast assistance: the Eight-Tails helps Killer B break free of Fugaku’s genjutsu and remain conscious 228.
• Complex weapon handling: Killer B’s unusual blade trajectories make even Fugaku dizzy and demand greater concentration 229.
• Loss of an eye: after Izanagi, Itachi struggles to track rapid movements with only one Sharingan 251.

Notable Wielders

Wielder	Documented Form or Use
Itachi Uchiha	Advances from Three-Tomoe to Mangekyō, Eternal Mangekyō, and Rinnegan; uses Amaterasu, Tsukuyomi, Susanoo, and Izanagi 1 2 130 251 252 275.
Shisui Uchiha	Uses Kotoamatsukami and Izanagi; the latter permanently blinds one eye 219 222.
Fugaku Uchiha	Mangekyō wielder whose mass genjutsu earns him the reputation of “Wicked Eye Fugaku” 228.
Kakashi Hatake	Uses Obito’s transplanted left eye; displays Three-Tomoe and Mangekyō forms, technique copying, and Kamui 1 125 248.
Obito Uchiha	The tiger-masked Mangekyō wielder who initially introduces himself as Madara Uchiha 6 196.
Izumi Uchiha	Awakens a One-Tomoe Sharingan and receives a scroll containing Itachi’s insights 6.
Yamakawa Uchiha	Participates in cooperative genjutsu and hypnotizes an injured teammate 150 151.
Duanjian Uchiha	Participates in cooperative genjutsu; later connects his three tomoe during an intense mental attack 150 264.

Story Role

Clan Heritage and Training

The Uchiha treat their Sharingan as a protected bloodline limit and refuse to allow outsiders to obtain it casually. Itachi’s decision to share his insights with Izumi represents significant trust, since ninja normally guard knowledge that could expose their abilities 5 6.

The eye also shapes the clan’s training priorities. Uchiha who awaken it generally develop combat methods suited to their particular ocular abilities, although awakening remains inaccessible to many clansmen 95 270.

Eye Theft and Persecution

Reports of fleeing Uchiha having their eyes gouged out turn a former source of clan pride into a source of fear. Danzō, Orochimaru, and Cedar Ghosthead all express an interest in acquiring Sharingan, while Watanabe Hiroyuki cites Kakashi’s transplantation as a precedent when coveting Izumi’s eyes 2 13 43 67 135.

The Allied Shinobi Forces treat captured eyes as war assets. Ōnoki describes preserving them in nutrient fluid with records of their owners and accomplishments; other factions forcibly exploit captured Uchiha for descendants who can supply more eyes 274.

Itachi’s Final Ocular Transformation

After Shisui is gravely wounded, Itachi appears with newly transplanted eyes. Grief and transplantation produce the Eternal Mangekyō Sharingan, followed by the Rinnegan. His ensuing power overwhelms Ōnoki and the Six Paths of Pain during the assault on the Uchiha 274 275.