Sharingan

Biodata

Feature	Value
Name	Sharingan (写轮眼)
Classification	Hereditary ocular ability associated with the Uchiha Clan; one of the Three Great Dōjutsu alongside the Byakugan and Rinnegan 1 218.
Affiliation	Uchiha Clan 20 41.
Occupation/Role	Supports visual analysis, technique copying, genjutsu, and advanced ocular techniques 17 20 123.
Known Users	Sasuke Uchiha/Zheng Yuheng, Itachi Uchiha, Kakashi Hatake, Obito Uchiha, Madara Uchiha, Shisui Uchiha, Danzo, and Nagato; Itachi also places one of Shisui’s eyes in a summoned crow 19 109 224 233 274 279.
Status	Remains with Zheng Yuheng as a One-Tomoe Sharingan after his final reincarnation 341.
First Appearance	Zheng discovers an active One-Tomoe Sharingan after awakening in Sasuke’s body 1.

Power Progression

The documented stages below distinguish Sasuke’s gradual cultivation from Itachi’s retraining. Sasuke’s initial prediction of an automatic Mangekyo awakening after nine tomoe proves incomplete 2 171 335.

Stage / Realm / Level	Chapter	Notes
Sasuke — One-Tomoe Sharingan	1	Already active when Zheng awakens in Sasuke’s body. He attributes the awakening to increased spiritual power from their fusion.
Sasuke — Three-Tomoe Sharingan	17	Proficient in copying and dynamic observation after keeping his eyes activated regularly. The intervening Two-Tomoe advancement is not documented in the supplied passages.
Sasuke — Four-Tomoe Sharingan	28	Confirmed during the Chunin Exams. Unlocks Tsukuyomi, initially limited to twelve hours of subjective time.
Sasuke — Five-Tomoe Sharingan	65 66	Gradual chakra input reveals Kamui, giving access to both destructive spatial attacks and concealment/intangibility.
Itachi — Four-Tomoe Sharingan	98	Awakens after a year of solitary foundational training following Sasuke’s advice. His first unlocked ability is Amaterasu, rather than Sasuke’s Tsukuyomi.
Sasuke — Six-Tomoe Sharingan	123	Awakens after two further weeks of rigorous training and improved Cell Activation practice. Unlocks Amaterasu together with flame manipulation.
Sasuke — Seven-Tomoe Sharingan	140	Awakens during six months of training around the Three-Tails. Unlocks Kotoamatsukami; three black rings are present, but Rinnegan abilities remain absent.
Sasuke — Eight-Tomoe Sharingan	Retrospectively described 266	Grants the separate chakra spaces he names Nine-Cycle Space, used to cultivate all nine chakra natures.
Sasuke — Nine-Tomoe Sharingan, incomplete	Confirmed 171	Neither the expected Mangekyo nor Rinnegan abilities appears. His eyes subsequently absorb chakra to compensate for deficiencies associated with six newly cultivated natures 186 199.
Itachi — Seven-Tomoe Sharingan	Confirmed 265	Possesses four ocular abilities, some with paired applications. His eyes no longer risk blindness, although further advancement has become difficult.
Sasuke — Sumeru manifestation	271	Natural-energy absorption and strengthening with collected Sharingan cause Nine-Cycle Space to merge into Sumeru, a world he can materialize and modify.
Sasuke — Stabilized Nine-Tomoe hybrid, still incomplete	272	Further absorption unlocks Instant Air, Nagato’s seven Rinnegan abilities, and Madara’s Limbo. Susanoo remains absent even after he absorbs the remaining stored Sharingan.
Sasuke — True Mangekyo Sharingan	335	After confronting his subconscious rejection of the world, he channels chakra and natural energy into his eyes. Nine tomoe become nine layered petals, unlocking Susanoo and the Lotus of Purification.

Background / History

Zheng begins studying the Sharingan immediately after his transmigration. He proposes that awakening depends on sufficient spiritual power rather than trauma itself: extreme mental pressure can force an awakening, but sustained training should achieve it without the same harmful shortcuts. His planned method combines physical conditioning, willpower development, and gradual adaptation of the eyes to chakra 1 2.

Sasuke’s Four-Tomoe awakening provides his first practical evidence for advancement beyond the familiar Three-Tomoe stage. During his reunion with Itachi, he moves freely inside Itachi’s Tsukuyomi and urges his brother to stop using his deteriorating Mangekyo. Itachi follows that advice, rebuilds his neglected ninja fundamentals, and eventually awakens Four-Tomoe eyes of his own 28 37 98 100.

The Nine-Tomoe stage exposes gaps in Sasuke’s original theory. His eyes remain incomplete despite his chakra-nature training, and strengthening them with stored Sharingan produces Rinnegan powers without Susanoo. The missing breakthrough comes only after the Sage of Six Paths’ Nine Revolutions Reincarnation Technique helps him confront his rejection of the world 171 272 298 335.

After living to age 150 and undergoing another reincarnation, Zheng discovers that he still possesses a One-Tomoe Sharingan in his apparently ordinary human life 341.

Appearance

• Early tomoe pattern: Three tomoe form a circle around the pupil; the fourth begins a second, outer circle 54.
• Seven-Tomoe pattern: Three black rings are visible, although this appearance does not initially grant Rinnegan powers 140.
• True Mangekyo pattern: Nine petals replace the nine tomoe. Three petals occupy each of three distinct, three-dimensional layers, which can rotate 335.
• Concealment: Sasuke and Itachi wear sunglasses to hide their unusual eyes and their advancement beyond Three-Tomoe 71 98 259.

Awakening and Cultivation

Spiritual and Physical Development

Sasuke’s method treats the Sharingan as a hereditary ability that must develop alongside its user’s body and spiritual strength 1 2.

• Spiritual training: Persistent effort and willpower replace deliberate reliance on bereavement or life-threatening stimulation 1 37.
• Physical training: Weight training, taijutsu, and Cell Activation strengthen the body and increase the chakra available to support the eyes 92 123.
• Ocular conditioning: Sasuke keeps the Sharingan active until discomfort requires rest, gradually reaching all-day activation without pain 37.
• Incremental chakra input: He tests new stages by increasing chakra gradually rather than overwhelming the fragile structures around his eyes 65.
• Individual variation: Itachi unlocks Amaterasu at Four-Tomoe, whereas Sasuke unlocks Tsukuyomi. The brothers do not establish whether this difference is innate or influenced by Itachi’s earlier Mangekyo awakening 98 109.

Activation and Stage Control

Chakra supply determines whether Sasuke’s Sharingan remains active and which developed stage he displays 1 41.

• Cutting off the supply deactivates the Sharingan 1.
• Reducing chakra output changes his Four-Tomoe eyes to Three-Tomoe, allowing him to conceal his actual advancement 41.
• Sustained chakra absorption by his incomplete Nine-Tomoe eyes causes unpredictable fluctuations in combat strength 264 265.

Conventional Mangekyo and Transplants

Sasuke calls the trauma-driven jump from Three-Tomoe to Mangekyo a “Pseudo-Mangekyo.” He argues that the eyes acquire power before their nerves, blood vessels, and meridians can withstand it 37 123.

• He attributes bleeding and eventual blindness to inadequate ocular conditioning and excessive chakra impact 2 123.
• His original theory predicts that gradual advancement through nine tomoe will naturally produce an eternal Mangekyo; his later difficulties show that this prediction was incomplete 2 171 272.
• He believes transplanted eyes cannot progress to Four-Tomoe in non-Uchiha recipients, citing Kakashi as an example 123.
• He also identifies accumulated pupil power as a limitation for Danzo and the Sharingan implanted in Itachi’s crow 123.
• Itachi’s retrained Seven-Tomoe eyes are explicitly stated to be free of the former risk of blindness 265.

Abilities & Skills

Visual Analysis and Copying

The Sharingan reads movements and techniques, allowing its user to reproduce observed ninjutsu and taijutsu 17 20 199.

• Kakashi’s reputation as the Copy Ninja comes from copying over a thousand techniques 20.
• Sasuke uses a swordsmanship competition as an opportunity to copy techniques and study their practical use 54.
• Itachi copies Sasuke’s strongest taijutsu during their sparring, but cannot immediately apply it under pressure 111.
• Seeing an attack does not guarantee that the body can react quickly enough 17 290.
• Copying does not replace practice; Sasuke still needs training to turn observed material into usable skills 66.

Tsukuyomi

Sasuke unlocks this mental-space genjutsu at Four-Tomoe. Its time compression improves as his eyes develop 28 75.

• Initially lasts for twelve hours of subjective time, with Sasuke expecting relatively limited damage to an opponent’s spiritual strength 28.
• Later reaches a ratio of one external second to twenty-four hours inside the illusion 75.
• Sasuke activates his Four-Tomoe eyes inside Itachi’s Tsukuyomi and frees himself from its restraint without leaving the mental space 37.
• Against Ten-Tails jinchūriki Madara, Sasuke judges Tsukuyomi effectively unusable 290.

Kamui

Unlocked at Five-Tomoe, Sasuke’s Kamui combines spatial destruction with concealment and intangibility 66 67.

• Kamui: Rupture / Break: Attacks a visible target without the precise aiming Sasuke associates with Kakashi’s version 67.
• Kamui: Concealment / Hide: Enables close-range spatial movement without a spatial mark, intangibility, and entry into his own space 67 75.
• Early limits: Range is short, and disappearing into his space is initially limited to three minutes 75.
• Combat applications: Sasuke phases through a massive explosion, bypasses Ringo Ameyuri’s defenses, and evades Kaguya’s chakra fists 166 260 294.

Amaterasu

At Six-Tomoe, Sasuke gains black flames and their manipulation as an integrated ability rather than separate, restricted powers 123.

• Amaterasu: Burn: Produces offensive black flames 123.
• Amaterasu: Act: Controls and manipulates those flames 123.
• Limits: Its reputation for burning until a target is consumed is not absolute; an opponent’s power can prevent a decisive result 123.
• Countermeasures: Madara sheds the flames, while the Divine Tree removes burning sections of itself 287 290.
• Advanced applications: Sasuke combines Amaterasu with senjutsu attacks and uses it to escape Kaguya’s ice 287 291 294.

Kotoamatsukami and Tailed-Beast Control

Sasuke unlocks Kotoamatsukami at Seven-Tomoe. Although described as the strongest genjutsu, he questions that label because his progression still has two tomoe remaining 140.

• Sasuke considers Kotoamatsukami ineffective against Ten-Tails jinchūriki Madara 290.
• Separately, he identifies control of Tailed Beasts as a major Sharingan capability and cites Madara’s historical use of it 233.

Nine-Cycle Space, Sumeru, and Instant Air

The Eight-Tomoe ability provides separate chakra spaces; their later merger produces Sumeru 266 271.

• Nine-Cycle Space: Allows Sasuke to cultivate all nine chakra natures 265 266.
• Sumeru: A real yet illusory world that Sasuke can materialize and modify 271.
• Instant Air: Permits immediate movement anywhere within Sumeru’s materialized range, without Flying Thunder God-style coordinates 272 319.
• Transport and protection: Sasuke shelters the resurrected Hokage and Itachi’s squad in the Kamui dimension, then later unfolds Sumeru around the entire Allied Shinobi Forces 273 335.
• Against Kaguya: Instant Air enables rapid repositioning, but her Byakugan detects his approach and allows her to evade 294.

Rinnegan Abilities

Strengthening his Nine-Tomoe eyes with natural energy and collected Sharingan grants Sasuke Rinnegan powers before his true Mangekyo awakening 272.

• Gains the seven abilities associated with Nagato and Limbo, bringing the stated total to eight 272.
• Uses Shinra Tensei to repel Madara’s Susanoo and contribute to the Senjutsu: Wind Fire Wheel 279 287.
• Creates four Limbo shadows to engage Madara’s four shadows 290.
• These powers do not initially resolve his eyes’ incompleteness: Susanoo remains absent 272.

Susanoo

Sasuke’s true Mangekyo finally manifests the construct missing from his Nine-Tomoe stage 272 335.

• Takes the form of an immense crimson, armored tengu with wings 335.
• Carries a bow, twin blades, and gauntlets 335.
• Houses Sasuke inside a pentagonal crystal on its forehead 335.

Lotus of Purification

A new ability appearing with Sasuke’s true Mangekyo, formed from immense quantities of chakra and natural energy 335.

• Provides tremendous protection; all nine Tailed Beasts stand on its petals during Sasuke’s confrontation with the Allied Forces 335.
• Later kills Momoshiki by attacking his soul, bypassing chakra absorption 341.

Transplantation and Collected Eyes

• Kakashi’s Sharingan: A transplanted eye originally belonging to Obito; its Kamui application emphasizes spatially severing and drawing targets into another dimension 66.
• Shisui’s eyes: Danzo seizes the right eye, while Shisui gives the left to Itachi. Itachi implants his eye in a summoned crow 109 233.
• Danzo’s arm: Covered with Sharingan; Sasuke presents it as evidence of persecution against the Uchiha 226.
• Nagato’s replacement eyes: Sasuke removes Nagato’s burdensome Rinnegan and later transplants a pair of activated Three-Tomoe Sharingan 218 224.
• Obito’s stockpile: A basement at his main base contains numerous preserved Sharingan. Sasuke absorbs the stored eyes to strengthen his own during accelerated advancement 270 271 272.

Story Significance

• A coveted bloodline: The demand for Uchiha eyes makes Sasuke’s solitary travel dangerous and helps motivate Orochimaru’s fixation on his body 69 100.
• A concealed advantage: Sasuke initially keeps higher-tomoe development secret, particularly to prevent Obito from discovering and adopting the same training method 71.
• An altered inheritance: Black Zetsu’s falsification of the Uchiha stone tablet manipulates generations of the clan into following a false plan 289.
• A source of suspicion: The brothers’ shared use of Kamui and Amaterasu during the war exposes capabilities Kakashi cannot reconcile with their previously known eyes 259.
• A public demonstration of power: Sasuke’s true Mangekyo, Susanoo, Sumeru, and Lotus of Purification underpin his confrontation with the Five Kage over forced world unification 335.

Notable Quotes

“The Sharingan also needs training. The meridians around the eyes are very fragile and require practice from the very beginning.” — Sasuke to Itachi 37

“Whether I’ve surpassed her or not, I’m not sure. But I know they still have potential to be unlocked. I haven’t reached my limit, and I will continue to walk this path.” — Sasuke, discussing Kaguya’s eyes 295