Sharingan

Biodata

Feature	Value
Name	Sharingan (写轮眼)
Alias(es)	Blood Wheel Eye
Species/Race	Uchiha Clan ocular bloodline limit
Affiliation	Uchiha Clan
Status	Active; wielded by Uchiha Xin
First Appearance	Uchiha Xin's single-tomoe Sharingan manifests after his soul merges with the original body 3

Power Progression

Stage / Realm / Level	Chapter	Notes
One-tomoe Sharingan	3	Xin awakens a single-tomoe Sharingan after merging with the original body and begins training to develop its potential. 3
Two-tomoe Sharingan	43	Xin's fully liquefied chakra nourishes his ocular power, advancing the Sharingan and greatly improving his perception, combat insight, and genjutsu. 43
Three-tomoe Sharingan	65	Xin evolves it through repeated self-inflicted Endless Reincarnation genjutsu, enduring intense mental pressure and breaking the illusion through willpower. 65

History

The Sharingan is the Uchiha Clan's defining bloodline limit and a central source of its battlefield advantage. Clan mentors teach that its stages progress through one, two, and three tomoe, but stress that its power requires sufficient strength and wisdom to control safely. 14

Xin's Sharingan initially awakens at the one-tomoe stage following his transmigration. He treats it as his principal weapon, activating it during training to better read opponents' movements and intentions. 3

After refining his chakra to a fully liquefied state, Xin reaches the two-tomoe stage. Seeking a further breakthrough, he studies ocular techniques, consults clan elders, confronts powerful opponents, and ultimately uses his own genjutsu to generate the emotional and mental pressure needed to reach three tomoe. 43 64 65

Appearance

The Sharingan is an ocular ability whose documented stages are distinguished by tomoe. Xin's three-tomoe activation is described as emitting a dazzling red light. 107

• One tomoe — Xin's initial awakened state. 3
• Two tomoe — Xin's form after his chakra refinement. 43
• Three tomoe — Xin's advanced form after surviving Endless Reincarnation. 65
• Mangekyō Sharingan — A higher, unawakened form described as the Sharingan's most mysterious ocular technique. 66 97

Abilities & Skills

Dynamic Vision and Combat Insight

The Sharingan enables its user to read subtle movements, intentions, and weaknesses, supporting both evasive action and precise counterattacks.

• Tracks enemy movements and anticipates incoming attacks. 3 51
• Allows Xin to identify weaknesses and formulate combat responses rapidly at the two-tomoe stage. 43
• Perceives opponents' movements and intentions during multi-opponent engagements. 71 118
• Helps Xin find openings in enemy formations and coordinate attacks with allies. 74

Chakra and Technique Perception

Advanced use allows Xin to perceive chakra-related details and examine hidden threats.

• Xin can perceive chakra flowing through the air after attaining two tomoe. 43
• The Sharingan can perceive an opponent's movements and intentions, see through some genjutsu, and expose the truth behind ninja tools. 57
• Its perception is not absolute: Xin cannot penetrate the nature of a mysterious dark power encountered in a forest fissure. 51

Copying Ability

Xin identifies copying as one of the Sharingan's deeper applications.

• Can copy other users' ninjutsu and taijutsu. 57
• Three-tomoe development is associated with the ability to observe hand seals and copy or reflect ninjutsu and genjutsu. 64

Genjutsu

The Sharingan serves as Xin's foundation for genjutsu, allowing him to exploit observed weaknesses and draw targets into illusions.

• Manipulates an opponent's senses and thoughts to create illusory worlds. 36
• The two-tomoe stage grants Xin a powerful illusion technique capable of trapping enemies in illusory realms. 43
• Xin uses Sharingan-assisted genjutsu to disorient enemy forces, observe their reactions, and disable their ability to fight. 77
• The effectiveness of genjutsu depends on the mental-strength gap between caster and target; strong-willed or specially equipped enemies may resist or break it. 36
• Using the Sharingan places a heavy burden on the user's mind and body. 43

High-Speed Ninjutsu Integration

The Sharingan's dynamic vision makes it particularly compatible with Xin's high-speed Lightning Release techniques.

• Supports precise Chidori attacks by allowing Xin to track opponents while moving at high speed. 30 31
• Enhances Xin's Rasengan control by helping him observe openings and adjust its direction and force. 67
• Forms part of Sharingan: Lightning Shadow Rasengan, which combines ocular insight with a rapid Rasengan strike. 68

Evolution and Limitations

• Sharingan evolution is linked to intense emotional turmoil, including grief, rage, betrayal, longing, or other profound inner conflict. 64 83
• Continued growth in ninjutsu, taijutsu, intelligence, and overall strength is presented as necessary groundwork for higher ocular techniques. 64
• Medicines, secret arts, and instruction from more advanced users may accelerate development, though these methods carry risks. 64
• The Mangekyō Sharingan requires extraordinarily severe emotional stimulation and is associated with immense power, but its use can progressively damage the user's eyesight. 66 97
• Xin refuses to follow the method attributed to Itachi Uchiha—killing a close friend to provoke awakening—and instead searches for a safer path. 97
• Xin recognizes that overreliance on the Sharingan can cause him to neglect taijutsu, ninjutsu, and tactical judgment. 59

Related Technique: Black Eye

The Black Eye is a cultivated ocular method created by Xin for Uchiha clansmen who have not awakened the Sharingan.

• It develops the naturally strong vision of unawakened Uchiha students through specialized observation and perception training. 92 93
• More than half of Xin's students awaken the Blood Wheel Eye through his instruction; those who do not can still cultivate the Black Eye. 93
• Users can develop long-range vision, dynamic vision, and copying ability, but generally cannot cast or discern genjutsu. 93 96
• Its documented ceiling is comparable to the two-tomoe stage because of insufficient Uchiha bloodline concentration. 96
• Its core limitation is inadequate mastery of the Uchiha Clan's unique spiritual energy, which is necessary for genjutsu. 96