Sharingan

The Sharingan is a bloodline dōjutsu of the Uchiha clan in the Naruto series. It manifests as a red eye with one to three tomoe and is awakened by intense emotion or life experience. As a hereditary power, it sits at the core of Uchiha ocular abilities and is passed down through generations, with each user presenting their own level of power and style.

Core abilities include enhanced perception and reflexes, the capacity to copy many of the opponent’s jutsu after observing them, and the ability to cast various genjutsu. The Sharingan also allows the user to perceive subtle details in a fight, predict movements, and disrupt an opponent’s chakra flow or balance. The eye’s power is gradual, evolving as the user gains experience and pain, and its effectiveness can vary based on the user’s skill and chakra control.

In its early stage, the eye shows up as one tomoe, progressing to two and then three through emotional and combat development. This tomoe increase marks improved visualization and copying ability. Prolonged use, especially at higher stages, can strain the user’s vision and mental stamina.

Advanced forms arise with Mangekyō Sharingan, awakening through extreme emotional distress. Mangekyō grants unique, powerful techniques that are distinctly tied to the user, such as potent genjutsu or elemental-empowerment abilities, and typically requires a heavy personal sacrifice. Prolonged use can lead to progressive blindness. Eternal Mangekyō Sharingan, achieved by transplanting a close relative’s Mangekyō eye, preserves vision while maintaining enhanced power, though it remains demanding to the body.

Notable users include Itachi and Sasuke Uchiha. The Sharingan remains a defining element of the Uchiha clan and a central pivot in their history within the series.