|(うちはイズナ, Uchiha Izuna)|
|Anime||Naruto Shippūden Episode #136|
|Movie||The Last: Naruto the Movie|
|Appears in||Anime, Manga, Movie only|
Eighty years prior to the start of the series, Izuna and his older brother Madara were said to be equals as the most gifted members of the Uchiha clan. They usually competed with each other every day in order to get stronger. Both awakened their Sharingan early in life, and they became the first Uchiha to awaken the Mangekyō Sharingan. Madara used the power of his Mangekyō Sharingan to take control of the clan, with Izuna at his side. When Madara eventually went blind, he took Izuna's eyes to regain his sight. Itachi Uchiha suggested that his eyes had been taken by force, however Tobi insisted that Izuna had willingly given up his eyes for the good of his brother and the whole clan, seeing that Madara needed to remain strong to protect the clan from its growing number of enemies. However Madara's love for his brother lends credibility that Izuna willingly allowed Madara to take his eyes. Izuna later died honourably in battle, fighting to the death in his blind state.
Izuna Uchiha was a harmonic and devoted person. He also appeared to be very competitive with his brother, Madara, in terms of skill. Tobi also implies that Madara and Izuna were close as brothers. The First Hokage also informs Sasuke that Madara loved Izuna very much, perhaps even more than Itachi loved Sasuke.
Izuna was a fair-skinned man with long, black hair that had a blue tint to it and was tied in a ponytail. His bangs parted down the centre of his face to frame both sides of it. He wore the standard Uchiha outfit which consisted of a high-collared, blue shirt with the Uchiha Crest on his upper back and blue pants which were wrapped up in bandages at the ends. On his waist, he had a bandage belt that held a sack which presumably held ninja tools.
Izuna was noted to be equal to his elder brother, Madara, in every way. Both of them had exceptionally strong chakra, even for Uchiha members and trained daily to hone their skills.
Izuna mastered his Sharingan at a very young age, alongside Madara. When Izuna awakened the Mangekyō Sharingan, his took the appearance of three bars stretching out of his pupil. When Madara took his eyes, the two Mangekyō combined. Izuna's loss of his eyes rendered him blind, but he managed to survive, and continued to battle. This sudden disability however, ultimately led to his death.
Both Tobirama Senju and Obito Uchiha claimed that Izuna's death played a great role in Madara's antagonism towards the Senju clan that eventually expanded to the world itself. Izuna's eyes continued to be of great importance long after their owner's death, becoming Madara's Eternal Mangekyō Sharingan and later into Rinnegan before being transplanted into Nagato. The eyes were eventually reclaimed by Madara's successor Obito, who used one of the eyes during the Fourth Shinobi World War. The whereabouts of the other are unknown.
- Izuna (飯綱) is the name of a fox spirit in Japan and of a mountain. The latter is usually called Mount Iizuna, though. Iizuna, written with the same kanji, is also the Japanese name for the least weasel. Izuna's name can also be from a mythical god and wind spirit named Izuna that presents himself in the form of a tengu, which may be a reference to Susanoo's perfect form that resembles a tengu.
- Izuna and Obito share the same birthday, and blood type.
- According to the databook(s):
- Izuna's hobby was to train with Madara.