The Uchiha clan before the founding of Konoha.
The Uchiha clan descended from the elder of the two sons of the Sage of the Six Paths.
The elder brother inherited the Sage's "eyes", powerful chakra and
spiritual energies. When it came time for the Sage to choose a
successor, he questioned the two on what course of action they would
follow to bring order to the world. The elder believed that power was the way to bring peace, while the younger believed love
was the way. The Sage favoured the ideal of the younger brother, and
therefore designated the younger as his successor, causing the elder to
be filled with jealousy and hatred.[3] From this hate came what Tobi calls the Curse of Hatred (憎しみの呪い, Nikushimi no Noroi). From the younger son descended the Senju clan who would be the eternal rivals of the Uchiha.[4]
However, the Uchiha suffered another more dangerous curse: a passionate
love that can become a bottomless well of despair the moment the one
they care for most is dead.
Before the founding of the ninja villages, the Uchiha were one of the many mercenary clans for hire. Because of their Sharingan as well as battle prowess, the Uchiha clan came to be known as one of the two strongest clans, the other being the Senju clan. Madara Uchiha was particularly powerful, and, upon attaining the Mangekyō Sharingan,
took control of the clan. Under his leadership the Uchiha grew
stronger, conquering whatever clans they came upon, such that, whenever
the Uchiha clan was hired for a job, the opposing side would hire the
Senju, and vice versa.[5][6]
Konohagakure
The Senju and Uchiha form an alliance.
Some time before Konoha's founding, some members of the Uchiha clan
began to willingly surrender, realising that they were outclassed by the
Senju.[7]
The Senju later grew tired of the endless fighting, and approached the
Uchiha clan with a peace treaty once again. Though rejected time and
time before as Madara feared that an alliance would destroy the Uchiha
clan, he willingly accepted after witnessing Hashirama's resolve[8]. The two clans came together to form Konoha, with Hashirama Senju, leader of the Senju clan, being selected as Hokage.
Madara believed that this was proof that the Uchiha would be made
subservient to the Senju, but his clan saw this only as his attempt to
rekindle the flames of war. They turned their backs on him, and he
defected.[9]
Following Madara's betrayal, having gone into hiding after faking his death in the battle against Hashirama, the Second Hokage Tobirama Senju gave the Uchiha control of the Konoha Military Police Force
as a sign of trust. However, this was really just a way of keeping the
Uchiha's emotions in check so the village would not end up with another
Madara. Over the years, some Uchiha, such as Setsuna Uchiha,
came to realise their ostracism and believed that they were being
purposely kept out of Konoha's governing affairs. Though Setsuna and his
followers tried to rebel against the village as Madara did, they found
that it was too late to make a difference, as the Senju had already
completely suppressed the Uchiha.[10]
Despite Tobirama's attempts, it only caused a greater rift between the
Uchiha and the village. The matter grew worse when a young Obito Uchiha, presumed dead at the time, witnessed the death of Rin and became a follower of Madara's ideals.
Massacre
Main article: Uchiha Clan Massacre The Uchiha clan after the founding of Konoha.
Years later, after the Nine-Tails' Attack on Konoha,
Konoha's elders began to suspect that an Uchiha was behind the attack
because of their ability to control the Nine-Tails with their Sharingan.[11]
Tobi stated that the clan was forced to live in a corner of the
village, ostracised from the rest of the community, and placed under
heavy surveillance.[12] This gave birth to ill-will amongst the clan and the Uchiha interpreted this as confirmation of what Madara had warned them of years earlier, and began to plan overthrowing the village.[13]Itachi disagreed with his father who was the then leader of the clan and militia Fugaku's coup d'état plan, and informed Konoha's leadership of what the Uchiha were up to. Shisui Uchiha,
who had been told to keep an eye on his best friend Itachi also
disagreed with the clan's plan and joined Itachi in his mission to put a
stop to it. He attempted to used the ability of his Mangekyō Sharingan: Kotoamatsukami
to Danzō from committing the genocide, but once again, Danzō —
determined to protect the village the only way he saw possible — stole
Shisui's right eye from him. Saddened that he had failed to stop Danzō,
Shisui met with Itachi and gave him his left eye before the elder came
after it as well, telling him to protect the village and the name of the
Uchiha. The Third Hokage, Hiruzen Sarutobi
who had disagreed with the treatment the Uchiha were receiving, tried
to negotiate for a more peaceful solution, but as time passed and that
strategy seemed to be getting them nowhere, Danzō took matters into his
own hands and inveigled Itachi to commit the genocide with threat of his clan's actions creating another war and innocent children, such as his little brother, becoming a casualty.[14] The end of the Uchiha clan.
Within one night, the entire clan was slaughtered with only one known Uchiha left alive: Itachi's younger brother, Sasuke.
Sasuke would spend the next few years trying to avenge their family by
killing Itachi, something Itachi had planned from the very beginning.
After accomplishing this goal, Sasuke learned of Tobi's existence. Tobi,
who is in fact Obito Uchiha,
another survivor of the clan who was also the one behind the
Nine-Tails' attack, told Sasuke about the Uchiha's history and why
Itachi had wiped out the Uchiha, prompting Sasuke, with Obito's help, to
resolve to destroy Konoha.[15] Sasuke would later be shown the truth by Itachi himself after he was reincarnated.[14]
Survivors
Following the genocide of the clan, there were three survivors: Obito
— then believed to be Madara, Itachi and his younger brother Sasuke
whom the former spared from the killing.
Although before the massacre, Madara survived his battle with
Hashirama, despite what was widely believed, and kept himself alive with
the Demonic Statue of the Outer Path as a life support. He rescued Obito from what appeared to be his death, and would later corroborate with him to carry out his Eye of the Moon Plan.
Ultimately, Itachi died at the hands of his brother — the way he
had intended, and Obito seemingly succumbed to the effects of being
forced to use the Outer Path: Samsara of Heavenly Life Technique to revive Madara; Kakashi Hatake noted that he can no longer sense Obito's consciousness.[16] Madara stabbed Sasuke in the heart, and according to Karin and Tobirama Senju, they could no longer sense his chakra, inferring he died as well.[17]
Abilities
Fire Release: Great Fireball Technique, a signature move of the Uchiha.
The Uchiha were famous for their powerful chakra, exceptionally
strong techniques, and natural aptitude for anything combat-related. The
clan possessed an innate affinity for Fire Releasenature transformation, with even the youngest of members able to use it from just observation.[18] As such they have created several and use this nature transformation more skilfully than any other.[19] Their signature technique was the Fire Release: Great Fireball Technique.[20] Clan members were not recognised as adults by the rest of the clan until they could successfully use this technique.[21] The Uchiha were also highly known for their mastery of ninja tools. They themselves invented many shuriken move sets which required the use of thin metal wires, one example being the Windmill Triple Blades technique. They were apparently also somewhat skilled in barrier ninjutsu, having created the Uchiha Flame Formation which, still holding to their natural affinity for fire, created a barrier that burned whatever came in contact with it.
The Sharingan.
The Uchiha clan were most feared for their powerful Sharingan, a kekkei genkai
which gives them the ability to see the "colours" of chakra, allowing
them to analyse and copy their opponent's skills, along with a number of
other abilities. Only a select few members of the Uchiha clan
manifested the Sharingan. Due to their natural affinity for battle, and
their proficiency with ocular genjutsu, many ninjas considered it more tactically favourable to flee rather than face an Uchiha shinobi in one-on-one combat.[22] Among the techniques granted by the Sharingan, the Izanagi and Izanami are deemed to be forbidden,
due to their effect of rendering the user blind in exchange for
creating genjutsu capable of escaping death or trapping the opponent
without failure. Though the clan was feared for their Sharingan, the
eyes have also been transplanted into various characters outside the
clan.
Madara and Izuna, the first Uchiha to awaken the Mangekyō Sharingan.
Madara and Izuna were the first two Uchiha to awaken an advanced form of the Sharingan known as the Mangekyō Sharingan,
which can be activated by the pain of losing close friends or family
members. However, frequent use of the Mangekyō Sharingan deteriorates
the user's eyesight and results in blindness. Only by taking the eyes of
a sibling can one's vision be restored, a process that results in the
creation of an Eternal Mangekyō Sharingan (永遠の万華鏡写輪眼, Eien no Mangekyō Sharingan).
Itachi indicated that the intricacies of the Mangekyō Sharingan were
only discovered after decades of trial and error, implying that many
Uchiha throughout history had made the attempt to gain the Mangekyō
Sharingan.
One member of the clan, Madara, had managed to awaken the Rinnegan.[23]
After he stole and integrated Senju DNA into his body, he noted that
the dōjutsu did not manifest until he was nearing the end of his natural
lifespan.[24]
Trivia
Uchiha is another way of pronouncing "uchiwa" (団扇, fan),
which is the Uchiha clan symbol. Uchiwa can be used to fan flames,
making the flame hotter — referring to the fact that the Uchiha is a
clan of fire techniques users.
Attire-wise, the Uchiha have always favoured high-collared
outfits with their clan's symbol proudly emblazoned on the back. Over
the generations, their attire has changed with their attire initially
consisting of a dark coloured mantle along with pants, which later
became simple shirts and pants, all the while retaining the high collar.
Itachi, Sasuke, and Obito are the three Uchiha that remained
after the massacre, and all three eventually became affiliated with Akatsuki and like Madara and his brother Izuna, awoke the Mangekyō Sharingan.
In the earlier stages of the series, Kakashi stated that there are rumours the Uchiha clan's Sharingan was derived from the Hyūga clan's Byakugan.[25] However, Kurama is the only one to know the full truth about the Uchiha clan yet appears to have no intention of revealing what it knows.[26]