Itachi Uchiha

was an ANBU from Konohagakure's famed Uchiha clan before his defection, becoming an S-rank missing-nin and a prominent Akatsuki member who was partnered with Kisame Hoshigaki.

Background
Itachi was born into the Uchiha clan as the eldest son of Mikoto and Fugaku and was praised by all as the best of his generation, a genius above all others. Even by the standards of the battle-adept Uchiha clan, Itachi's prowess far outshone their own. However, few could understand him. When he was only four, Itachi had already witnessed countless lives lost due to the Third Shinobi World War, which emotionally traumatised him and turned him into a pacifist.

During the Nine-Tails' attack on Konoha, Itachi was left alone to take care of his infant brother Sasuke and promised to protect him no matter what. In the anime, it was shown that during their childhood, Itachi made a game of collecting paw prints of cats with his brother. The last paw print to be collected was Nekomata's, who Itachi had defeated and asked him to fight Sasuke with all his might when Sasuke got older.

At age 7, Itachi graduated from the Academy at the top of his class after only one year, mastered the Sharingan at age 8, passed the Chūnin Exams at age 10, enrolled in ANBU half a year later and became captain by 13. At some point in time in their childhood, Sasuke helped Itachi on one of his missions to capture a giant boar. Itachi told Sasuke to avoid his vital points. He then threw kunai with explosive tags around the boar, to confuse it and to give Sasuke an opportunity to shoot the boar. Sasuke, however, missed completely. After Sasuke apologised, Itachi told him he needs to train more.

Itachi was praised highly by his father, who saw the family's future in Itachi and hence inadvertently neglected his younger son. However, during this time Itachi showed great affection towards his little brother and even encouraged his father to come to the Academy enrolment ceremony for Sasuke, something their father had otherwise forgotten, caught up an important mission that would establish Itachi a place in the ANBU ranks.

When the Uchiha clan began planning to overthrow Konoha, Itachi, as an ANBU, was tasked with spying on the village. Knowing that a coup d'état would only lead to another Ninja War, Itachi began spying on the Uchiha instead, passing on information to the Third Hokage and Konoha elders. During this time he began to act strangely, not attending the clan meetings, speaking out against the clan, and becoming the prime suspect for the murder of his best friend Shisui Uchiha, who was drowned in the Naka River. In reality, Shisui died after entrusted his remaining Mangekyō Sharingan to Itachi, the other having been taken by Danzō. Due to this the clan lost hope in Itachi, and his father began shifting his focus to Sasuke instead. Meanwhile, the Third's attempts to negotiate a bloodless end to hostilities between the two parties were proving ineffective so, against Hiruzen's wishes, Danzō Shimura and the Konoha Council ordered Itachi to wipe out the Uchiha clan.

Before the fateful night arrived, Itachi discovered the existence of Tobi — under the guise of a vengeful Madara Uchiha — who was attempting to rekindle the flames of war in Konoha. In return for not attacking Konoha, Itachi offered to help him claim vengeance against the Uchiha for turning their backs on him decades earlier; Tobi agreed. Itachi slaughtered his entire clan overnight, including his friends, superiors, family, and lover. However, he spared Sasuke, because he could not follow through with the orders to kill his little brother. Instead, he made himself out as a villain, who had killed their innocent family only to test his capacity, and told Sasuke he was not even worth killing. In addition, Itachi told him, "You've always wanted to surpass me. That's why I'm going to let you live… if you wish to kill me, then hate me, despise me… and by all means flee, cling to your wretched life". Itachi also revealed to Sasuke the secret meeting place of the Uchiha, where Sasuke can learn the true history and purpose of the Sharingan. Itachi told him that in order to awaken the Mangekyō Sharingan, Sasuke had to kill the person closest to him, and that when they met again, they should have the same eyes.

Sasuke managed to stand back up, awaken his Sharingan, and pursue Itachi. Upon reaching Itachi, he managed to knock off his forehead protector. Itachi shed a tear as he was picking up his forehead protector, then proceeded to incapacitate Sasuke, who awoke in the hospital, only remembering up to Itachi's speech. By doing all this, Itachi hoped Sasuke would take vengeance on him and become a hero to Konoha, thus redeeming the Uchiha name. Hoping that his little brother would someday be powerful enough to kill him, Itachi left the village as a traitor. Knowing that Konoha would still want to eliminate Sasuke, Itachi pleaded with the Third Hokage to keep Sasuke safe. He also threatened Danzō to not harm Sasuke or he would reveal everything he knew about Konoha's secrets to enemy nations.

Itachi joined Akatsuki in order to keep an eye on the organisation, along with Tobi, in case either ever acted against Konoha, all the while planning for his death at Sasuke's hands. During his time in Akatsuki, Orochimaru tried to steal his body to gain the Sharingan, but Itachi trapped him in a genjutsu and severed his left hand. Itachi was further partnered with Kisame Hoshigaki, who initially tried to intimidate him. However, they eventually became good partners. Sometime after Orochimaru fled, Itachi helped recruit Deidara by beating him in battle using only genjutsu, to which Deidara swore vengeance.

At some point in time, Itachi contracted a fatal illness. He kept himself alive through the intake of various medicines and sheer "willpower", in the hopes of living long enough to die by Sasuke's hands.

Personality
Ever since his first appearance, Itachi had always been inscrutable. Flashbacks showed that he used to be a compassionate brother, but his initial appearances depicted him as an Akatsuki criminal only interested in the organisation's success and secrecy before all else. Later his interested in Akatsuki was revealed to be an act, and his true intentions for joining the organisation were to spy on it from within. Nonetheless, Itachi and his partner, Kisame, cooperated better than most Akatsuki partners, and despite the differences in personalities, appeared to have mutual respect for one another.

While a member of Akatsuki, he possessed incredible self-control of his emotions, constantly displaying an emotionless personality. He only showed surprise when opponents proved more powerful or skilled than expected, and even then didn't lose his composure. After his death, he has also been shown to have a sense of humour, such as questioning Naruto's claim that no one could survive Nagato's attack when Naruto clearly did, and calling his younger brother a "snake expert" while fighting Kabuto Yakushi.

Itachi had equally impressive intelligence, and was shown to be very wise, something even Tobi acknowledged. He was exceedingly sharp, observant, and intuitive, as he was rarely caught off guard or deceived. This intelligence could also be seen through Itachi's immense foresight; his foreknowledge of Sasuke's defeat of Deidara and simultaneous survival, his own pre-meditated death by Sasuke's hand, and most recently, the implantation of his own Kotoamatsukami-imbued crow inside Naruto were only some examples seen.

However, while Itachi was an extremely powerful shinobi, he was not arrogant, and even complimented his opponents at times on their abilities. After his death, Itachi realised that he shouldn't have tried to deal with Sasuke on his own and encouraged Naruto to never forget his friends. Likewise, Itachi took no enjoyment in violence or combat, instead preferring to avoid battle or, if not possible, end it as quickly as he could.

As Kabuto noted, Itachi also lived in deception. On top of his pretense in promoting Akatsuki's goals, he also pretended to seek the Eternal Mangekyō Sharingan. During a genjutsu fight with Sasuke, he claimed to have only let Sasuke live to take his eyes, and that the Uchiha clan had been tainted and evil, since many members would kill their friends to gain the Mangekyō Sharingan. Once the genjutsu was released, he called it his true self, implying his calm, emotionless personality was also a façade. This persona was later revealed to be only an act to ensure that he would die by Sasuke's hands. After learning Sasuke refused to go back to Konoha post-mortem, Itachi placed all his faith in Naruto, who he noted has inherited Shisui's will and was most determined to save and protect Sasuke. Despite all his treacherous actions, Itachi only did them all to protect Sasuke and Konoha. Finally, even while knowing full-well the dark sides of the village, he still considered himself a shinobi of Konoha.

Appearance
Despite his status as an infamous shinobi, Itachi's appearance was not the most intimidating, apart from the intensity of his gaze. While living in Konoha, he would regularly have a gentle look in his eyes, especially directed towards his younger brother. After joining Akatsuki, they would regularly have a stern look to them.

Itachi was a fairly tall young man with onyx eyes, black hair with bangs that framed his face and a low ponytail that reached into his upper back. The ponytail was, however, later obscured by the high collar of the Akatsuki cloak he wore after joining the organisation. Being brothers, Itachi and Sasuke had a similar appearance, so much so that Naruto nearly mistook Itachi for Sasuke when they first met. Itachi's most distinguishing characteristics were the long pronounced tear troughs under his eyes.

When he lived in Konoha, his casual clothes consisted of a black shirt with a large Uchiha clan symbol on the back, and pants with a weapons pouch strapped to his back. When on duty, he would wear the traditional ANBU uniform, although he was never shown wearing a mask. As a member of Akatsuki, he wore a slashed Konoha forehead protector and the traditional Akatsuki cloak. Sometimes, he would unbutton his cloak to mid-chest and rest his left arm there, rather than in the sleeve. After his cloak was incinerated by Sasuke's Kirin during their fight in Part II, it was revealed that he wore similar clothes to that of the rest of the Akatsuki. His attire consisted of a body mesh under a blue v-neck T-shirt with a sash around the waist, and blue pants. Like most members of Akatsuki, he wore the forehead protector of his home village with a horizontal line gouged through it to symbolise his broken ties with the village. On his right ring finger was his Akatsuki ring, which was red and bore the kanji for. He also wore dark purple nail polish on his fingers and toes and a necklace with three metal circles or rings.

After being reincarnated, Itachi's eyes appear to have black sclera like the other shinobi that Kabuto Yakushi reincarnated. He is also clad in a dark-red cloak.

Abilities
Even at a young age, Itachi's intellect and talent showed their brilliance in everything he did, as even his teachers said his progress hardly required any help. In the few battles he had been seen, Itachi was shown to be an incredibly powerful ninja, as demonstrated by his ability to easily defeat several powerful shinobi. When battling against Kakashi, Kurenai, and Asuma, Kakashi commented that Itachi wasn't fighting with even half of his strength. Despite his pride in his own strength, Kisame Hoshigaki, Itachi's partner in Akatsuki, acknowledged Itachi as the stronger of the two. Tobi said that Itachi never ceased to amaze him. Despite his impressive abilities, he never underestimates his opponents, given his praise of Jiraiya, saying the best he could do against the Sannin was a stalemate.

Itachi's only flaw in his fighting-style were his chakra reserves. Regardless, even with his failing health and his own preplanned death as inhibitions, Sasuke was still unable to defeat Itachi, who instead succumbed to his disease and the strain of maintaining his Susanoo on such low chakra. Despite the stress his body was under that was slowly killing him he was still able, in his last moments, to perform his own fūinjutsu.

Being a technical pacifist due to his traumatic experiences from the Third Shinobi World War, Itachi did not actively take part in battle, typically only acting in self-defence and trying to incapacitate his enemies instead of killing them if possible.

As a trained Konoha ANBU, Itachi is also proficient in kenjutsu.

Taijutsu
Itachi possessed high-level taijutsu skills despite not specialising in it. This was demonstrated when he easily defeated three fellow Uchiha, all of them his seniors and members of the Konoha Military Police Force. In Part I, he stopped Sasuke's Chidori with one hand and beat him during their reunion in the Land of Fire despite Sasuke's extensive taijutsu training for the Chūnin Exams. His skill in taijtusu could keep up with Naruto Uzumaki in his Nine-Tailed Chakra Mode and Killer B, though he retreated when facing both together.

Itachi was also noted to possess good reflexes and speed, particularly with his hand movements. This extended to collectively weaving both hand seals and throwing weapons, making it appear as if he could perform his techniques without seals; even skilled Sharingan-users like Kakashi and Sasuke had difficulty seeing his movements. He was also proficient with the Body Flicker Technique and was able to attack a target, then immediately move to the location they had retreated to, giving them no time to initiate a counterattack.

Ninjutsu
Itachi was a master of the Sharingan, and had great prowess with all of the three main types of jutsu. Itachi's signature moves were techniques that involved the usage of crows, able to summon a large flock of them and use them in both in ninjutsu and genjutsu. This is seen primarily with his creations of clones which dissolve into crows, and crows that hide as shuriken.

Traditional to the Uchiha clan, Itachi could use Fire Release techniques, including the clan's giant fireballs the intensity of which was enough to bother even Samehada. He could also infuse shuriken with fire for a devastating two-fold attack. He was also proficient with Water Release, able to perform them without an already existing water source. Itachi could catch his opponents off guard with drilling masses of pressurised water and large water dragons.

Shurikenjutsu
Even in his youth, Itachi could perfectly hit an intricate set of nine targets, one of which was hidden in a blind-spot, by accurately deflecting one kunai off another to ensure they struck mark. During his fight with the controlled Nagato, he was able to blind Nagato's summons despite the shared field of vision granted by the Rinnegan. Itachi was also very skilled with shuriken, with Sasuke stating that Itachi was best with such tools, even more so than their own father. During their fight at the Uchiha Hideout, Itachi was able to counter every one of Sasuke's shuriken with his own whilst simultaneously making a shadow clone, all despite his extremely deteriorated vision.

Sharingan
As noted by Kakashi, Itachi was a true successor of the Sharingan, developed and mastered by eight years old. He reached the stage where he could have his Sharingan activated for extended periods of time, with minimal drain on his chakra levels.

Itachi was especially praised for his skills in genjutsu, such as casting one by merely pointing at someone or turning opponents' genjutsu against them. According to Ao, he could even use his genjutsu to take control of other individuals from a long distance. With the Sharingan, Itachi reached the point where he could even make use of one of the Uchiha clan's ultimate dōjutsu, Izanami, and had knowledge of its counterpart, Izanagi.

Mangekyō Sharingan
Itachi possessed the Mangekyō Sharingan, which enabled him to use his most powerful techniques. With his left eye, he could use Tsukuyomi, a genjutsu that trapped opponents' minds in an illusory world, torturing them for what felt like days in a matter of seconds. With his right eye he could use Amaterasu, which created controllable black flames that could burn anything, including fire itself. His final technique was Susanoo, the, a technique that used both eyes to create a spectral being. It wielded the Sword of Totsuka, an ethereal sword with the ability to seal anything it pierced into the gourd that served as its hilt, and Yata Mirror, a shield that could reflect any attack. With the Susanoo also came his most powerful long-ranged attack, the Yasaka Magatama. During his battle with Kabuto, he also demonstrated the ability to partially manifest and control the various stages of Susanoo with great mastery.

Despite his mastery of the Mangekyō Sharingan, Itachi suffered greatly from its side effects. Each of the techniques bestowed by the Mangekyō Sharingan required vast amounts of chakra to perform, and left him fatigued afterwards, requiring him to deactivate his Sharingan altogether. From part I, three uses of the Mangekyō seemed to bring him to this point. The other side effect was that his eyesight would gradually worsen since the awakening of the Mangekyō Sharingan, and the degradation would only quicken after every time he used it, which would lead him to eventually go blind, with his Sharingan forever sealed away. By the time Itachi activated his Mangekyō Sharingan during his final fight with Sasuke, Itachi's eyesight was so badly damaged that Sasuke appeared to be only a messy blur and was so close to blindness that by the time he activated Susanoo, both Sharingan had lost the Mangekyō design, with only the red iris remaining.

Intelligence
Itachi has been shown to be analytical and perceptive, being able to deduce the inner workings and weaknesses of powerful techniques, even while under pressure. He orchestrated his battle against Sasuke to bring about his desired outcomes, and even account for the possibility that his plan wouldn't go as intended by sealing his power into Sasuke and placing a special crow inside of Naruto Uzumaki. Even Tobi himself admitted that if he hadn't kept a few secrets from Itachi he would be dead.

On top of his perceptive skills, Kabuto also noted that Itachi possessed skill in deception due to Itachi's ability to read people's feelings, and this made him a ninja of lies up until his death.

Search for Tsunade Arc
After the Invasion of Konoha and the death of the Third Hokage, Itachi and Kisame infiltrated the Konoha to find Naruto Uzumaki, the container of the Nine-Tailed Demon Fox. Before searching for Naruto, the two stopped for tea after a suggestion from Kisame. While there, however, they drew the attention of Kakashi Hatake, who had Asuma Sarutobi and Kurenai Yūhi follow them. Itachi and Kisame nearly managed to escape the village, before Asuma and Kurenai caught up with them in time.

After the two revealed their identities, Itachi and Kisame battled against Asuma and Kurenai. Despite their high ranks of jōnin, Asuma and Kurenai, even with the later arrival of Kakashi, could not beat them. After a short skirmish, Itachi activated his Mangekyō Sharingan and used Tsukuyomi on Kakashi's mind, which afterwards left Kakashi confined to bed for several days. When Kakashi revealed his knowledge of Akatsuki, Itachi instructed Kisame to kill them, but Might Guy arrived and deflected Kisame's attack in time. Guy revealed that he had already told the ANBU about the two Akatsuki members, and to avoid further confrontation, Itachi and Kisame retreated.

Itachi and Kisame tracked Naruto to a hotel where he was staying with Jiraiya at the time. Uninterested in provoking a Sannin, Itachi used a genjutsu on an attractive woman to draw Jiraiya away from Naruto. Taking the chance, Itachi and Kisame confronted Naruto, although, at the same moment, Sasuke arrived to seek vengeance on his brother. Itachi handled his brother with ease while Kisame and Naruto watched, although Jiraiya arrived in time to save the two boys, having not fallen for the hypnotised woman's charm.

When Jiraiya asked Itachi and Kisame if their real goal was kidnapping Naruto, they confirmed this, and Itachi understood that Jiraiya was the one who had told Kakashi about Akatsuki. Although Jiraiya wished to fight them himself and prevent others from getting hurt, he honoured Sasuke's feelings, and allowed him to fight Itachi instead. Itachi, however, used his Mangekyō Sharingan on his younger brother, thus reaffirming Sasuke's need to get stronger. Jiraiya saved Sasuke in time by using the Summoning: Toad Mouth Bind, which transformed the entire hotel hallway into a toad's oesophagus. Despite Jiraiya's claim that no-one had escaped this technique before, the two Akatsuki partners managed to evade capture by using Itachi's Amaterasu, which left him exhausted.

Although Itachi was actually supposed to capture Naruto, Itachi's only reason for returning to Konoha after the death of the Third Hokage was to remind Danzō and the other two village elders that he was still alive and not to harm his younger brother.

Kazekage Rescue Arc
While Akatsuki was sealing the One-Tailed Shukaku, the members discovered that Team 7 and Chiyo were en-route to their location. Itachi volunteered to distract them, so Pain used the Shapeshifting Technique on Yūra to create a body-double for Itachi. The lookalike, under Itachi's control, engaged the Konoha ninja. Itachi was impressed by Naruto and Kakashi's improvements in strength. However, because the clone had only a portion of his ordinary strength, it was killed by Naruto's Big Ball Rasengan. Nevertheless, he was able to buy enough time.

Itachi Pursuit Arc
As Sasuke was defeating Orochimaru, Itachi sensed something odd. Kisame asked him what was wrong, to which Itachi replied, "No, it's nothing." Following Kisame's capture of the Four-Tails, Itachi and Kisame met with the rest of Akatsuki. There, they discovered that Sasuke, after being trained by Orochimaru for two and a half years, had killed his teacher. Sometime after the Four Tails was sealed, Zetsu informed them that Sasuke had been killed by Deidara's C0. Kisame asked Itachi if he was troubled by Sasuke's death, because in the rain Itachi looked to be crying. However, Itachi remarked that Sasuke was not dead.

Knowing that his end was near, one of Itachi's shadow clones confronted Naruto, who was looking for Sasuke. Although he claimed he wished only to talk, Naruto attacked. After fending off Naruto, Itachi asked why he showed so much interest in Sasuke, a traitor to Konoha. Naruto replied that he was more of a brother to Sasuke than Itachi had ever been, and that he would do whatever it took to bring Sasuke home. This caused Itachi to give a small smile, followed up by asking if he would always feel that way, even if Sasuke attacked Konoha. In response, Naruto said that he would stop Sasuke without killing him and protect the village. Content with this answer, Itachi gave some of his power to Naruto through a crow that flew down Naruto's throat, and hoped Naruto would never have to use it.

After his business with Naruto was done, another of Itachi's shadow clones went to meet with Sasuke. Sasuke exhibited an improvement in his abilities during their confrontation, so Itachi agreed to have their final battle at the Uchiha Hideout. He waited there for Sasuke's arrival, instructing Kisame to not let the other members of Sasuke's team interfere with their combat. Itachi and Sasuke met face-to-face and, while exchanging genjutsu, had a conversation about Madara Uchiha, and Itachi's "true" motives of wanting to take Sasuke's eyes. When Sasuke managed to escape Itachi's Tsukuyomi, the genjutsu battle ended and the ninjutsu battle began.

Itachi used Amaterasu, but Sasuke protected himself by shedding his skin, a technique he could use after Orochimaru sealed within him. Using the shed skin as a decoy, Sasuke went below and fired a Fire Release: Great Dragon Fire Technique at Itachi's direction above although he only managed to burn one of Itachi's arms. Out of chakra, he told Itachi about his final jutsu that, like Amaterasu, was impossible to avoid. Sasuke then used his trump card, on Itachi, who got his Akatsuki cloak burned off as a result.

However, Itachi managed to survive by using Susanoo to defend himself. With Kirin having expended all of Sasuke's chakra, Orochimaru gained control and reappeared through his Eight Branches Technique. However, Itachi was easily able to cut off the seven snake heads, leaving only one behind whose mouth Orochimaru appeared out of. Orochimaru thanked Itachi for pushing Sasuke so far, thereby setting him free and allowing him to take control of Sasuke's body. Itachi, however, stabbed Orochimaru with the Totsuka sword to seal him away with Susanoo, removing the cursed seal from Sasuke's body.

As Itachi began to weaken, the Susanoo started to fade and Sasuke saw an opportunity to strike. This was in vain, as Susanoo was still able to protect Itachi with the Yata Mirror. His last option gone, Sasuke was pushed against a wall as Itachi stumbled closer to him, seemingly reaching for Sasuke's eyes. However, he instead poked Sasuke's forehead and smiled before saying, "Forgive me Sasuke… …It ends with this" — a reference to Itachi constantly poking Sasuke on the forehead when they were younger. With that, Itachi finally gave in to his fatal illness, which he had been using medication and sheer willpower to fend off, and died.

Konoha History Arc
In the anime, three years ago before Sasuke's defection from Konoha, Nekobaa mentioned about Itachi, but was stopped by Sasuke from talking about him. After Sasuke defeated Nekomata, he told Sasuke that Itachi had defeated him in the past along with his ninja cats and requested that Nekomata must fight Sasuke with all his might when he got older.

Later, Sadai, an assailant who entered the Land of Fire to capture Naho, mentioned to Sasuke about Itachi, the Uchiha Clan Massacre, and even about Sasuke being weak, which led Sasuke to defeat and punch him repeatedly.

Confining the Jinchūriki Arc
In an attempt to both impede Tobi and coerce him into joining forces during their initial encounter, Kabuto Yakushi demonstrated his capabilities by reincarnating many of the deceased members of Akatsuki, including Itachi, using Summoning: Impure World Reincarnation.

Shinobi World War Arc
As the Fourth Shinobi World War against the Allied Shinobi Forces commences, Itachi is mobilised alongside Kakuzu, who carries an immobile Nagato on his back. Later supporting the latter as they walk, the now isolated pair continue throughout the night, conversing about Akatsuki. Itachi remarks that their two dōjutsu together could achieve anything, which is likely why their summoner would wait for the opportune moment to use their abilities. After pausing at a shrine and discussing Kabuto's influence on Tobi's plan, they march onwards till dawn, when they encounter Naruto and Killer B.

Surprised by Naruto's growth and subjugation of the Nine-Tails, Itachi attempts to ask him something, but he instead attacks the pair involuntarily with his Fire Release: Great Fireball Technique. He discerns Kisame's death from B's possession of Samehada, and while exchanging both dialogue and blows with Naruto, is shocked and disappointed to learn his brother's decision to destroy Konoha, and Tobi's awareness of the truth behind the Uchiha clan massacre. Imploring Naruto to keep the truth secret for the sake of his clan's honour, he then entrusts dealing with Sasuke to him. As Itachi confronts B, he catches him in a genjutsu after using his Fire Release: Phoenix Sage Flower Nail Crimson technique. However, fending off several attacks, he retreats atop Nagato's summon and activates his Mangekyō Sharingan. Much to Naruto's shock, the crow Itachi had placed inside him emerges.

As Itachi and the crow's eyes meet, Itachi readies the Amaterasu. However, instead of hitting Naruto, it hits Nagato's other summon. Freed from Kabuto's control, Itachi turns on Nagato and engulfs him in black flames, before leaping towards Naruto. Itachi explains how he had implanted Shisui's eye into the crow, with the embedded Kotoamatsukami command "protect Konoha" upon seeing his eyes. This was originally meant for Sasuke in case he would attack Konoha with the Eternal Mangekyō Sharingan, but it overrode Kabuto's control over Itachi instead. Asked by B why he didn't just use Kotoamatsukami on Sasuke from the beginning, Itachi reveals that he had other intentions and that excluding augmentations, such as Hashirama Senju's chakra, Shisui's Mangekyō would take a decade to regenerate. Grateful that Sasuke had a friend like Naruto to pick up where Itachi failed, Itachi, along with Naruto and B, is then assaulted by Nagato's Shinra Tensei.

During Naruto's and B's battle against Nagato, Itachi blinds both the King of Hell and the chameleon summon with a barrage of kunai. This allows him to go undetected and free both jinchūriki from danger with his incomplete Susanoo. In response, Nagato uses Chibaku Tensei to lift and crush them with gravity. After careful analysis, Itachi surmises that attacking the sphere at the centre of the technique would effectively dispel it, so he proposes that they take advantage of Chibaku Tensei's attraction force to gravitate their strongest long-range techniques directly towards it. Using Yasaka Magatama in combination with the others' attacks, they confirm his conclusion. Before the dust settles, Itachi impales Nagato with Sword of Totsuka and asks for any last words.

After Nagato is sealed, Itachi states that he would deal with the Summoning: Impure World Reincarnation technique as he had already formulated a plan, allaying Killer B's concerns by reiterating that every technique had a weakness. However, when Naruto decides to stop the war on his own, Itachi tells him that despite becoming stronger, Naruto is forgetting all those who he wanted acknowledgment from and that with those egotistical thoughts, he would become like Tobi. Reminding him that his father became Hokage because of Kushina and those around him, he states that if Naruto has the same dream, he should not forget his friends. Itachi then incinerates his crow, stating that the eye cannot be reactivated for another decade and that Naruto, having inherited Shisui's will, could stop Sasuke without it. Realising that he tried to do everything on his own and still failed, Itachi refuses to see Sasuke and resolves to leave Sasuke to his friends instead. Asking B to look after Naruto, Itachi departs.

On his way to stop Kabuto's technique, Itachi encounters Sasuke but presses on without acknowledging him. This causes Sasuke catch him with a hand of Susanoo, but Itachi deflect this with his own, while noting that Sasuke now possesses the same technique as him. Bombarded by a series of questions, Itachi says he spared Sasuke at the massacre because of Sasuke's childhood innocence and his own desire to be judged for his act by a fellow Uchiha. Expressing his regret about the path Sasuke had chosen and partially blaming himself, he resolves to talk no further as he was already dead, which leads Sasuke to retort that Itachi is still running away from him even in death. Itachi breaks his silence to refute this, stating that he is not running away but that there are important tasks that needs to accomplish, in particular stopping the Summoning: Impure World Reincarnation technique.

Itachi attempts to prevent Sasuke from following by using a flock of summoned crows. He then destroys a wall with his Susanoo's arm, so as to confront Kabuto. Kabuto commends Itachi for finding him despite an erected barrier, to which Itachi responds that whilst under Kabuto's control, he gained knowledge of the location Kabuto's chakra came from. As Kabuto declares that he couldn't be killed if Itachi sought to stop the technique, Itachi senses Sasuke behind him and exasperatedly muses that things aren't proceeding as intended.

Listening as Kabuto tries to entice Sasuke into assisting him, Itachi deflects the shuriken that Sasuke later throws, informing his little brother that Kabuto had to be kept alive or else the Summoning: Impure World Reincarnation technique could never be stopped. He then stated his intent to use Tsukuyomi in order to find out how to halt the technique and force Kabuto to do so, before telling the latter — who was reciting the invulnerability of the technique — that every technique had a weakness and in this case, it was him. As Sasuke joins forces with him, he promises his brother that this time he would keep his promise and speak to him once Kabuto was stopped.

Advising his brother to remain cautious of the snakes, since they still seemed to be able to perceive them despite Kabuto obscuring his own vision, Itachi then teases Sasuke about being a "snake expert" when informed of why they were able to do so. Just as he warns of a potential trap, the snakes advance but activating their Susanoo, the brothers intercept them. Despite telling Sasuke not to be so crass after he severs the snakes' heads, Kabuto continues to elude them, so Itachi again warns his brother to be careful after being unable to detect the real Kabuto due to his scattered chakra. Later shocked by Kabuto's revelation that he had found the Ryūchi Cave, Itachi remarks that several of his suspicions had been proven correct, before readying himself as Kabuto attacks with his Sage Art: White Rage Technique.

As Itachi rushes to Sasuke's side, he is both deafened and blinded by the technique's activation, but begins to unravel its mechanisms despite the immobilising pain. Protecting Sasuke from Kabuto's advance even with his senses impaired, he responds to the latter's accusations by stating that he possessed no ability that could detect Kabuto's presence and had merely predicted his intent instead. When Kabuto then tries to implant doubt and mistrust amongst the brothers, Itachi asks if Sasuke remembered the time they dealt with a giant boar, with the two immediately taking action after Sasuke affirms. Itachi quickly launches his Yasaka Magatama at the area surrounding Kabuto to prevent his escape, providing Sasuke with an opportunity to pin his snake tail to the ceiling. As Kabuto — now dangling from the cave's roof — seemingly attempts to use Sasuke's sword to sever the tail, Itachi intercepts the swing but finds himself impaled in the process. However, his body shockingly disperses into a flock of crows, allowing the real Itachi to commandeer the blade and sever one of Kabuto's horns. Returning to Sasuke, he tells his little brother that beating a giant boar would likely be no problem for him now, to which Sasuke replies that dealing with the "snake" was the more pressing issue.

Listening as Kabuto once again attempted to inveigle Sasuke's loyalty, Itachi eventually told his brother to not heed Kabuto's words, as he was an even more convincing liar than himself. He then explained that while their village did have its dark side and inconsistencies, he still remained loyal to it as "Konoha's Itachi Uchiha". Despite admitting fault for Sasuke's current state and so, not being in any position to criticise him, he still desired to tell him something but only after Kabuto's defeat. Later responding to Kabuto's claims of invincibility, Itachi declares that Kabuto wasn't aware of the true power of the Uchiha and that the ultimate dōjutsu which would decide his destiny was already prepared. Repelled by Kabuto as he intercepts his strike, he advises Sasuke to remain close.

Anticipating Kabuto's next attack, Itachi uses his Susanoo to protect Sasuke, but is himself incapacitated. As Kabuto moves to rewrite the talisman in Itachi's head, Sasuke encircles them both with a ring of Amaterasu, cancelling out Kabuto's technique in the process due to the flames intense heat. Apologising to his brother, Itachi turns his attention to Kabuto and remarks that though they were very different, he could sympathise because in the past he too couldn't appreciate his true self or his limitations. He then goes on to declare that comrades were there to do what you couldn't and that those who aren't able to acknowledge their own selves were bound to fail.

Rejecting Kabuto's praise, Itachi asserts that he had failed and that the "Uchiha" name alone was nothing more than a display of his roots. Imploring Sasuke to not kill Kabuto and instead wait until his preparations were complete, the siblings came under attack once more, as a copy of Sakon — which emerged from the base of Kabuto's naval snake — transformed into Jirōbō and breached the protective circle of flames. Without pause, the brothers simultaneously use Amaterasu to incinerate the approaching, uncuttable web created by a copy of Kidōmaru. Trapped between more webbing and numerous invasive bones created by a Kimimaro copy, the two separate — with Itachi focusing on destroying the latter — and use their Susanoo to eliminate the threats. The siblings then retreated further into the cave, but this evasion was short-lived as Kabuto produced a copy of Tayuya to use an auditory genjutsu, which paralysed them both. As Kabuto produced a copy of Orochimaru's true form, Itachi chastised his belief that a person's reason to exist could be found through the imitation of someone they respected. Telling Sasuke to look into his eyes, he cast Tsukuyomi as Sasuke used his Sharingan genjutsu, effectively allowing them to enter each other’s minds and counteract Kabuto's technique in time to stop the copy of Orochimaru's true form from attacking them. After declaring that he would now use Izanami, Itachi is suddenly bisected by Kabuto who launched a surprise attack by emerging from the mouth of the subdued Orochimaru copy.

Calling out to his brother, who buys him enough time to regenerate, Itachi attacks Kabuto who countered his attack by driving Sasuke's sword into Itachi's chest. Disappearing into a flock of crows, he cuts off Kabuto's horn once again. This sequence of event repeats itself several times until it is revealed that Kabuto was actually trapped inside Izanami, which would continue to loop this sequence of events. Explaining Izanami and its origins as the counterpart of Izanagi to his brother, Itachi explains to an outraged Sasuke that he used this technique because he wanted Kabuto to acknowledge his real self before dying, unlike himself. After this, Itachi declares that he would now stop the Impure World Reincarnation.

Legacy
After the fight, Tobi collected Sasuke, tended to his wounds, and tried to befriend him when he awoke. When he removed his mask while doing the latter, Sasuke reflexively used Amaterasu on him. After quelling the flames, Tobi explained that the Amaterasu had been sealed in Sasuke by Itachi, intended to protect him from Tobi and whatever he might say. Sasuke was perplexed, so Tobi went onto detail the history of the Uchiha clan, and the truth behind Itachi's life. Towards the end of his story, he explained that Itachi had been dying of disease, but had kept himself going with medicine so that he could die by Sasuke's hands, stating that if Itachi had battled with all his strength they wouldn't be having that conversation. He also stated that Itachi had pushed Sasuke to his limits during their battle to draw out Orochimaru, so that he could remove the latter's influence from his beloved little brother.

Sasuke was unwilling to believe the story. Tobi persisted, saying that Itachi had entrusted the Uchiha name to Sasuke, hoping he would rebuild the clan on a new foundation of honour and nobility. For the sake of Konoha, and for Sasuke, he had been willing to die as a traitor and criminal. He had traded honor for disgrace and Sasuke's love for his hatred, and despite that, he died smiling. Finally accepting the truth, Sasuke was crushed to find that the brother he had hated had actually been looking out for him all along. Upon realising the truth, he awakened his Mangekyō Sharingan and resolved to take vengeance against Konoha for the massacre of his clan and the fate they placed on his brother, regardless of Itachi's love for the village. He also agreed to start working with Tobi and, as a result, is classified as an international criminal, something Itachi had tried to prevent by sacrificing everything he had, but even that had not been enough to deter Sasuke from doing so.

Danzō confirms that Tobi's allegations that Itachi massacred the Uchiha for the coup are indeed true during his fight with Sasuke. Danzō states that Sasuke's actions destroy the importance of Itachi's legacy of a man who loved his village and was willing to sacrifice much for it.

Sasuke initially refused to transplant Itachi's eyes into his own sockets, due to the two of them having completely different visions of the future. However, after his reckless overuse of his own Mangekyō Sharingan from battling Killer B, A, Danzō Shimura and Team 7, Sasuke's eyesight had greatly deteriorated. As such, he took Itachi's eyes to use them to destroy Naruto at full power. The transplant was then commenced by Tobi, and Sasuke stated that he felt Itachi's power flowing through him.

After being reincarnated by Kabuto and freeing himself from the control of the technique, Itachi helped both Naruto and Killer B defeat and seal away Nagato. After that, Itachi claimed to have a plan to stop the Summoning: Impure World Reincarnation, becoming an ally of the Allied Shinobi Forces.

Trivia

 * can be translated as "weasel".
 * Itachi ranked highly in the Shōnen Jump popularity polls for the series, continuously placing in the top ten and reaching sixth place once. In the latest popularity poll, he rose to fifth place.
 * He and Kisame were the first active Akatsuki members to appear.
 * Itachi and Kisame made a brief cameo appearance in the Hidden Leaf Village Grand Sports Festival!, where they were standing in line to use the bathroom, along with many other random characters.
 * According to the Third Naruto Databook:
 * Itachi's hobby was visiting traditional Japanese cafés.
 * Itachi wished to fight Sasuke.
 * Itachi's favourite foods were cabbage and onigiri with seaweed in it, while his least favourite was steak.
 * Itachi had completed 340 official missions in total: 53 D-rank, 152 C-rank, 134 B-rank, 0 A-rank and 1 S-rank.
 * Itachi's favourite word was.
 * Itachi had always poked his younger brother, Sasuke Uchiha, in the forehead when they were younger, saying . This is referred to very poignantly with Itachi's last words, as he pokes his brother's forehead again and says,
 * Itachi is tied with Jiraiya for having the highest stat total in the databooks.
 * Itachi is one of the few people who know the identities of both Naruto's father and mother.

Quotes

 * (To Sasuke)
 * (To Sasuke) "Being skilled isn't all that's it's made out to be. When you're strong, you become arrogant and withdrawn. Even if what you sought after was your dream."
 * (To Sasuke) "You and I are flesh and blood. I'm always going to be there for you, even if it's only as an obstacle for you to overcome. Even if you do hate me. That's what big brothers are for."
 * (To Yashiro, Tekka and Inabi) "You hold onto the organisation and your clan name. These things limit us and limit our capacities… These things deserve to be shunned. It is foolish to fear what we've yet to see and know!"
 * (To Yashiro, Tekka and Inabi) "I've had enough, there's no hope left for this pathetic clan. You forget what is most important to you because you cling to something small like your clan. True change cannot be made if it is bound by laws and limitations, predictions and imagination."
 * (To Sasuke)
 * (To Sasuke) "People live their lives bound by what they accept as correct and true. That's how they define "reality". But what does it mean to be "correct" or "true"? Merely vague concepts… their "reality" may all be a mirage. Can we consider them to simply be living in their own world, shaped by their beliefs?"
 * (To an infant Sasuke) "Don't cry, Sasuke. Your big brother is here to protect you, no matter what happens."
 * (To Kisame, after he related the story of the sharks) "We are humans, not fish. We don't know what kind of people we truly are until the moment before our deaths. As death comes to embrace you, you will realise what you are. That's what death is, don't you think?"
 * (Last words to Sasuke)
 * (About Shisui's teachings to him) "Self-sacrifice… A nameless shinobi who protects peace within its shadow… That is a true shinobi."
 * (To Sasuke about Kabuto) "Sasuke, don't listen to him. In other words, he can lie better than I can. Also… the village does have its dark side, and its inconsistencies. But I'm still Konoha's Itachi Uchiha."
 * (To Kabuto) "Those who can't acknowledge their real selves are bound to fail."
 * (To Kabuto) "That (imitating someone you respect) is something you do in order to grow. You can't use it as a disguise to pretend to be someone you are not."