Itachi graduated at the top of his Academy class at age 7, had mastered the Sharingan by age 8, became a Chunin at 10 and was previously an ANBU squad leader at the age of 13. He was, until recently, the only known living person who possessed the Mangekyo Sharingan. Itachi has told Sasuke that if Sasuke were to obtain the Mangekyo Sharingan, the people able to use it will total three.He left Konoha about five years prior to the setting of Naruto, after slaying his whole clan with the exception of Sasuke Uchiha, his little brother. At 11, even Orochimaru feared him. Orochimaru had planned to use Itachi as his next host, but Itachi had become too powerful for even Orochimaru to handle, which is why he turned his attention to Sasuke.
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