What episode does Itachi join Anbu?

“An Uchiha Anbu” (暗部のうちは, Anbu no Uchiha) is episode 357 of the Naruto: Shippūden anime.

What year did Itachi join Anbu?

At age 7, he graduated from the Ninja Academy at the top of his class after only one year, mastered the Sharingan at age 8, passed the Chunin Exams at age 10, and became an ANBU Captain at age 13. According to Madara Uchiha, Itachi also had a lover, whom he killed during the Uchiha clan massacre.