Amaterasu is one of Itachi Uchiha abilities when he activated Mangekyou Sharingan, two others are Tsukuyomi and Susanoo. Amaterasu is generates black flames at his focal point that will continue to burn until the target is reduced to ash. Itachi reveal his Amaterasu when he and Kisame got caught by Jiraiya inside Frog stomach. Itachi used Amaterasu to make hole and run away. Itachi used again his Amaterasu when he was fight with his litlle brother Sasuke Uchiha. Before he dies during his battle with Sasuke, Itachi implants his Amaterasu in Sasuke's eyes, hoping that doing so will eventually kill Madara Uchiha.
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