1. Armor Defense: Amaterasu's black flames burn slowly and only on the surface of objects. For example, when Sasuke used it on a samurai wearing thick armor, the flames only burned the armor, leaving the samurai unharmed.

2. Sealing Jutsu: Although Amaterasu cannot be extinguished, it can be sealed with a sealing jutsu. For instance, Jiraiya sealed the flames when Itachi used Amaterasu to burn his barrier.

3. Tailed Beast Cloak and Susano'o: The Tailed Beast Cloak and Susano'o both utilize materialized energy. The cloak prevents Amaterasu from contacting the jinchuriki's body, as seen in Naruto's fight against Sasuke. Similarly, Susano'o is impervious to Amaterasu.

4. Physical Defense: Objects or techniques like Earth, Wood, or Water Style can be employed to block Amaterasu. Gaara used his sand to block it during the Five Kage Summit.

5. Body Flicker Technique: Amaterasu's activation speed is not very fast, making it avoidable with fast reaction speeds. Techniques like the Body Flicker or Flying Thunder God can be used to evade it. Hence, Amaterasu is not as powerful as believed. Itachi likely never killed anyone with it. Can you think of other ways to counter Amaterasu?