Board Thread:Naruto Discussions/@comment-24847491-20140920090914/@comment-3279282-20140921112201

Guys, remember that when Amaterasu was called the highest form of Fire Release, there was no Blaze Release yet. Kishimoto thought about that only a few years later. And Blaze Release would still be the highest form of fire release, since it releases fire (unlike other advanced natures involving fire release), just on a stronger scale.

If we'd compare it to the Rasenshuriken, it would be

Futon: Rasen Shuriken

Enton: Amaterasu Kagutsuchi

Futon equals Enton, Rasen equals Amaterasu, Shuriken equals Kagutsuchi.