Board Thread:Naruto Discussions/@comment-24847491-20140920090914/@comment-3279282-20140921161709

No, it's not. Blaze Release is the release of a chakra nature, in this case black flames. Kagutsuchi does all the shape manipulation. Amaterasu is Blaze Release and can be formed through Kagutsuchi, something Sasuke displayed in the ice world.