Board Thread:Theories and Speculation/@comment-25417671-20141203151145/@comment-25294339-20141207015638

I'm convinced of it as well. How they both are associated with the shade of black, and how Yin Release deals with the concept of creation from nothingness, while Amaterasu perfectly embodies that concept back me up. Pretty much anything related to the Sharingan can be argued to be associated with Yin, even the Uchiha clan itself.