Board Thread:Naruto Discussions/@comment-4688597-20140903132501/@comment-1512913-20140903165340

But a shadow isn't a tangible thing. A shadow is a reflection of light I believe. In fact if Naara techs were Yang Release, their techniques would use light instead of shadow, since they would give life to light. Shadow on another hand, is just a reflection, an illusion, just like genjutsu, makes sense Yin would be able to control it.