Board Thread:Fourth Databook/@comment-4366149-20141122004623/@comment-4271790-20141126233930

Another omission: It was stated in the databook that gaining power from Hagoromo grants Yin-Yang Release, yet Yin was omitted from Naruto and Yang was omitted from Sasuke.

Edit: Also, all genjutsu is Yin Release, and Hashirama used a genjutsu in the manga, but Yin was omitted from him.