Board Thread:Versus Debates/@comment-26998824-20150927013622/@comment-4080775-20151029025858

You do realize that Koto is a eye technique (visual) and the Rinnegan is immune to visual genjutsu. Any technique stemming from the eye is a Dojutsu, and because the eye is a visual organ, that makes Koto a visual genjutsu. Because the Rinnegan is immune to all visual genjutsu, it will not affect Nagato.