Board Thread:Versus Debates/@comment-27429908-20160102030534/@comment-26636534-20160225232315

Actually, self inflicted pain is also another way to break yourself out of genjutsu. The sharingan can also somehow see through genjutsu. There is a big difference between being an expert at casting visual genjutsu on shinobi who do not know how to combat it, and actually trying to cast visual genjutsu on a shinobi that is an expert on combating it, which also possibly has built up some resistance to sharingan genjutsu. With that said it would be extremely unlikely that Hashirama would be caught in sharingan genjutsu.