Board Thread:Versus Debates/@comment-44916514-20200123204114/@comment-43403813-20200130025206

Yeah, Itachi had to activate Koto through a crow that was inside Naruto. Unless he has the eye in his head, I think its kinda stretching it to claim that it can be used to the same extent that it is used in a human being. It was specifically programmed to work on the eyes of Itachi Uchiha, so that it would work on Sasuke, so I don't think mid-battle the crow can change the type of eyes it locks onto: it wouldn't be able to affect Madara Uchiha's eyes. His main intention wasn't even to interact with Koto, it was to let it interact with Sasuke to bring him back to the Leaf.

@Jason

Regardless, for argument's sake let's say it is part of Itachi's arsenal, I think Madara would break out of it. Koto doesn't require eye contact which makes it broken af, but Koto gets cancelled if the target realises that they are caught inside a genjutsu. It's how Mifune broke out of it. Madara should have no problem sensing that Itachi is using an ocular genjutsu by seeing the build-up of chakra in his eyeball, and thus the genjutsu would be broken. If a transplanted single Byakugan can detect Koto, then an EMS or Rinnegan can too.

Also, even if you still think that Koto would work, it depends on what you think is faster: Madara performing 3 handseals, or Itachi activating the crow which would then trigger Koto on Madara.