Board Thread:Versus Debates/@comment-31338621-20190129080042/@comment-31338621-20190206045956

AsianReaper wrote: Minato's the fastest ninja in history til Naruto. Itachi doesn't for sure have an opportunity.

Also yes. It was made clear from the beginning of the series that the keener your mind, the better chances you had at detecting and ignoring Genjutsu (like when Sakura was better at detecting Genjutsu than Sasuke in Part 1). Also needed is refined chakra control, which MInato obviously has, since he created the Rasengan. Genjutsu: Sharingan has a shot at slowing Minato down. Tsukuyomi would probably beat Minato. But anything less than those, I think Minato can render ineffective. Also, if Kakashi has time to warn his friends before Itachi casts his Genjutsu, Minato has enough time to avoid it. Also, Minato is a sensor, and a high-level one at that. He can probably sense chakra building up in Itachi's eyes and know to avoid them.

At the beginning of the battle, when they discern who they are fighting Itachi has an opportunity, for eye contact. If Minato tries to look at his body he can use finger genjutsu or the crow's sharingan genjutsu.

I checked and it said Sakura could see the genjutsu, because of her analysis skills and genjutsu know-how. We don't know how good Minato is at genjutsu. Also Sasuke didn't use the sharingan, in that instance.

Even if Minato keeps sensor mode on, it doesn't mean he could sense it before Itachi gets it off.