Board Thread:Versus Debates/@comment-26636534-20170619154549/@comment-26636534-20170620133257

@Killer723

Itachi doesn't have all the intel on Minato. Since Minato was quite famous and Hokage he probably knows of him, but I doubt in detail.

On the other hand, Hokage Minato knows a lot about the Uchiha clan in general. As Hokage, it is not so unreasonable to assume that Minato knew the particulars of the Uchiha clan and all the other clans. He certainly knew about Madara. Uchiha's are particularly known for their Fire release, genjutsu and shurikenjutsu and of course, the Sharingan's predictive capabilities.

Minato also had a student that was an Uchiha and saw how the sharingan was used to complete Kakashi's Raikiri. With all this in mind, it is highly unlikely that Minato will be surprised at Itachi skills.

Now, would Minato be caught in genjutsu? I'd say highly unlikely. Due to Minato's battle style, he wouldn't give Itachi a chance to cast non-sharingan genjutsu. Ephemeral and crow clone genjutsu have only been used on Naruto and not conclusive enough to say it would work on Minato as well.

There are also some issues with these jutsu's, as if they were as powerful as you say they were, why were they not used on Kabuto when Itachi and Sasuke fought him?