Board Thread:Versus Debates/@comment-5085906-20180325121423/@comment-26107879-20180327051657

@Rachin

I wish what you said was true. However, it's not. It's stated specifically that Gengetsu and his Clam can't be sensed. He's also the Mizukage so probably knows the Silent Killing which is a General Skill. So Minato can't hear him either. Then we got the mirages distracting him on a regular basis. The only way to counter was sensing it utilizing physical sensing like Gaara did.

With that all said, Gen can kill Minato before Minato realizes what transpires. If he were to just blitz him before the set up though, he might be able to end it fast. However, Hydrification is insanely op, and physical attacks like stabbing or Rasengan, might not prove to be effective.

As someone pointed out earlier, Gen would just summon as Minato gets set up, so him throwing the Kunai is pretty much trapping himself in the Genjutsu by giving the Mizukage to set up.