Board Thread:Versus Debates/@comment-44916514-20200123204114/@comment-43403813-20200131103041

@Senjutsu. That still doesn’t prove that Koto is a technique that Danzo needs to maintain. Koto is not a continuous genjutsu where the caster has to maintain it indefinitely. Danzo had nothing to “stop”, the genjutsu was already cast, and it wore off once Mifune realised (from Ao’s outburst).

Imagine if you did have to maintain it; that would completely ruin the brokenness of the technique, since Itachi’s chakra supply would swiftly deplete when he has to maintain this tech, before too long, and the technique wouldn’t even last once the target is out of sight.

Senjutsu Sage wrote: @Hal. It's really true that Danzo stopped Koto. Mifune even ventured to ask Ao if Danzo's "jutsu was still in effect." Ao replied saying, "No, right now the flow in his chakra network is quiet, the jutsu's undone."

Now, in regards to your quote, Ao described his chakra network, and Shisui’s eye in particular. Naturally, the network would have become quiet anyways once Danzo had executed the technique. Do you think Shisui’s eye would have remained active forever when it was cast on Itachi Uchiha? Because it clearly didn’t.

Mifune’s clear change of tone indicates his realisation, which happened right after Ao declared that Danzo was using genjutsu. That’s what made Mifune realise.

>>> To sum up, the whole premise of Kotoamatsukami is for the caster to give an idea of theirs to a specific target, that the target thinks is their own original idea. Even through logical deduction, once the target realises that the idea is not their own, the genjutsu is broken. That’s why Koto is considered a “subtle” genjutsu. Mifune was saying what Danzo wanted: to give the Hokage (him) control of the situation. But then Koto was broken when Mifune realised that this idea came from Danzo’s Koto. Did that clear it up?