Board Thread:Versus Debates/@comment-32457608-20170702132834/@comment-5085906-20170705202406

Bipedmango wrote: i feel people kinda overhype koto too i mean if it was that powerful than instead of itachi using it to free himself he would have used it to make kabuto reverse the reanimation jutsu. That couldn't happen because Itachi explained that the Kotoamatsukami takes a decade to re-activate once it's used. He unfortunately didn't have the foresight to predict Kabuto's entire plan, cause if he did he probably would have programmed it to react to Kabuto instead of his own eyes.

I get the confusion about the visual contact aspect of Kotoamatsukami since not everyone reads databooks, but the bit about the Kotoamatsukami's re-activation period was explained in both the manga and the anime. Maybe if you bothered to check...