Board Thread:Naruto Discussions/@comment-45851667-20200520192705/@comment-34656247-20200523195340

Ok so Shisui hadn't enough time to experiment to proves how they know it takes 10 yrs to recharge. Your timeline says shisui died at 13 and unlocked ms at 6, that's only 7 years. Itachi gained Shisui's MS at age 11 but he died at 21, that's exactly 10 years, he could've experimented on the crow, by using Koto during age 11, which recharged at age 21, coincidentally the same year he died and transferred the crow to naruto. ---The eye resting in his open palm floated up, covered the bird's left eye and merged with it, as if sucked in. --- Which could explain that ^, now if Shisui's eye is MERGED with the crow, and Itachi says it take 10 years to recharge, won't that mean the same would apply to the original as the eye wasn't even transplanted, but used to form a single entity with that of the crow's. The evidence is more against the other argument, with Danzo being most of it. He clearly couldn't spam it as he wish, and whoa surprisingly he has Hashirama cells, and whoa surprisingly he can use it more than once in a single day now, and whoa that's coincidentally something Itachi said.
 * Now the problem with the recharge time being unique to the crow only is what I don't understand, what's the explanation behind that? Kakashi could hardly maintain base sharingan all the time, he had to keep it covered, but the crow just kept it going for 10 whole years. Know why? the novel states Shisui merged his MS with the crows eye.

If you're still gonna say Itachi was speaking only about the crow, note that a crow couldn't handle hashirama cells as Itachi said that that cells would reduce the cooldown.