Board Thread:Theories and Speculation/@comment-36512555-20200101053037/@comment-32685487-20200410022950

CyberianGinseng wrote: Calling it Chidori or not is irrelevant. That's just a one word name that everyone will immediately recognize and know what we're talking about, not an argument in an of itself. Nobody's going to say "the lightning change in chakra around Sasuke's hand!" when they can just say Chidori.

When Susanoo actually appears says next to nothing about when Itachi started gathering chakra for Susanoo. These are mere details you keep arguing about, not facets of the argument that make a difference. Sasuke lowered his hand Itachi started reacting then and finished reacting when Susanoo appeared as the bolt hit.

It's no different than any of the other top tier ninjas would do. It pales in comparison to Sasuke summoning that snake, genjutsuing him, and jumping in his mouth to be desummoned in the ass pull of the century. And we know Itachi was faster than Sasuke. Itachi "gathering chakra for Susanoo" is purely speculation. As shown in the series later a user can manifest Susanoo at a whim such as with vs Kabuto and vs Danzo. Susanoo def requires chakra as it is made of chakra, but it seems to be directly linked to the users chakra system instead of just being something they need to initiate first then use which is why it would be a reaction feat because if Itachi did not turn it on then he would be dead there. Besides Sasuke threw his hand down and Itachi was already looking upwards towards the extreme light, and Susanoo manifesting shows lines in it such as in the panel I showed with Itachi being blind from one Susanoo use. There were no lines from the Susanoo to the right or slightly behind Itachi in the one panel where he is looking up when Kirin is launched.

Oh and the whole point of Kirin was Sasuke had no chakra left for an actual jutsu which Itachi called him on it saying it was a bluff, as he has seen Sasuke using chidori and its variations multiple times already. Sasuke was not using any jutsu to initiate Kirin, he was using a small bit lightning natured chakra to initiate it.