Board Thread:Boruto Discussions/@comment-30168130-20170527042428/@comment-732150-20170527232849

Lorenzo.r.1st wrote: then why didn't it happen with Naruto? boruto didn't know he had wind release either. it would more sense if Naruto made it by accident, since he took more time to learn than boruto did in the first place, so more time for accidents to happen. and how do we know it from sasuke? Boruto might not know he added Wind Release to the Rasengan, but he certainly knew he had it. Just after capturing the panda, Boruto mentions in the Hokage office he can do wind, lightning, and most recently water nature transformation, even before getting the Kote. I believe that would also indicate Wind Release to be Boruto's affinity. Since Sasuke explains Boruto does it accidentally or subconsciously, I believe that also indicates why Boruto didn't end up creating Wind Release: Rasengan, like Naruto did. Naruto was deliberately training to add as much Wind Release into the Rasengan from the moment it begins forming. From Sasuke's explanation, Boruto does it suddenly, and most likely not as much Wind Release as Naruto did, as his Rasengan still looks like a normal Rasengan, with no hints of the blades forming.

AsianReaper wrote: Because Sasuke has the Sharingan and can see that sort of thing.

Can he though? When he fought Deidara, he deduced Deidara used Earth Release from his hand seals, not by seeing that the chakra was earth-natured itself directly. I mean, it would make sense for the Sharingan to be able to identify the nature transformation of chakra it sees, but I don't recall something like that ever being established. The closest thing to that I recall is Neji being able to tell that with the Byakugan in one of the Shippuden movies.