Board Thread:Theories and Speculation/@comment-28323245-20160902000709

How long did Naruto take to master wind release and completed the rasenshuriken?

And based on this answer how long do you think that Naruto would take to master all nature transformations, in a cannon and explained way not like the "Oh he befriended the TB and so he can use all the 5 elements, so deal with it" 