Board Thread:Naruto Discussions/@comment-29332822-20170114021458/@comment-734582-20170114094749

AsianFishTacos wrote: Konohamaru mastered the Rasengan, a jutsu that the FOURTH HOKAGE took three years to master/make. To make, yes. Learning it doesn't take 3 years.

EDIT:

For context, it took until the 4th war for Kiba to use Shadowclone. Naruto needed his insane stamina to relentlessly train for Rasengan. So yea, Konohameru's good. sadly he was so damn annoying.