Board Thread:Theories and Speculation/@comment-27082825-20150116155842/@comment-4912646-20150121153616

TheUltimate3 wrote: And I believe he stated the same in the manga but I do not know. Don't think Yamato said anything to that effect in the manga, but Jiraiya did. He said it was unheard of for Nagato to master all six five natures, but he may have been referring to the fact that Nagato did so by age 10. That said, I certainly get the impression that Kishimoto didn't originally intend to have so many characters (including Jiraiya himself) be capable of using four or even all five natures.