Thread:Benknightprime/@comment-1875854-20140113015137/@comment-1875854-20140114000551

Okay then. Well Hayazumo is well-versed in chakra control from his father, who would've been a direct offspring of Jiraiya. But his father would've had somewhat good chakra control, because Hayazumo's father's mother was a shinobi with terrible chakra control. So Hayazumo's mother, who was a shinobi from Konoha, had good chakra control, as she was a travelling medic nin, talented in her own right.

Hayazumo thus would have great chakra control, something you need to master the Rasengan fully. He would've gotten this from his Jiraiya blood, but also from maternal sources. With this innate chakra control, he would've had more potential then others to master the Rasengan.

Also, since he is of Jiraiya's blood, Hayazumo is a perfectionist as well. But instead of the "ability to improvise or expand the limit of a techniques to the point where even an academic or E-rank techniques could make him an extremely formidable opponent", Hayazumo (from his maternal side, as medic-nin should try to conserve their chakra as much as possible to save as many people as possible. Thus they would try to use their chakra more efficiently, to save people faster) would use his chakra more conservatively and efficiently.

This allows him to have more potential to master the Rasengan than others. Sorry for not expanding on it before.