Naruto: Shippuuden - Season 5 Episode 1 -

In the aftermath of the battle, Teams 7 and 10 return to Konoha. After examining Naruto, Tsunade officially classifies Naruto's new technique as a Forbidden Jutsu and warns Kakashi never to let him use it again. What is the terrible secret of the Rasen Shuriken that has left even Tsunade stunned by its power? Meanwhile, Orochimaru orders Kabuto to search for a woman who will help him reach his goal.