In what episode does Naruto first use Rasenshuriken?
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Shikamaru manages to trick Hidan which results in Kakuzu losing one of his hearts. Using his shadow imitation technique Shikamaru straps paper bombs to Hidan’s body and set them off.
Meanwhile back at Kakashi’s battle, Kakuzu is temporary disabled by the loss of his heart. However, one of his hearts returns to him, he then summons the last two in order to gain more power. After which he manages to trap Kakashi, Choji and Ino.
Just as he was about to finish them off, Team 7 arrives and a combo attack by Naruto and Yamato saves them. After engaging Kakuzu with shadow clones, Naruto is seen in a flashback where he uses the Rasenshuriken for the first time to counteract Kakashi’s Rasengan.
* Summary contains events in episode 86 and 87