Kakuzu's Abilities

is episode 84 of the Naruto: Shippūden anime.

Synopsis
Chōji's spiked cannonball attack proves ineffective against Kakuzu's special ability, which enables him to harden his skin. In Konoha, Yamato teaches Naruto about the five elemental chakra natures and their strengths and weaknesses in relation to each other, much to Naruto's dismay, because Yamato explains that Naruto's Wind Element jutsu will lose against Sasuke's Fire Element jutsu. But as Yamato explains further, Naruto learns that wind is the only element that can defeat lightning; Sasuke's Chidori. Meanwhile, Kakuzu gets struck by Kakashi's Lightning Cutter right through his heart, but survives and releases four masked entities from his back, one of which dies, as it had been struck by Kakashi. Kakuzu then uses the masks to attack Team 10 with powerful lightning, fire, and wind release jutsu.