Wind
Kakashi is released from the hospital and begins Naruto's training program. Naruto learns that he has Wind-style chakra. Yamato helps by setting up the training field with his special jutsu. Naruto also learns that he can use his Multi Shadow Clone jutsu to speed up his training, since whatever the clones learn, the original user learns upon the clone's dispersal. Naruto and his mass of clones each take a leaf and attempt to slice it in half with wind chakra as the first step to creating his new jutsu.
Aired 17/04/2008EP 55 - Wind
Naruto: Shippuden
Naruto: Shippuuden is the continuation of the original animated TV series Naruto. The story revolves around an older and slightly more matured Uzumaki Naruto and his quest to save his friend Uchiha Sasuke from the grips of the snake-like Shinobi, Orochimaru. After 2 and a half years Naruto finally returns to his village of Konoha, and sets about putting his ambitions to work, though it will not be easy, as he has amassed a few (more dangerous) enemies, in the likes of the shinobi organization; Akatsuki.
(Source: Anime News Network)