Rasengan


 * Name:Rasengan, 螺旋丸, literally "Spiraling Sphere", English games "Power Strike"
 * Type:A-rank, Offensive, Short range (0-5m)
 * Users:Fourth Hokage,Jiraiya,Naruto Uzumaki,Kakashi Hatake

Invented by the Fourth Hokage, this technique is done by spinning chakra from your hand into a ball of concentrated, spinning chakra, and is unique in that it does not require hand seals. According to Jiraiya, it took the Fourth Hokage 10 years to develop it, and also states that the Rasengan is not completely finished when the Fourth Hokage died. This shows that the technique would have been extremely powerful if completed.

While in training, Naruto improved the Rasengan with the Big Ball Spiraling Sphere, or Oodama Rasengan.