Rasengan
Name: Rasengan (Both English and Japanese), 螺旋丸, literally "Spiraling Sphere", Uzumaki Chronicles "Power Strike"
Type: A-rank, Offensive, Short range (0-5m)
Users: Fourth Hokage, Jiraiya, Naruto Uzumaki, Kakashi Hatake
The Rasengan requires no hand seals to perform, instead relying entirely on the chakra control of the user. Once the user creates a stable Rasengan, however, it becomes self-sustaining, so the user does not need to provide any more chakra after forming it. The force of the spinning chakra grinds into whatever it touches, causing major damage. The force of the attack also causes significant internal injury. The user can also release the spinning chakra, creating a violent explosive force at the point of contact. The one drawback of the Rasengan, if it can be considered as such, is that it requires great chakra control.