Monkey - Dragon - Rat - Bird - Ox -
Snake - Dog - Tiger - Monkey
Ox - Rabbit - Monkey
The Chidori is Kakashi Hatake's first original jutsu, though he more frequently uses an S-Rank version known as the Lightning Blade. He created it around the time he was promoted to jonin, and later taught it to Sasuke Uchiha and mastered by Rasoki Senju.
Description and Effect
This jutsu channels a large amount of lightning style chakra to the user's hand. The amount of chakra is so great that it becomes visible. The high concentration of electricity produces a sound reminiscent of many birds chirping, hence the name. Once the jutsu is completed, the user charges forward and thrusts the Chidori into the target. This produces heavy amounts of damage that is usually fatal. This jutsu is classified as an assassination jutsu because of the speed at which it is performed, despite the loud noise it produces.
This technique has a major drawback, however. The speed at which the attack must be done, combined with the fact that the user must run in a straight line, causes a tunnel vision-like effect for the user. This allows the enemy to easily counter the attack, making it a potentially lethal move for the user. Though this drawback would seem to make learning the technique fairly pointless, Sasuke and Kakashi are able to avoid the drawback because of their Sharingan, and Rasoki as he draw enough strength to handle it's electrical amount of chakra, which takes in every detail, regardless of how fast the user is moving.
As an additional drawback, the large amount of chakra required limits the number of times this technique can be performed per day. In the original series, Sasuke can only use it twice a day (under his own power) and Kakashi can use it four times, though their limits have been shown to have increased to an unspecified level in Kaipuden. Should the user attempt to go beyond their limit, all of their chakra will be drained and their very life force could go along with it.
An additional problem, though not necessarily a debilitating one, is the fact that the large amount of chakra can also injure the user's hand if they put too much force into the attack. In the original series, Sasuke does this when confronting his brother Itachi, causing some of the skin to peel from his hand and leaving it slightly smouldering after the attack was finished.