Wind Release: Rasenshuriken

The Wind Release: Rasenshuriken was created by Naruto Uzumaki after he mastered the Wind Release: Rasengan. By manipulating the wind chakra of the Wind Release: Rasengan, Naruto was able to create four large points, making the Rasengan appear as a giant fūma shuriken, with the Rasengan in the centre remaining a perfect sphere. The technique gives off a loud bell-like screech after being formed. In order to perform it, Naruto requires the aid of two shadow clones; he provides the chakra, one clone is responsible for the shape transformation, and the other provides the nature transformation.

The Rasenshuriken creates countless microscopic wind-blades that damage the body on a cellular level. It produces so many individual strikes that even Kakashi Hatake is unable to count them all with his Sharingan. The wind blades sever nerve channels in the body, leaving the target unable to move after being struck. They also attack the chakra circulatory system, which cannot be repaired by any form of medical ninjutsu, depending on how severe the damage is, the target may not be able to perform a technique ever again. Because the Rasenshuriken does limited amounts of cellular damage to Naruto's arm when he first uses the technique, Tsunade labelled it a kinjutsu and likens the technique's effects to poison.

In addition to having the Rasenshuriken damage his arm, Naruto had difficulty maintaining the Rasenshuriken's stability when he first used it. It was prone to dissipating before it can even reach its target, requiring that he use it as a melee weapon and force it into the opponent, just as he does with the usual Rasengan.

Naruto later perfects the Rasenshuriken in Sage Mode, by encasing the Rasenshuriken in senjutsu chakra to maintain its shape. This allows him to throw it at his opponents and removes the possibility of it damaging himself. The range of shuriken now also expands after it has been thrown, compensating for imprecise aim or fleeing opponents by widening the area of effect. However, he can throw the Rasenshuriken quickly enough that this is rarely necessary. When thrown, the Rasenshuriken becomes Naruto's quickest attack, able to cross the entire Chibaku Tensei crater, which was the size of a mountain range, in a single second. When it exploded, it took up a large part of that same area.

When Naruto first uses the Rasenshuriken against Kakuzu, Kakuzu is caught in a vortex of wind blades. Other than the damage done to his cells, Kakuzu's body is left intact after being struck. After Naruto learns to throw the Rasenshuriken, the damage is greatly increased; not only is it capable of cutting through rocky mountains, but when Pain's Human Path is struck by it, most of its body is essentially disintegrated, leaving the top of the head. Even though it can now be thrown, it can still be thrust into the opponent.

The Rasenshuriken requires a great deal of chakra to perform, leaving Naruto very fatigued after using it under his own power. While in Sage Mode, however, he can use it twice in addition to other Rasengan variants. He must then re-enter Sage Mode to restore his number of uses. Naruto can also create and throw this technique in Nine-Tails Chakra Mode.

Trivia

 * In the second Naruto artbook and in the third databook, when Naruto is in his initial jinchūriki form, the Rasenshuriken coloured red. Masashi Kishimoto notes this to be because, like the Rasengan, he had yet to decide upon a colour for the technique. However, as of the colour cover of chapter 453, it is bluish white.
 * In Naruto Shippūden 3: Inheritors of the Will of Fire, Hiruko tries to absorb this technique, but was unable to combine the peak-levels of shape and nature transformation, like Naruto did at first. The sphere begins forming in his hand, but it becomes unstable and disperses, backfiring on him.
 * When thrown in Naruto Shippūden: Ultimate Ninja Storm 2, the Rasenshuriken would trap the target if it hit dead centre where the sphere was, pushing the target into the air and exploding.