Fūma Shuriken

are large, four-bladed projectile weapon possessing pre-eminent sharpness and lethality. This type of shuriken is considered characteristic to the famous Fūma clan, after whom they were named and who possibly developed them. However, their use is not limited to this clan. The most commonly used ones can be collapsed for easy storage, leading to its nickname.

Although a Fūma Shuriken is normally characterised by curved blades, the blades can be of any shape, such as the straight-edged ones which cannot be folded, used by Mizuki and Obito Uchiha. Even the giant square-shaped ones utilised by Toroi are classified as Fūma Shuriken.

As Zabuza Momochi and Obito demonstrated, the shuriken can be used in melee combat by spinning the blade in one's hand to slash and stab the opponent directly. In Sasuke Uchiha's battle with Itachi Uchiha, he has shown the ability to rig the four blades to disconnect via pulling a connected wire and have them fire at ninety degrees to one another as a surprise attack, as well as imbuing it with lightning to increase its cutting power.

Trivia

 * Naruto Uzumaki's Wind Release: Rasenshuriken and its variants takes the form of a Fūma Shuriken.
 * Obito Uchiha's Mangekyō Sharingan pattern and its derived technique Kamui Shuriken takes the form of a three-pronged Fūma Shuriken.
 * This shuriken is prohibited to bring at the Academy.