Shuriken

A traditional ninja weapon projectile that comes in various shapes for various purposes. Usually star shaped, Shuriken are implements designed to cause injury when thrown at an enemy, and most Ninja carry them at all times. Due to the disposable nature of these weapons, expensive materials are rarely used in their construction. However, they are crafted with great precision in order to stabilize their trajectory when thrown, thereby increasing accuracy.

Roppoken Style Shuriken
This particular type of Shuriken, which boasts six blades, is officially known as a Roppoken, or six-sided star, and is of the Kuruma-ken (round) category of Shuriken that spin when thrown.