Shuriken (sometimes known as a Ninja Star) means hidden sword in Japanese, which is exactly what it is! Shuriken is a weapon usually kept in a sleeve of a person. This can be a very good weapon for assasinating people, maybe even better than a Knife at doing this! Shurikens are usually used by ninjas. Shuriken are good at slashing, stabbing, and even throwing in some cases. There is even an art for wielding this weapon called Shurikenjitsu. Usually, this weapon is made out of wood or metal.