Shuriken Ninja Stars

Ninja stars are traditional weapons of ninjas who were members of feudal Japanese espionage agencies. The ancient Japanese sword, available to the average person, was too cumbersome and slow to use in combat, so the ninja developed a deadly throwing weapon. 

These men were trained assassins and spies that mainly accompanied imperial armies. The weapons they carried complemented their fighting skills; they would utilize their swords, katana swords, and shuriken while fighting enemies on the battlefield but when they engaged in espionage, the ninja employed throwing knives and shuriken.

These ninja stars are made out of metal and usually with many pieces connected together in the center and sharpened at each end so that it resembles an icepick is a standard weapon in East Asian culture. The blades were made out of sharpened metal often multiple pieces fastened together, with the edges on both sides forming an S-shape. 

Ninja stars can also be attached to objects to form a shuriken. The word "shuriken" is a catch-all term for many different star-shaped throwing weapons. They are typically used as throwing weapons and, sometimes, stabbing weapons.  In addition to being used by ninjas to stab enemies during martial arts combat, they have been used for discipline training for centuries and children's play since ancient times.