The Nin Shuriken (shortly Ninja Stars) are small throwing stars used by the Ninja Strike Rangers to unlock their powers, forms, and Mecha by placing them into the Ninju Sword, then spinning them. The Ninja Stars can also throw copies of their Transformation Nin Shuriken for various kinds of attacks. The Nin Shuriken are divided into three types: Transformation Nin Shuriken, Technique Nin Shuriken, and Companion Nin Shuriken.