The ninja employed over 400 special weapons and tools to accomplish their missions, and the shuriken is undoubtedly one of the most famous. In this episode, we'll examine not just how the shuriken was thrown, but ninja techniques for throwing it with a string attached, and using it defensively. The ninja also devised various throwing techniques such as "yoko-uchi," "hon-uchi," and "gyaku-uchi." We'll use cutting-edge science to examine their uses, and use the shuriken to draw closer to the ninja truth.