This is a technique where the user encases themselves in a countless number of sharp needles, but in truth, the spikes are the user's hair. Chakra grants the strands of hair the hardness and shape of needles, endowed with a capacity to injure and kill on par with that of metallic weapons. In addition, if activated in response to an opponent's attack, it can also be used as a counter. The hair is made hard enough that it can withstand blows from certain types of weapons such as arrows.