Shurikenjutsu (手裏剣術, Literally meaning: sword hidden in the hand techniques) pertains to techniques that entail the throwing of shuriken, kunai, senbon or any other of a number of bladed, hand-held weapons. Shurikenjutsu can be used in combination with taijutsu, ninjutsu, and/or chakra flow in order to create more devastating techniques.
As a consequence of the versatility of the weapons involved, it is practised by nearly all shinobi to some extent. However, because of its value as a supplemental art, numerous more innovative techniques have been developed, including ones that can even alter the trajectory of the projectiles once they've be thrown. Expert users like Itachi Uchiha or Tenten, can use such methods to accurately hit targets that are even located in their blind spots.