Ninjutsu, or Ninja Arts, is the basic fighting style of ninjas, as kinjutsu, senjutsu etc and advanced forms. The nature transformations, such as Lightning, Fire and Water, at advanced forms of ninjutsu, requiring nature manipulation. Ninjutsu is usually done with the combination of pure chakra and had seals and is considered the opposite of genjutsu as its attacks are physical. It can also be combined in a specific way with taijutsu to form nintaijutsu.