Ninjutsu, the art of the Ninja, is the discipline taught for several centuries in Japan (it is also called Budô Taijutsu of Ninpô Taijutsu). Budô is the generic name given to the various fighting styles developed in Japan.
Ninpô (or Ninjutsu) is a specific part of Japanese Budô.
Taijutsu (hand-to-hand combat technique) consists of techniques without weapons, such as striking, grabbing, twisting, throwing, strangling and so on.
As a fighting system, it relies on the natural strength of the body, the speed of reaction, of gesture and on the understanding of the principles that allow a person to reach a higher level of self-protection.
Taijutsu allows us to act at a motion level without having to use thought. Our body must simply move naturally, in harmony with the opponent’s energy flow.