"Taijutsu is simply jutsu that use martial arts. Taijutsu does not always rely on chakra but can use it to enhance the power. Taijutsu is pretty much used by every single ninja but many specialize in it such as Rock Lee, Might Guy, Kimimaro, etc. Taijutsu is based a lot on speed, strength, creativity, and stamina. There are many different types of Taijutsu. You have Jyuuken, the EIG, Frog Kata. You also have people like Kimimaro who use Dead Bone Pulse or Tsunade who uses chakra to make herself have super human strength or the Raikages which use lightning along with their high speed and strength to create a sort of nintaijutsu. The possibilities are endless for Taijutsu."