as japan left it’s feodal system of government, the different styles of jiu jitsu, developed in that period of time were the main tool for a person to continue practicing self defense. during this period the well known martial arts master jigoro kano (1860-1938) created a new style of jiu jitsu, which was based on throwing techniques. This allowed the practitioners to traing without systematically injuring themselves and their training partners. initially this new style was called “kano jiu jitsu”. Later it was given the name “Judo”. Judo is a national sport in japan and has been the main martial art, used by law officers in the country for many decades.