Hillcrest Academy is a member in good standing Very Brief Overview Of Jujitsu Jujitsu is an ancient system of unarmed combat that developed over many centuries in Japan. Over time, not only did different styles of Jujitsu (e.g., Aikijitsu, Goshin Jujutsu, Brazillian, etc.) develop that emphasized certain techniques over others, but entirely different systems emerged. For example, Judo and Aikido both have their roots in Jujitsu. But while Judo was created for the purpose of sport, the primary purpose of Jujitsu has remained constant: self-defense.