Shihan Helder Nunes, 6th Dan Jiu Jitsu, is the International Coordinator for the International Jiu Jitsu (JJI), and leader of Kyoo Soku Seishin Ryu (Style of Fast and Powerful Soul), a School that includes the two sides of its creator, sometimes tough and dynamic, and sometimes gentle and peaceful. This first work shows the essence, concepts and techniques of the Ju-Jitsu practiced at the JJI, supervised by Great Master Soke R. Morris; a powerful, rough Ju Jitsu, completely focused on self-defense and on a direct and economical concept of combat.