Ronin-Do is a mixed martial arts system developed by Ronin-Sensei, Russell G. Carter, Jr., a member of the Grandmaster's Council of the United States Martial Arts Association under which Ronin-Do is registered. Ronin-Do is translated as "The Way Of The Masterless Warrior". "Ronin" is the Japanese term used to describe masterless samurai during the feudal periods in Japan. Although Ronin-Do was developed in the USA, its mental, spiritual and physical principles and techniques are grounded on Japanese Bushido.