Brazilian Jiu Jitsu (BJJ) is a ground based fighting and grappling martial art that was born from Kodokan Judo, hailing from Japan. Judo was brought over to Brazil by several Japanese experts, including Mitsuyo Maeda, and was then adapted by Brazilians (the Gracie brothers), to form the new art form. Commonly known as rolling, fighters engage on the ground and try to gain ascendency through locks, chokes, guards, and mounts. A fighter can win by submission through locks and chokes, when their opponent can no longer continue to fight, and he or she is forced to tap out. BJJ is one of the most popular and effective martial art forms in MMA. Fighters can quickly end a fight using BJJ on the ground, and many of the top MMA fighters use BJJ as their preferred combat art.