Brazilian Jiu-Jitsu (BJJ) is a martial art that focuses on grappling and especially ground fighting.
Brazilian jiu-jitsu was formed from Kodokan judo ground fighting (newaza) fundamentals that were taught by a number of individuals including Takeo Yano, Mitsuyo Maeda and Soshihiro Satake.
Brazilian jiu-jitsu eventually came to be its own art through the experiments, practices, and adaptation of judo through Carlos and Helio Gracie as well as other instructors who were students of Maeda, such as Luiz Franca.
BJJ promotes the concept that a smaller, weaker person can successfully defend against a bigger, stronger, heavier assailant by using proper technique, leverage, and most notably, taking the fight to the ground, and then applying joint-locks and chokeholds to defeat the opponent.
It is not solely a martial art, but it is also a sport; a method for promoting physical fitness and building character in young people; and, ultimately, a way of life.