Brazilian Jiu-Jitsu is a martial art that originated in Japan but emerged as popular in North America. It teaches using an opponent's aggression and strength against them through leverage and technique rather than brute strength. Royce Gracie is credited with popularizing Brazilian Jiu-Jitsu in the early Ultimate Fighting Championship (UFC) events by winning competitions using its grappling techniques against larger opponents. He learned the art from an early age from his father and brothers in the influential Gracie family in Brazil.