Roberto Satoshi, also known as Roberto "Toshi", is one of five successful grappling siblings: Mauricio Dai de Souza, Marcos Yoshio de Souza, and Cristiane Yukari de Souza, all children of the late Master Adilson de Souza. Roberto became a big name in Jiu Jitsu after his win at the World Championship in 2010 (brown belt), being considered after that tournament one of the hottest prospects in BJJ. A status well solidified in the years that followed with wins at the European Open, Rickson Gracie Cup and many other tournaments.