In the mid-1800's in Japan, there were a large number of styles ("ryu") of jiu-jitsu (sometimes spelled "jujitsu"). Techniques varied between ryu, but generally included all manner of unarmed combat (strikes, throws, locks, chokes, wrestling, etc.) and occasionally some weapons training. One young but skilled master of a number of jiu-jitsu styles, Jigoro Kano, founded his own ryu and created the martial art Judo (aka Kano-ryu jiu-jitsu) in the 1880's. One of Kano's primary insights was to include full-power practice against resisting, competent opponents, rather than solely rely on the partner practice that was much more common at the time.

One of Kano's students was Mitsuo Maeda, who was also known as Count Koma ("Count of Combat"). Maeda emigrated to Brazil in 1914. He was helped a great deal by the Brazilian politician Gastão Gracie, whose father George Gracie had emigrated to Brazil himself from Scotland. In gratitude for the assistance, Maeda taught jiu-jitsu to Gastao's son Carlos Gracie. Carlos in turn taught his brothers Osvaldo, Gastão Jr., Jorge, and Helio.