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Sometime during the second decade of the twentieth century, a “touring Japanese master” taught the rudiments of a secret, ancient, and scientific system of fighting called “jiu-jitsu” to a sickly Brazilian adolescent named Carlos Gracie, who taught it to his younger brothers, with the possible exception of the youngest, Helio, who taught himself. Meanwhile, Japanese immigrants in Brazil were practicing and teaching a fake form of jiu-jitsu, called “jiu-do” [judo] in order to keep their scientific combat art hidden from foreigners, except for the Gracies, who had already learned real jiu-jitsu from the touring Japanese master and wanted to share their knowledge with other Brazilians. That is the story, at least. Some of it might be true. Some of it probably isn’t.
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Roberto Pedreira (Jiu-Jitsu in the South Zone, 1997-2008 (Brazilian Jiu-Jitsu in Brazil))