Interestingly, Koma was one of five "Guardian" instructors sent by Professor Jigoro Kano to the United States to teach U.S. military men the art of Judo. These instructors were requested by President Theodore Roosevelt. Koma had been personally trained by Kano.
The duties of Koma's position
were to oversee Japanese immigration to Brazil. This is what brought
my grandfather and Koma together. The friendship between them became
so strong that Koma decided to do something that was not normally done.
He taught Jiu-jitsu to my father, Carlos. This was about 1918.
My father then decided that he should share the gift that Koma had given him so that Jiu-jitsu would never die out in Brazil. This is when the first Gracie Jiu-jitsu Academy was started. (Secrets of the Masters, Sept.1993).
Carlos Gracie had twenty-one children, one hundred six grandchildren, and one hundred twenty-eight great-grandchildren. Of his twenty-one children, all ten of his sons became black belts. Combined with their ancestors in Scotland and Ireland, the Gracie family could be the largest family in the whole world.