Rank in Judo are ranked in ascending numerical order. The ninth ("kudan") and tenth degree black belt ("jūdan") and, theoretically, those higher, have no formal requirements. Only 15 individuals have been promoted to the rank of Kōdōkan 10th dan. On January 6, 2006, three individuals were promoted to this rank simultaneously: Daigo Toshirō, Ichirō Abe, and Ōsawa Yoshimi. This is the most ever at the same time, and the first in 22 years. No one has ever been promoted to a rank higher than 10th "dan", but in theory the Judo rank system is not limited to 10 degrees of black belt. The
Judo in Brazil in Rio de Janeiro. This event marked the first time Brazil hosted a mixed-gender World Judo Championship. Brazil ranked second overall in medals behind Japan at the 2007 Championships, earning three gold medals along with a bronze. In 2013, Brazil once again hosted the World Judo Championships, this time placing fourth overall behind Cuba, despite surpassing Cuba in total number of medals. In this event, Rafaela Silva made history by being first Brazilian Judoka to claim gold in a women’s division. Judo in Brazil The practice of the Japanese martial art of Judo in Brazil dates back to 1914, and