Dan (rank) highest level that might be attained, with instructor certification and judge/judgment authorization being understood as higher-level or more sophisticated. Many arts use between one and ten dan ranks: In some martial arts, black belts are worn for all "dan" grades. In others, the highest grade (10th "dan") wears a red colored belt. In Jūdo and Shotokan 6th to 8th "dan" may wear a red and white-patterned belt and 9th to 10th "dan" may wear a solid red belt. There is some variation even within styles. Generally, belts do not have markings that indicate the actual "dan" grade. Okinawan styles used
Judo in Canada (2011), Raymond Damblant (2012), and Hiroshi Nakamura (2012). Eleven Canadians are ranked "hachidan" (eighth dan), twenty-seven are ranked "shichidan" (seventh dan), and approximately 85 others are ranked "rokudan" (sixth dan). The names of the ninth and eighth "dan" holders are listed in the tables to the right. A typographic dagger () follows the names of those who are deceased. A registry of approximately 5000 black belts ranked "shodan" (first "dan") to "hachidan" (eighth "dan") in the years 1946–1997 is included in Glynn Leyshon's book "Judoka: a history of Judo in Canada". Canadians have won five Olympic medals in Judo since