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 and film, but it has not been absent either. Most of Judo's television appearances that are not directly related to the Olympics occurred in the 1950s on either the CBC or its French-language counterpart Radio-Canada, and coincided with the spread of new Judo clubs throughout the country following the Second World War. The earliest seems to be an interview at the Ottawa Judo Club, conducted in French by then-journalist René Lévesque and accompanied by a demonstration, in 1955. Another French-language interview and demonstration, this time focusing on the role of women in Judo, also aired on Radio-Canada two years later.