Dan (rank) is by far the most recognizable symbol to the general public. The highest dan ranks are sometimes reserved for the founder or leaders of a style and only high-ranking students can be promoted to them. For example, only five living people hold a tenth dan in judo and only about thirty-five worldwide have been promoted to the rank since its inception; of those 10th dan promotions only fifteen were conferred by the Kodokan, all of them to Japanese judoka. This has led to upper level ranks becoming extinct in some arts. In other styles, the dan ranks are not the
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.