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 where he was Canada's only competitor. Justin Karn, Tim Rees, and Tony Walby represented Canada in the 2012 Paralympics. Tom Thompson, head instructor at the Brantford Judo Club, has coached the national Judo team for the past four Paralympics. A video of Morgan explaining Paralympic Judo is available in the 'External links' section below. Judo is also practised by people with disabilities other than visual impairment, such as the members of the Jita Kyoei Judo Club at the Community Head Injury Resource Services in Toronto, who all have Acquired Brain Injury. Judo in such circumstances, however, is rare, non-competitive, and