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 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.