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 Mehmedovic, who competed in the 2008 and 2012 Olympics. Musician Mark Kasprzyk, who previously went by the stage name 'Kazzer', was an alternate for Canada's 2000 Olympic Judo team. In the video for his best known song as Kazzer, "Pedal to the Metal" (2002), Kasprzyk confronts a bully (played by Sebastian Pawlak, also a judo fighter) and disables him using the Judo throw "ippon seoi nage". He now goes by 'Kaz' and is the front man for the group Redlight King, best known for a song titled "Old Man" (2011) that samples fellow Canadian Neil Young's song by the same