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
Rank in Judo a patch specifying the practitioner's level. This is true for both "kyū" and "dan" levels. The USJF Juniors ranking system specifies ranks to 11th "kyū" ("jūichikyū"). The USJA Juniors ranking system specifies twelve levels of "kyū" rank, beginning with "Junior 1st Degree" (equivalent to "jūnikyū", or 12th "kyū") and ending with "Junior 12th Degree" (equivalent to "ikkyū"). As with the senior practitioners, the USJA recommends that juniors wear a patch specifying their rank. When a USJA Junior reaches the age of 17, their conversion to Senior rank is: Rank in Judo In Judo, improvement and understanding of the art is