Dan (rank) highest level that might be attained, with instructor certification and judge/judgment authorization being understood as higher-level or more sophisticated. Many arts use between one and ten dan ranks: In some martial arts, black belts are worn for all "dan" grades. In others, the highest grade (10th "dan") wears a red colored belt. In Jūdo and Shotokan 6th to 8th "dan" may wear a red and white-patterned belt and 9th to 10th "dan" may wear a solid red belt. There is some variation even within styles. Generally, belts do not have markings that indicate the actual "dan" grade. Okinawan styles used
Disability classification in judo less. Disability classification in judo Disability judo classification is the medical classification system for disability judo. Judokas with a disability are classified into different categories based on their disability type. The classification is handled by the Blind Sports Association. The blind classifications are based on medical classification, no functional classification. Beyond the level of vision impairment, research done at the Central Institute on Employment Abilities of the Handicapped in Moscow has found differences in functional capabilities based on differences in visual acuity. This does not play a significant role in judo. The sport's classification system is governed by the International