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
Jim Webb (judo) in Japan. He was a long-time student of 9th Dan Vince Tamura. Dr. Webb was educated at West Point, the University of Dallas, MIT, Southern Methodist University, and the University of Maryland. He subsequently provided leadership to such prominent consulting firms as Price Waterhouse, Deloitte & Touche and A.T. Kearney. Prior to his strategy consulting career, he served as a Special Forces commanding officer. He is currently a professor and program director at Southern Methodist University. Jim Webb (judo) James R. Webb is an American businessman who is a former President of the United States Judo Association elected in 2006.