Rank in Judo judo association. For a rank to be recognized, it must be registered with the national judo organization or the Kōdōkan. In Japan, the use of belt colors is related to the age of the student. Some clubs will only have black and white, others will include a brown belt for advanced kyū grades and at the elementary school level it is common to see a green belt for intermediate levels. In Europe the belt system is white, yellow, orange, green, blue, brown and black for both senior and junior practitioners. Judokas who have attained the 6th Dan may also use
Judo in the United States Many servicemen picked up martial arts during the war and returned home to teach them all across the country. The official judo federations formed in the 50s and 60s. The United States is not a major power in judo. Judo in the United States There are three main organizations that govern judo in the United States. The United States Judo Federation (USJF) started in 1952. The concentration of the USJF is on the east and west coasts, but also in Chicago and Hawaii. The United States Judo Association (USJA) was founded in 1968 as an extension of the Armed Forces