In Judo, improvement and understanding of the art is denoted by a system of ranks split into ky? and dan grades. These are indicated with various systems of coloured belts, with the black belt indicating a practitioner who has attained a certain level of competence.
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The K?d?kan Ky?-Dan ranking system
Practitioners of Judo (???, J?d?ka) are ranked according to skill and knowledge of the art. Their rank is indicated by the colour of belt that they wear. There are two broad categories of rank: those who have attained a level of competency at which they are considered worthy of a black belt (??, kuro obi) and who hold dan (?) grades and those who are yet to attain that level and who hold ky? (?) grades. Those who hold dan grades are collectively termed Y?dansha (???) (literally "person who has dan") and those with ky? grades are Mudansha (???), literally "person without dan".
This ranking system was introduced by Kan? Jigor?, the founder of judo, in 1883. However, the current system is not the original one, but based on Kan?'s last system introduced between 1926-1931, with some modification shortly after Kan?'s death in 1938. The first dan grades were awarded to his students Saig? Shir? and Tomita Tsunejir?. Since then it has been widely adopted by modern martial arts.
In the current system as in use in Japan, there are six student grades ranked in descending numerical order. Beginners were given the rank of sixth ky? (??, rokky?) and wore a light blue belt. Once they had passed an elementary level of instruction, they were promoted to fifth ky? (??, goky?), when they would adopt the white belt. This they wore through fourth ky? (??, yonky?). The remaining three grades (third ky? (??, sanky?), second ky? (??, niky?) and first ky? (??, ikky?) were all indicated with brown belts (for seniors) or with purple belts (for juniors).
1st ky? is the last ky? rank before promotion to first degree black belt (shodan). There are ordinarily 10 dan ranks, which are ranked in ascending numerical order, though in principle there is no limit to the number of dan ranks.
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Highest ranking j?d?ka
K?d?kan-graded j?dan holders
The ninth (kudan) and tenth degree black belt (j?dan) and, theoretically, those higher, have no formal requirements. Only fifteen individuals have been promoted to the rank of K?d?kan 10th dan. On January 6, 2006, three individuals were promoted to this rank simultaneously: Daigo Toshir?, Ichir? Abe, and ?sawa 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 English language copy (1955) of Illustrated Kodokan Judo, edited by the K?d?kan, says:
There is no limit...on the grade one can receive. Therefore if one does reach a stage above 10th dan... there is no reason why he should not be promoted to 11th dan.
This statement was later clarified, however. Essentially, the dan-rank system was capped at 10 after the death of Kan?. In that respect, in the November 1963 issue of J?d?, the K?d?kan's official magazine, the K?d?kan responding to the question "Do the 11th and 12th Dan really exist ?" clarifies that the hierarchy now stops at 10 and that the K?d?kan does not envisage any nominations to these grades.
There have only been fifteen 10th dan promotions awarded by the K?d?kan in the history of Judo.
Variations in rank structure
Although dan ranks tend to be consistent between national organizations there is more variation in the ky? grades, with some countries having more ky? grades. Although initially ky? grade belt colours were uniformly white, today a variety of colours are used. The first black belts to denote a Dan rank in the 1880s. Initially the wide obi was used; as practitioners trained in kimono, only white and black obi were used. It was not until the early 1900s, after the introduction of the judogi, that an expanded colored belt system of awarding rank was created.
Belt colors
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For dan ranks, the first five are colored black, 6th, 7th, and 8th dan have alternating red and white panels (dandara), and for 9th, 10th dan and above, the belts are solid red. In judo's promotion system as originally finalized by Kan? around 1926 there was no maximal dan rank, and judoka holding 10th dan would normally wear a red belt, but also could wear a white belt, the same color as the lowest ky? rank. However, since the highest dan rank reached in judo for a living person or conferred posthumously remains 10th dan, any judo dan rank higher than 10th dan is now considered as a merely historical theoretical option. Some time after the death of Kan? the promotion system essentially became capped at 10th dan. Furthermore, holders of and dan rank above godan (5th dan) will often wear a plain black belt during regular training practice and outside any ceremonial duties.
Examination requirements vary depending on country, age group and of course the grade being attempted. The examination itself may include competition and kata. The ky? ranks are normally awarded by local instructors (sensei), but dan ranks are usually awarded only after an exam supervised by independent judges from a national judo association. For a rank to be recognized, it must be registered with the national judo organization or the K?d?kan.
Japan
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 ky? grades and at the elementary school level it is common to see a green belt for intermediate levels.
Europe
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 a red-white paneled belt, and judokas who have attained the 9th Dan may wear a solid red belt. In some countries a red belt is used between the white and yellow belts to signify full membership of the judo club or the countries judo association. More commonly the red belt is, however, reserved only for 9th and 10th Dan practitioners.
In some countries junior practitioners have an extra system in place to show the progress in between two ky? grades. The sub rank is symbolized by a small piece of fabric on the end of the belt. The colour of these are yellow, orange, green, blue or, brown. The piece added to the belt can never be of a lower or the same colour as the belt worn by the judoka, so an orange belt can't have a yellow piece, but it can have green, blue or, brown.
In other countries, such as Finland, junior sub ranks below a certain age are denoted by one to three red stripes on both ends of the belt. They are also used to signify that joint locks, chokes or strangles may not be performed upon the wearer as those as not taught nor applied to juniors below the age of 15 due to safety reasons.
Israel
In Israel the following belt colors exist:
Brazil
Brazilian belt rankings are normally white, blue, yellow, orange, green, purple, brown and black (6th, 7th, and 8th dan may wear alternating red and white panels, and 9th and 10th dan holders may wear solid red belts). Additionally, a grey belt may be given to very young judoka (under 11 or 13 years old) just before the blue. Sometimes, competitors are organized into two categories depending on grading; the first is from white to green, and the second is purple through black.
Canada
In Canada belt rankings for Seniors are, in ascending order: white, yellow, orange, green, blue, brown and finally black. Belt rankings for Juniors use, white, white-yellow, yellow, yellow-orange, orange, orange-green, green, green-blue, blue, blue-brown, and brown.
Australia
In Australia belt rankings for Seniors are, in ascending order: white, yellow, orange, green, blue, brown and finally black. Belt rankings for Juniors follow the same ranks and colours (up to and including brown), but have either 1, 2 or 3 white bars (depending upon age) at each end of the belt, as follows:
If the judoka is aged up to 10 (Mon), there are to be 3 white bars.
Between 10 and 13 (Yonen), there are 2 bars.
Finally, for 13 to 16 years of age (Shonen), there is a single bar.
Ireland
In Ireland the senior belt system is white, yellow, orange, green, blue, brown and black. A practitioner must be at least sixteen before being eligible to grade for blackbelt. For white, yellow, orange and green belt gradings are held in the practitioners club and are based on demonstration of a syllabus and kata. For promotion to blue and brown the judoka must compete at a national grading against players of their own rank and win at least two fights by ippon or wazari. To achieve black belt a judoka must earn 100 points i.e. 10 points for every ippon or waza-ari victory against a brown belt.
United States of America
In the US only senior players (usually those age 16 and over) are allowed to earn dan levels, signified by wearing a black belt. The USJF and USJA recognize dan grades awarded by the other organization. Advanced ky? levels can be earned by both seniors and juniors (children under the age of about 16) and are signified by wearing belts of various colours other than black. The order of belt colours can vary from d?j? to d?j?, depending on the d?j?'s organizational affiliation.
Seniors
For senior players, both the United States Judo Federation (USJF) and ) the United States Judo Association (USJA) specify six ky?, as listed in the table. The USJA requires "Beginners" (not a ky?) to wear a white belt until they test for yellow belt. The USJA also recommends wearing a patch specifying the practitioner's level. This is true for both ky? and dan levels.
Juniors
The USJF Juniors ranking system specifies ranks to 11th ky? (j?ichiky?). The USJA Juniors ranking system specifies twelve levels of ky? rank, beginning with "Junior 1st Degree" (equivalent to j?niky?, or 12th ky?) and ending with "Junior 12th Degree" (equivalent to ikky?). 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:
- Yellow belt converts to 6th ky? (rokky?)
- Orange belt converts to 5th ky? (goky?)
- Green belt converts to 4th ky? (yonky?)
- Blue belt or higher converts to 3rd ky? (sanky?)
Source of the article : Wikipedia
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