Rank in Judo are ranked in ascending numerical order. The ninth ("kudan") and tenth degree black belt ("jūdan") and, theoretically, those higher, have no formal requirements. Only 15 individuals have been promoted to the rank of Kōdōkan 10th dan. On January 6, 2006, three individuals were promoted to this rank simultaneously: Daigo Toshirō, Ichirō Abe, and Ōsawa 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
Judo particularly from more powerful throws that uke lacks the skill to breakfall from. For these reasons, throws are normally taught in order of difficulty for both tori and uke. This is exemplified in the "Gokyo" , a traditional grouping of throws arranged in order of difficulty of ukemi. Those grouped in are relatively simple to breakfall from whereas those grouped in are difficult to breakfall from. A practitioner of judo is known as a . The modern meaning of "judoka" in English is a judo practitioner of any level of expertise, but traditionally those below the rank of 4th "dan"