Masutatsu Ōyama 大山倍達 Kyokushinkai Karate - Kyokushin Grading Kyokushin Grading Colored belts have their origin in Judo, as does the training 'gi', or more correctly in Japanese, 'dōgi' or 'Keikogi'. In Kyokushin
Judo Belt - Black Tip | Martial Arts | SMAI
Ranks and Promotion
Judo Belts (Ranking system) | Judo
Kyu - British Judo
Rank in judo - Wikipedia
Judo Blog: Panel Belt Secrets - Black Belt Magazine
ASJJF - Rules
How many belts of color can you earn in Judo? - Quora
Judo Belts & Gradings – Judokaa Martial Arts
grading - FORD JUDO CLUB
The brief history of the coloured belts and ranking systems in Judo and BJJ - YouTube
CHERUBIN JIU JITSU ACADEMY: Jiu Jitsu and Judo belt systems