A ranking system in Japanese martial arts representing student grades below black belt, typically numbered from 10th kyu (beginner) to 1st kyu (advanced student). Each kyu level represents progressively higher skill and knowledge.
From Japanese 'kyu' meaning 'class' or 'grade,' derived from the Go board game ranking system. Jigoro Kano adapted this concept for judo in 1883, creating the modern martial arts ranking system that spread to other disciplines.
The kyu system was revolutionary because it gave martial artists measurable goals and recognition for progress, something that didn't exist in traditional training where students simply practiced until the master deemed them ready. Interestingly, the colored belt system we know today wasn't part of the original kyu system—early practitioners just wore white belts that gradually darkened with use and sweat.
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