Judo ranking is a system of classifying judo practitioners according to their level of skill. The highest rank is 10th DAN, and the lowest rank is 1st kyu. The most common rank is the 3rd DAN, which is represented by the answer to the crossword puzzle, DAN. Judo ranking is based on a combination of technical ability, competitive success, and length of time practicing judo. It is an important part of the sport, as it allows practitioners to measure their progress and strive for higher levels of skill.