Grade (bouldering) - Japanese Dankyu System

Japanese Dankyu System

Japan also has developed its own grading system widely used by the local climbers of the country, adopting the Dankyu (Dan and Kyu) system which resembles that of martial arts. It is also called the Soroban system, meaning grading system used in Japanese abacus schools. Like in martial arts, 1-Kyu is the hardest Kyu and it gets easier as the number ascends. 1-Kyu is the baseline grade represented by Captain Ahab in Ogawayama or Ninjagaeshi in Mitake, and is roughly equal to 6c+/7a in Fontainebleau grades or V5/V6 in Hueco scale. Kyu is open-ended on the easier side but practically the easiest problem could be around 10-Kyu. Dan starts from where kyu ends, Shodan (or 1-Dan) being the next grade higher than 1-Kyu, making it about 7a+/7b in Fontainebleau, V7/V8 in Hueco. Climbing a shodan problem means the climber has reached the advanced level. Dan gets harder as the number ascends, and is open-ended on the harder side. The Wheel of Life (V16/8C+) is graded at 6-Dan. A comparison between Fontainebleau and Dankyu bouldering grades suggests that 6 kyu is equivalent to 4a/4c Fontainebleau.

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