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| Grade | Minimum Delay | Minimum Age |
| 10th Kyu (jukyu) | ? | |
| 9th Kyu (kukyu) | ? | |
| 8th Kyu (hachikyu) | ? | |
| 7th Kyu (nanakyu) | ? | |
| 6th Kyu (rokyu) | ? | |
| 5th Kyu (gokyu) | ? | |
| 4th Kyu (yonkyu) | ? | |
| 3rd Kyu (sankyu) | ? | |
| 2nd Kyu (nikkyu) | ? | |
| 1st Kyu (ikkyu) | about 50 hours | 12 years |
| 1st Dan (shodan) | 3 Months or more after 1st Kyu | 14 years |
| 2nd Dan (nidan) | 1 year or more after 1st Dan | |
| 3rd Dan (sandan) | 2 years or more after 2nd Dan | |
| 4th Dan (yondan) | 3 years or more after 3rd Dan | |
| 5th Dan (godan) | 4 years or more after 4th Dan | |
| 6th Dan (rokudan) | 5 years or more after 5th Dan | |
| 7th Dan (nanadan) | 6 years or more after 6th Dan | |
| 8th Dan (hachidan) | 10 years or more after 7th Dan | 46 years |
| 9th Dan (kudan) | ? |