There are 10 coloured belt (kyu) grades, being a standard and advanced kyu level in each of five colours. Those colours start at white belt (10th kyu) and advanced white belt (9th kyu) through blue, yellow, green then brown belts. Advanced brown belt is called 1st kyu. The next step is first degree black belt (“Shodan”) which is graded by invitation only. It generally takes at least 5 years of regular training to grade to Shodan.