The colour of the belt signifies the ‘grade’ or the experience of the player. Children under 8 follow the Kai system, and children over 8 use the Mon grade system for which they are awarded a certificate and a badge. Senior players are awarded Kyu and Dan grades.
Progression is based on ability, technique and knowledge of throws, holds (and some Japanese words).
the requirements for the Mons are detailed in the Mon Learning Programme pdf which is the Junior Syllabus, click here for more info.