Sorry, coming in late to the thread but I wanted to contribute. If someone has been training for years, train on a very regular basis and has the technical ability to perform techniques common to senior Kyu grades, then why should they not be graded to BB? Your training starts in earnest at black belt and you start understanding what your techniques / kata / bunkai etc are and I am not saying that you should teach under 18’s some of the more sensitive aspects of martial arts. However by allowing them to attain the junior BB grade, you are just allowing them to be recognised for their skill level and to have the recognition within the club. They can then continue to hone their skills until they reach 18 and their real training can begin There must be an understanding that junior Dan grades do not have the same rank as an adult BB or standing within the club or martial art as they do not have the level of maturity. It should also be clear that I am not advocating teaching the application of certain techniques to minors or expecting them to have a full understanding of what they are doing but they should have the opportunity to put themselves in a position to do that once they are mature enough to continue their martial arts career. Kids are the future, if we do not train under 18’s to a high standard while they are young, not only will we lose some to other sports and interests, but these senseis of the future will never reach their potential and help carry on martial arts to the next generation. We need to allow the younger generation the opportunity to be the best that they can be and if we are not letting them progress to BB before 18 we risk losing people that could help martial arts progress in the years to come. There are many clubs out there that are only interested in generating revenue and throw black belts at people after a few years of training once or twice a week. It is vitally important that, when a junior is identified that has the skill, motivation, desire and discipline to train to BB level, we continue to train and develop them, allowing them to take the art forward in the right way and teach the next generation the values and discipline that martial arts has given us. p.s. Sorry for the long post