Thanks for the info, Yas. It's important to me not only as a martial artist, but also as a social studies teacher. I had come across the "compulsory" reference at some point, likely last year, in an online article about black belts. When I double-checked what you'd said, nothing online came up about compulsory JJ in Japan. No worries. As I said some schools may indeed have it together with kyudo,kendo,judo whatever school may have to offer. But it all depends on a particular school and teacher and will last a few classes and is unlikely to have any lasting effect on students. I haven't become a dancer after all.