Re: ineffective technique from sensei?
I don't know if the sandan in question has a total of ten years of experience or was promoted ten years after nidan. I think he means the former. From what I've been told by others, rank comes more quickly in Japan than elsewhere, with university club members commonly going from no rank to nidan by graduation four years later. I also have been told that a student at Hombu can attend numerous classes each day as well. Ten years to sandan in AAA would be fairly quick, with most taking five to seven years to shodan and then a minimum of 48 months from shodan to sandan.