Mujitsu and Tairaku's Shakuhachi BBQ

You ask a questions like " How does one do muraiki ? "  And your teacher says ( after playing every day for a year and a ) here's how.  And it turns out you have to completely change you embouchure.    HAH!!! I love this stuff!  Am now starting over with the folk songs....
By the way this is not unique to shakuhachi, I have a friend who is a professional orchestral trombone player -- his instructor in college did the same thing to him after 9 years of playing.....