Re: O'Sensei teaching Aikido at the Hombu Dojo after WWII
In the classical music world, the way this is solved on cv's and biographical notes in program books and such is to say "x studied with y at the z conservatory and attended master classes with a, b, and c". Attending a master class with a good teacher can have a big influence on ones playing, so it's worth mentioning. But the teacher you study with week in week out for a number of years is who's lineage you're part of.
And of course at some point in a musician's career there comes a point where their teachers aren't necessarily mentioned at all anymore, because they've made enough of a name for themselves...