@kotaro By the way, your critique of Western music is bang on because I think many people would agree that the idea of harmonic equivalence has held “Western” music back.

I have a collection of old enka on vinyl. Stuff from the 1940s-70s. And something that always impresses me about it is how singers allow themselves to hit notes that a lot of Western singers just wouldn’t because we haven’t trained our ears to do that.