I have. While I looked at the various instruments - Koto and Shamisen in particular - I also listened to a lot of the music those are heavily used in. Possibly not the biggest scope, but it was amazing regardless. ^^
Discussion
I've noticed that it's difficult for me to follow the rhythm. They're working on some other plane.
That just makes it more interesting, tho.
Like some of the medieval music from Hildegard von Bingen, where it sounds melodic, but the rhythm is completely unfamiliar.