All right, Del, I finally listened to the "Pillow Book" soundtrack.
It's quite an amalgam of music. Unfortunately there are no liner notes to offer any details.
It starts with a number that sounds like it could have been played in Shanhai in the 20s or 30s. Then there's a lovely French song, very moody and new age. The same singer later does a French rap song. Yes, rap, but slow and gentle.
There is some Japanese pop-rock stuff. Then there's a few interesting Tibetan sacred pieces.
I'll have to see the film again to see how the music is incorporated.