向井千恵 (Chie Mukai) - Kokyu Improvisation (1990) 

1. Kokyu Improvisation 00:00
Chie Mukai is a japanese musician best know for her involment in improv group Ché-SHIZU. Here she plays the kyoku, voice, pieces of metal, metal board, mirror, bronze rings, cymbals, tape-soundscape at home.
The liner notes indicate 3 tracks, though it's not divided so it's only one file.