佐藤聰明 「太陽讃歌」 [Kojima / ALM Records, ALCD-11]
Japan’s La Monte Young, Takemitsu and Ichiyanagi contemporary, Sendoh Satoh’s "Solar Paean" for solo piano ( and echo) is now available on CD.
First LP issued in 1976 compiling works of the early ‘70’s exploring drone through tremolo technique and reverb on a label dedicated to avant-garde/ classical/ free-jazz… the best!!
For more info, q.v. http://www.zen-on.co.jp/cms/docs/satou.html