masashi heirakuji designed the sound for this installation.
[information in japanese @ ycam]
http://www.ycam.jp/art/2011/03/-reacting-space-for-dividual-b.html
[information in english web @ ycam]
http://www.ycam.jp/en/art/2011/01/-reacting-space-for-dividual-b.html