Aishi Oyauchi is a free improvising alto saxophonist in the tradition of Kaoru Abe and who hails from the same first generation of Japanese free improvisers from the 1960s; this album finds him performing on alto and soprano sax at Performing Art Center, using space and abrupt diversions alongside unusual tone and technique with percussive asides.

Under-recorded but legendary Japanese free improvising saxophonist Aishi Oyauchi in a double CD, performing on alto saxophone, soprano saxophone, and piano through 52 untitled and inventive pieces, from a few seconds in length to several minutes, presented as 7 composite tracks; part of the Armageddon Nova Series exploring radical free improvisation.