Originally released in 1971 as a promo 7-inch and reissued here for the very first time, Rai Rai predates the formation of the now-celebrated Tohru Aizawa Quartet by several years. Before pianist Tohru Aizawa and brothers Tetsuya and Kyoichiro Morimura formed the group—whose 1975 private-press spiritual jazz LP Tachibana Vol. 1 has become a cornerstone of the J-Jazz canon - they were already venturing into bold, experimental territory.

Released on Liberty Records under the short-lived moniker Christal Zone, Rai Rai was written and arranged by koto player and composer Hideakira Sakurai. An almost unclassifiable hybrid of jazz, Japanese folk, Algerian raï, and free improvisation, the track is dominated by Sakurai’s visionary approach. Traditional Japanese instrumentation is blending into a dense polyrhythmic groove that evokes not only avant-garde jazz but also the raw street energy of Algerian raï - celebratory, unfiltered, and joyfully unrestrained.