noun
ryosen scale; Japanese seven-tone gagaku scale
A traditional Japanese seven-tone scale used in gagaku, corresponding to the pitches so, la, ti, do, re, mi, fa and similar to the Western Mixolydian mode. Contrasted with 律旋 (ritsusen).
See also: 律旋
雅楽では呂旋と律旋という二つの音階が使われる。
In gagaku, two scales called ryosen and ritsusen are used.