Since the mid Edo period, more and more, jiuta, so-kyoku, and kokyu-gaku tended to share the same songs for ensemble while each maintaining their own songs.
江戸時代中期以降、地歌、箏曲、胡弓楽はそれぞれ固有の曲も残しつつ、合奏のため同じ曲を共有する比率が高くなった。