He turned to so, which still had room for improvement, as opposed to jiuta, which had little room for dramatic development because it was already highly refined as a form of musical composition.
楽曲としての高度に発達を遂げて飛躍的な発展の余地が少ないと思われた地歌から、まだ発展の余地のある箏に眼を向けた。