It is thought that Tsukushi goto (koto music from the Tsukushi area of Kyushu), one of sokyoku (koto music), has become obsolete, and when even its tone has been dismissed from people's minds, the koto which played the music of tsukushi goto transformed itself to a specter.
箏曲の箏曲筑紫箏がすたれ、その曲の音色すら人々の心から忘れ去られてしまったとき、筑紫箏を奏でる琴が変化して妖怪となったものとされる。