Accordingly, the way of muck removal had been changed; it is confirmed that from the ninth century to the tenth century, purificatory asceticism was mainly applied, under the influence of Onmyodo (way of Yin and Yang; occult divination system based on the Taoist theory of the five elements), instead of former purification.
このため9世紀から10世紀にかけて、従来は祓いで済んでいたケガレ除去の方法が、陰陽道の影響もあり物忌み中心に変わってきていることが確認されている。