Therefore, students of the Onmyodo were limited to the descendents of the secular officials who had been in service since the outset of the Onmyoryo's establishment, and the training was conducted in closed environment,
その為、ほとんどが陰陽寮成立当初より存在する俗人官僚の子孫のみに履修生を限定し、閉鎖的に人材育成を行うことになる。