In selection of junbo, it was selected from the lawful wife of the former emperor who was not the father of the emperor and unmarried imperial princesses who were the elder sisters or the aunts of the emperor.
准母の選定は、父帝ではない先帝の嫡妻か、天皇の姉ないし叔母にあたる未婚の内親王の中から選ばれた。