In 646, Emperor Kotoku who was enthroned through Isshi Coup (the Murder in the Year of Isshi) that occurred in the previous year proclaimed an imperial edict called Kaishin no Mikotonori as his new administrative policy.
646年（大化1）、前年の乙巳の変により即位した孝徳天皇は、新たな施政方針を改新の詔として示した。