The Konin-Kyaku-Shiki Act was codified by FUJIWARA no Fuyutsugu by order of the Emperor Saga, the Jogan-Kyaku-Shiki Act was codified by FUJIWARA no Ujimune by order of the Emperor Seiwa and the Engi-Kyaku-Shiki Act was codified by FUJIWARA no Tokihira by order of Emperor Daigo.
弘仁格式は嵯峨天皇が藤原冬嗣に、貞観格式は清和天皇が藤原氏宗に、延喜格式は醍醐天皇が藤原時平に、それぞれ命じて編纂させたものである。