From the middle of the seventh century to the early eighth century (possibly 724) the older stage I kanga, the following stage II kanga and Koriyama-haiji Temple at the second stage were operated.
7世紀中葉から8世紀前葉（おそらく724年）まで、より古いI期官衙、それに続くII期官衙、II期と同時期の郡山廃寺が営まれた。