The Kokuchō Ato (site of the provincial office) dates back to the Nara and Heian periods and represents the remains of government offices from that era. The Hokkeji Bata Site was initially used as an administrative office and is believed to have been later repurposed as a provincial temple (Kokubun-ji). The Funioka Site is thought to have existed from the Nara to the Heian periods and may have served as a precursor to the provincial office or as a county office, later transitioning to a warehouse related to the provincial government. Today, both the Hokkeji Bata Site and the Kokubun-ji ruins have been developed into historical parks.