No data directly indicating the audience hall's true appearance have survived. For the reconstruction, locations of the pillars were inferred through reference to the building's remains at Kuni-kyō, to where it had been relocated. For the upper part of the building, research was conducted on the main hall of Hōryū-ji, the eastern pagoda of Yakushi-ji, and other buildings that survived from the Nara period. The depiction of the Heian Palace audience hall depicted in the "Nenchu gyoji emaki" (Illustrated scroll of annual events and ceremonies) was also consulted.