Its flat surfaces are shallow sexanglular and the decorations of gold and silver pictures and gold hyomon (type of lacquer ware) on roof and pillars are made in an ancient style as seen in the Shoso-in treasures, which show that this Zushi was made from the end of the Nara period to the beginning of the Heian period.
平面は奥行が浅い扁平六角形で、屋根、柱等に残る金銀泥絵や金平文（きんひょうもん）の装飾は正倉院宝物などに見られる古式の技法で、本厨子の制作が奈良時代末期～平安時代初期にまでさかのぼることを示す。