It is assumed that he wanted to view Kunikyo as Luoyang in Tan, and attempted to actualize Rushanabutsu (statue of Buddha) of Ryumon sekkutsu (stone cave) which was deeply connected to Luoyang in Shigaraki.
これは恭仁京を唐の洛陽に見立て、その洛陽と関係の深い龍門石窟の盧舎那仏を紫香楽の地で表現しようとしたものとみられる。