Throughout the Asuka area, there can be found many stone objects such as the Saruishi (Monkey Stones), Doso-jin (travelers' guardian deity) carved form stone and Tachibana-dera Temple's Nimen-ishi (Double-faced Stone), all of which are considered religious relics.
飛鳥各地に存在する猿石・道祖神石、橘寺の二面石などと呼ばれる石造物、宗教の遺物と考えられている。