Regarding Kozen-do Temple, ruins of the temple were confirmed by an excavation of the site on the mountain ridge near the source of Saho-gawa River in 1966, and tiles which date back to the time of the construction of the Great Buddha of Todai-ji Temple were unearthed there.
香山堂については、1966年の発掘で佐保川の水源地付近の尾根上に寺院跡が確認され、東大寺大仏造立にさかのぼる時期の瓦が出土している。