Mt. Senganzan with an altitude of 572 m is one of the Satoyama (woodlands) in the northern part of Oita Pref. Towering rocky cliffs and stone pillars stand from the mountainside to the summit, forming as many as 72 peaks. Different from the surrounding mountains, which are afforested in an orderly manner, this Yabakei-typed mountain consisted of tuff breccia attracts attention of visitors. It is said that a place consisted of strange rocks and bizarre stones was considered as a holy place in the ancient times, and so was Mt. Senganzan, where mountain practitioners trained themselves. At the foot of a towering rock cliff stands Okunoin (back temple) of Hoda Temple, which is 15 minutes’ walk down the hill. The Kannon statue is placed inside this small hall. There is a cave in the rocky cliff adjacent to Okunoin, where Gorin-to (five-ringed stupa) and Hoto (jeweled stupa) are placed. Along the approach to Okunoin stand a stone shrine gate (torii) and the statue of Nio (guardian deity) made in the time of Shinto/Buddhist syncretism.