It was opened by Kobo Daishi 6 in the Konin era (815), iron rust colored boiling water qushes out from the ravine of the inner part which is about two kilometer from the place where we are now, and it is said that the hot water is specially good for all illness. Taishi, when he traveled on foot, thought that this place was deeply related to Yakushi Nyorai, he carved Yakushi Nyorai, and made it the principal image, built the building of the temple, named it Onsenzan Anrakuji temple, made it the sixth sacred place. The temple which was communed because hot spring gushed had burned down by the fire of war of chosogabe army for the Manji era (1568-60), but after that it was rebuilt by same the Chosogabe at the present place. After that hot spring hat dried up without their knowledge.

If you go through the main gate of a buddhist temple (the gate of the bell tower), there is the fine reinforced concrete main temple. The main temple was destroyed by a fire 32 in the Showa era, but after that is was rebuilt by the effort of the chief priest, so it was changed to the noninflammable building. There is brilliant coloring Manreido next the main temple, Taishido at the right hand side is the one remained unburned, and it is said that it was built 4 in the Manji era (1661). Hojyo (the temple for guest) at the side of Taishido is roofing with thatch, it has a ventilator unchanged since olden times, There is the old tree named "Sakamatsu" -an inverted pine tree-at the front of the main temple, according to legend Taish was aimed at the target of the arrow of a hunter through his fault for the training, but the pine. tree received the arrow and he was saved. The hunter took Taishi for a wounded wild boar, and it is said that Taishi thought that he missed being killed by a hairbreadth by divine help of getting hold of Buddha's teaching, he made the hunter dig up the pine tree, plant it upside down, and it took root.