Sekisui-ji Onsen

Sekisui-ji Onsen in Yamanashi Prefecture flows with siliceous and simple thermal waters in a prefectural landscape of dramatic geological contrasts, where the active volcanic cone of Mount Fuji on the western border, the Yatsugatake volcanic plateau to the north, and the Kofu Basin's agricultural flatlands together create a setting of unusual geological variety that produces thermal springs of considerable character within easy reach of Japan's most iconic natural landmark. The spring's dual mineral profile of siliceous and simple water produces the characteristically silky, skin-smoothing bathing experience associated with dissolved silica, offering visitors the cosmetically and physically distinctive mineral water that has made siliceous springs among the most appreciated in Japan's extensive thermal bathing repertoire. Sekisui-ji Onsen's siliceous mineral waters and its Yamanashi mountain setting invite visitors to experience the quieter, less internationally famous side of Yamanashi's thermal heritage, away from the better-known resort areas, in a setting where the volcanic geological inheritance of a Mount Fuji-adjacent prefecture produces mineral spring water of genuine quality and natural distinction.