Higashi Shizuoka Tennen Onsen (Yunoki no Sato), in the city of Shizuoka, offers thermal water at 41°C, split between an indoor bath and an outdoor rotenburo, with a sauna.
Insider tip — Yunoki no Sato evokes a woodland village atmosphere within the city of Shizuoka. The facility uses naturally flowing thermal spring water and offers outdoor garden baths with views toward the forested hills east of the city.