Located within the Joshinetsu Kogen National Park, the one-member inn of Hoyuyu, which springs up in the mountains at an altitude of 800m. At the stop-in, Hoshino-yu, which is a mixed-bath, and Rōshino-yu, which is exclusively for women, are available, and there is also a plan with lunch. The specialty Hōshino-yu, whose hot springs naturally spring from the bottom of the Yūfune, is also designated as a national registered tangible cultural property. It is located in a wooden structure in the style of a ryokan, and the nostalgic atmosphere of the deer-yōkan style of the Meiji period is popular.