Day use onsen facility in the Yu no Go onsen village. Very nice spring water just on the verge of being awesome, but not quite there. Baths are very well designed and made with various materials that feel good on your feet and just lounging in. No straight spring water bath here, but there is a small fountain where you can drink some of the water. Outdoor area is skinny, but well designed with some real plants.
Family baths also available.