Hyotan Onsen

An onsen complex with a small outdoor chill zone and a cafe. They stamp your pass. There's a sand onsen, but you have to bury yourself. The sand area is divided into 5 options by temperature, and generally the deeper you dig the higher the temperature. As for the regular baths: - outdoor bath with stones; - indoor area: a stone bath, a bath in two circles (hot), a small square one; - outdoor area where water pours from pipes (like a waterfall from a pipe) and you can sit under the stream (this area looks great). There are two saunas, one is ultra-steamy where you literally can't see anything because of the steam. Water is clear, mostly no smell, medium temperature (except the round bath). I photographed the composition chart outside, but it might not be about the water in the onsen specifically. Lots of people, but the complex handles it easily and it doesn't feel crowded. Recommended.