The water at Hirayama Onsen is an alkaline simple sulfur spring known as the "beauty hot springs." The warm, slippery, and soft water is like a cosmetic beauty serum, leaving your skin feeling moist even after getting out of the bath. While it's nice to stay at a hot spring inn of your choice and enjoy it at your leisure, there are also easy-to-access hot springs where you can stop by and enjoy a soak on your travels.
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