"Chaharu" is a long-established inn located in the heart of the Dogo Onsen district in Matsuyama, Ehime Prefecture. It takes pride in having the first rooftop open-air bath in Dogo, where guests can enjoy Japan's oldest renowned hot spring while taking in spectacular views of Matsuyama Castle to the south and Mount Ishizuchi to the north. The alkaline simple hot spring water is gentle on the skin, and the smooth feeling after bathing is especially pleasant. At night, guests can spend a relaxing and open moment while gazing at the illuminated Matsuyama Castle and the starry sky. The space blends modern sensibilities with tradition, offering a refined and soothing retreat.