A hidden inn with detached rooms standing by the mysterious Nanataki, featuring a natural free-flowing spring
Kumamoto Oguni Town
"Oyado Hanabou" is a hot spring inn located right next to "Nanataki," a hidden gem in Minamioguni Town, Kumamoto Prefecture. Set across a vast site of about 5,000 tsubo, the property features detached guest rooms scattered throughout, and each room is equipped with a private hot spring bath, either indoors or open-air. The on-site natural spring water gushes up from the grounds and flows 100% free without any dilution or heating. Guests can fully enjoy this famous spring water in a variety of baths, including open-air baths that change with the seasons and a mysterious cave bath. Surrounded by forest bathing and plenty of natural ozone, you can spend a quiet moment that lets you forget everyday life.
TypeNatural Hot Spring
Natural spring water gushes up from the grounds. You can enjoy pure free-flowing hot spring water with no dilution or heating at all in every guest room bath and the large public bath. The water is known for its soft texture and warms the body from the core. Bathing in the open-air bath and cave bath while feeling the breath of nature brings exceptional relaxation.
Closed Days: Open all year
2805-3 Manganji, Minamioguni Town, Aso District, Kumamoto 869-2402
Gender Access
Gender Separated
Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.
Learn moreA hidden inn with detached rooms standing by the mysterious Nanataki, featuring a natural free-flowing spring
Kumamoto Oguni Town
"Oyado Hanabou" is a hot spring inn located right next to "Nanataki," a hidden gem in Minamioguni Town, Kumamoto Prefecture. Set across a vast site of about 5,000 tsubo, the property features detached guest rooms scattered throughout, and each room is equipped with a private hot spring bath, either indoors or open-air. The on-site natural spring water gushes up from the grounds and flows 100% free without any dilution or heating. Guests can fully enjoy this famous spring water in a variety of baths, including open-air baths that change with the seasons and a mysterious cave bath. Surrounded by forest bathing and plenty of natural ozone, you can spend a quiet moment that lets you forget everyday life.
TypeNatural Hot Spring
Natural spring water gushes up from the grounds. You can enjoy pure free-flowing hot spring water with no dilution or heating at all in every guest room bath and the large public bath. The water is known for its soft texture and warms the body from the core. Bathing in the open-air bath and cave bath while feeling the breath of nature brings exceptional relaxation.
Closed Days: Open all year
2805-3 Manganji, Minamioguni Town, Aso District, Kumamoto 869-2402
Gender Access
Gender Separated
Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.
Learn more