Shimo Ootani Onsen
TypeNatural Hot Spring
An amber-colored cloudy hot spring rare even in Kyushu. Classified as a chloride and bicarbonate hot spring, it is also known for its skin-beautifying properties.
Amber-colored cloudy hot spring and groundwater-fed cold plunge bath
Kumamoto Kikuyo Town
Ootani no Yu is a natural hot spring facility proud of its amber-colored cloudy water pumped from 1,000 meters underground. The sauna room is a 90°C dry sauna, and a deep cold plunge bath using groundwater is available. There are also open-air baths and outdoor relaxation areas, providing an environment where you can relax both body and mind.
TypeNatural Hot Spring
An amber-colored cloudy hot spring rare even in Kyushu. Classified as a chloride and bicarbonate hot spring, it is also known for its skin-beautifying properties.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity10people
A convection-style stone dry sauna. The two-tiered layout provides solid heat and humidity, allowing for comfortable, thorough sweating.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity4people
A deep groundwater-fed cold plunge bath with a depth of about 80–110 cm. Its mellow water quality offers a refreshing cooldown.
Closed Days: Wednesday
3880-14 Harumizu, Kikuyo-machi, Kikuchi-gun, Kumamoto Prefecture 869-1102, Japan
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
Amber-colored cloudy hot spring and groundwater-fed cold plunge bath
Kumamoto Kikuyo Town
Ootani no Yu is a natural hot spring facility proud of its amber-colored cloudy water pumped from 1,000 meters underground. The sauna room is a 90°C dry sauna, and a deep cold plunge bath using groundwater is available. There are also open-air baths and outdoor relaxation areas, providing an environment where you can relax both body and mind.
TypeNatural Hot Spring
An amber-colored cloudy hot spring rare even in Kyushu. Classified as a chloride and bicarbonate hot spring, it is also known for its skin-beautifying properties.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity10people
A convection-style stone dry sauna. The two-tiered layout provides solid heat and humidity, allowing for comfortable, thorough sweating.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity4people
A deep groundwater-fed cold plunge bath with a depth of about 80–110 cm. Its mellow water quality offers a refreshing cooldown.
Closed Days: Wednesday
3880-14 Harumizu, Kikuyo-machi, Kikuchi-gun, Kumamoto Prefecture 869-1102, Japan
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