Bath
TypeNatural Hot Spring
A simple weakly alkaline hot spring rich in metasilicic acid, the soft water wraps the skin and is known as a beauty hot spring.
Anti-Aging Sauna and two natural cold plunge baths
Kumamoto Oguni Town
A bathing facility attached to Hizenya in Tsuetate Onsen, spanning Kumamoto and Oita prefectures. You can pursue beauty through a variety of hot springs and saunas while being soothed by views of primeval forest. The facility features what is said to be the world’s first Anti-Aging Sauna (a low-temperature far-infrared sauna). At around 50°C, it produces a gentle sweat similar to a bedrock spa. Cold plunge baths are available both indoors and outdoors, each using natural spring water with a clear, pleasant quality for cooling down.
TypeNatural Hot Spring
A simple weakly alkaline hot spring rich in metasilicic acid, the soft water wraps the skin and is known as a beauty hot spring.
Sauna TypeDry Sauna
Capacity20people
A low-temperature (around 50°C) far-infrared dry sauna. You lie on the tiled surface and perspire gently in a style similar to a bedrock spa. Recommended for those who are not comfortable with high temperatures.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity2people
An indoor cold plunge bath using natural spring water. The water is clear and transparent, offering a refreshing experience.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity6people
A spacious outdoor cold plunge bath. At a mild temperature, you can cool down slowly while hearing the babble of the Tsuetate River and feeling the natural breeze.
Closed Days: None
4223 Shimojo, Oguni Town, Aso District, Kumamoto 869-2503, 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
Anti-Aging Sauna and two natural cold plunge baths
Kumamoto Oguni Town
A bathing facility attached to Hizenya in Tsuetate Onsen, spanning Kumamoto and Oita prefectures. You can pursue beauty through a variety of hot springs and saunas while being soothed by views of primeval forest. The facility features what is said to be the world’s first Anti-Aging Sauna (a low-temperature far-infrared sauna). At around 50°C, it produces a gentle sweat similar to a bedrock spa. Cold plunge baths are available both indoors and outdoors, each using natural spring water with a clear, pleasant quality for cooling down.
TypeNatural Hot Spring
A simple weakly alkaline hot spring rich in metasilicic acid, the soft water wraps the skin and is known as a beauty hot spring.
Sauna TypeDry Sauna
Capacity20people
A low-temperature (around 50°C) far-infrared dry sauna. You lie on the tiled surface and perspire gently in a style similar to a bedrock spa. Recommended for those who are not comfortable with high temperatures.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity2people
An indoor cold plunge bath using natural spring water. The water is clear and transparent, offering a refreshing experience.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity6people
A spacious outdoor cold plunge bath. At a mild temperature, you can cool down slowly while hearing the babble of the Tsuetate River and feeling the natural breeze.
Closed Days: None
4223 Shimojo, Oguni Town, Aso District, Kumamoto 869-2503, 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