Minamiaso Onsen

Minamiaso, Kumamoto Prefecture, Japan

Location: Minamiaso, Kumamoto Prefecture, Japan
Water type: sulfurous
Temperature: 44 °C
pH: 6.5

Water profile

Thermicity

Sedative

44 °C

LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation

Bio-active

LowHigh

Rich in active gases or metals — a strong mineral character.

Buoyancy

Standard buoyancy

LowHigh

Soft water — natural, classic buoyancy.

SoufreSulfuresSulfates

Aso-Shimodajyō Station is a railway station on the Minamiaso Railway Takamori Line in Minamiaso Village, Aso District, Kumamoto Prefecture, Japan. The station's former name when written in kana has 16 characters, making it the fifth longest station name in Japan, along with Yanagawa Kibōnomori Kōen-mae Station on the Abukuma Express Line. The station was renamed to Aso-Shimodajyō Station in July 2023, as the hot spring facilities at the station were shut down.

Insider tip — Minamiaso Onsen lines the southern slope of the Aso caldera in a valley famous for its pure spring water, clear skies, and direct views of the outer caldera rim. Sulfurous waters rising from the Aso volcanic system deliver a milky white tinge and strong geothermal heat prized for circulatory and skin benefits. The 2016 Kumamoto earthquakes temporarily disrupted many springs here, but most facilities have since recovered and reopened. Evening soaks in the rotenburo with fireflies over the rice paddies below represent quintessential Kyushu summer bathing.

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