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Yamae Onsen

Yamae, Kumamoto Prefecture, Japan
Yamae Onsen
Location
Yamae, Kumamoto Prefecture, Japan
Water type
bicarbonate
Temperature
40 °C
pH
8

Water profile

Thermicity
Sedative
40 °C
LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation
Restorative
LowHigh

Loaded with major ions — the essential minerals (Ca, Mg).

Buoyancy
Standard buoyancy
LowHigh

Soft water — natural, classic buoyancy.

BicarbonatesSodiumCalcium

Yamae Onsen is located in Yamae, a small village community in the Kuma district of southern Kumamoto Prefecture in the deep river valleys of the Ichifusa mountain range, a landscape of traditional forestry, terraced agriculture, and clear mountain streams that flows into the upper Kuma River system. The village preserves elements of the traditional Kuma culture of this mountain region, including forestry management practices developed over centuries to work with the steep terrain and the rhythms of the Kuma watershed's seasonal flooding and drought cycles. The surrounding Ichifusa mountain area offers exceptional hiking in a forest landscape of cryptomeria cedars and native broadleaf trees, with views from the ridge crests extending across the Kyushu mountain interior to the distant volcanic peaks of Aso and Kirishima on clear days. The onsen here draw on silica-rich thermal springs from the geothermal activity underlying this volcanic highland zone, providing mineral bathing in an authentically remote Kyushu mountain setting where the slow pace of mountain community life offers a profound counterpoint to urban Japan.

Insider tip — Yamae Onsen is a small village spring in the deeply forested Kuma district, where bicarbonate water rises at a gentle temperature through metamorphic basement rock. The village is one of the most remote inhabited areas of Kyushu, surrounded by cedar forests managed under traditional selective-harvest practices. The bath facility here is often a simple communal tub house, preserving a form of rural onsen culture largely unchanged since the Meiji era. Silence, clear air, and the sound of the Kuma River rushing below make this one of the most meditative bathing experiences in southern Japan.
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Frequently asked questions

How hot is the water?
The water runs quite hot here, around 40 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features bicarbonate water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).