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Kasuya Onsen

Kasuya, Fukuoka, Japan
Kasuya Onsen
Location
Kasuya, Fukuoka, Japan
Water type
sodium chloride
Temperature
42 °C
pH
7.3

Water profile

Thermicity
Sedative
42 °C
LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation
Restorative
LowHigh

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

Buoyancy
Effortless float
LowHigh

Dense, salty water — you float without effort.

SodiumChloruresBrome

Kasuya Onsen is located in Kasuya, a suburban town in the southeastern corner of Fukuoka Prefecture between Fukuoka City and the scenic Genkai Quasi-National Park coastline, positioned within the metropolitan commuter zone of one of Japan's most economically dynamic cities while maintaining the character of a residential community rooted in agriculture and local commerce. The town sits close to Dazaifu, one of the most historically significant sites in northern Kyushu — the former seat of the Dazaifu government that administered Kyushu and Japan's diplomatic relations with China and Korea during the Nara and Heian periods, and home to Dazaifu Tenmangu Shrine, one of Japan's most important shrines dedicated to the scholar-deity Sugawara no Michizane. The onsen at Kasuya draw on silica-rich geothermal waters from the volcanic geology of the northern Kyushu region, providing mineral bathing in a community that enjoys the proximity of Fukuoka's urban energy while maintaining the quieter rhythms of a Fukuoka suburban town.

Insider tip — Kasuya is a suburban district east of Fukuoka City, where accessible community onsen serve the metropolitan population seeking weekend relaxation. The sodium-chloride springs at 42°C are characteristic of Fukuoka's buried sedimentary basin, yielding mildly salty, warming waters. The area blends residential neighborhoods with green corridors linking to the Munakata Taisha Grand Shrines, a UNESCO World Heritage site. A convenient and popular local bath just minutes from Fukuoka's urban core.
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Frequently asked questions

How hot is the water?
The water runs quite hot here, around 42 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sodium chloride water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).