Kyu Joten Onsen

Kariya, Aichi, Japan

Location: Kariya, Aichi, Japan
Water type: sodium chloride, thermal
Temperature: 37 °C
pH: 7.3

Water profile

Thermicity

Neutral

37 °C

LowHigh

Soothing — neither hot nor cold, perfect balance.

Mineralisation

Restorative

LowHigh

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

Buoyancy

Effortless float

LowHigh

Dense, salty water — you float without effort.

SodiumChloruresBrome

Kyu Joten Onsen, in Kariya, Aichi Prefecture, offers sodium-chloride thermal water at around 37°C (99°F), spread across an indoor bath, an outdoor rotenburo and a sauna.

Insider tip — A neighbourhood onsen in Kariya, Aichi — the heartland of Toyota's manufacturing empire. Deep artesian wells in this area occasionally yield warm, sodium-rich waters. 'Kyu Joten' suggests historical origins; a working-class bath tradition serving the city's industrial community.

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Frequently asked questions

How hot is the water?

The water is neutral here, around 37 °C — a perfect balance, neither too hot nor too cold.

What type of water is found here?

This spot features sodium chloride & thermal water.

What is the best season to visit?

The most favourable period for this spot is: Toute l'année.