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Aichi Kira Onsen

Kira, Aichi, Japan
Aichi Kira Onsen
Location
Kira, Aichi, 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

Nishio, in the southwestern Aichi Prefecture on the Yahagi River delta approaches toward Mikawa Bay, is Japan's most celebrated matcha green tea producing city, the Nishio matcha whose deep flavour, vivid green colour, and fine texture have made it the preferred tea for tea ceremony (chado) and confectionery since the thirteenth century when the Jishoji Temple tradition of shaded cultivation established the premium quality standards still maintained by Nishio matcha farmers today. Aichi Kira Onsen, in the Nishio area, draws on sodium and bicarbonate thermal waters from the geological resources of the southwestern Aichi bay coastal zone, providing restorative baths in the heart of Japan's matcha capital where the green tea gardens, the Nishio City Matcha Museum, and the extraordinary Yahagi River delta landscape create a flavourful and historically distinguished spa setting. The Nishio City Matcha Museum and tea garden walks through the shaded matcha cultivation fields, the Kira Yoshida Shrine commemorating the pivotal moment in the Forty-Seven Ronin's revenge story, and the Mikawa Bay coastline cycling routes through the traditional Aichi coastal landscape make the Nishio area an outstandingly distinctive cultural and culinary spa destination in southwestern Aichi Prefecture.

Insider tip — Kira occupies the eastern shore of the Chita Peninsula where the land meets Mikawa Bay, and its onsen draws bicarbonate water with a gentle mineral profile suited to long, relaxing soaks. The area is historically associated with the Kira clan of the Chushingura samurai legend. Combine a soak with a visit to the local Kira Yoshio memorial shrine for a culturally rich half-day.
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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).