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Inashiki Onsen Ibaraki

Inashiki, Ibaraki, Japan
Inashiki Onsen Ibaraki
Location
Inashiki, Ibaraki, 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

Inashiki, in the southern Ibaraki Prefecture along the Kasumigaura lake shore, is an agricultural community on the broad flat lowlands between Lake Kasumigaura — Japan's second-largest lake — and the Tone River border with Chiba, where traditional freshwater fishing, eel farming, and lotus root cultivation have sustained the lakeside communities for generations. Inashiki Onsen Ibaraki draws on sodium and bicarbonate thermal waters from the geological resources of the southern Ibaraki lacustrine plain, providing warm restorative baths in a lakeside agricultural community where the vast Kasumigaura shoreline, traditional eel cuisine, and flat cycling routes create an appealingly tranquil and watery spa setting. The Kasumigaura Lake cycling circuit — at 180 kilometres one of Japan's most celebrated lakeside cycling routes passing through traditional fishing villages and reed marshes — the fresh freshwater eel (unagi) cuisine of the lakeside restaurants, and the open water sailing and windsurfing culture of Japan's second-largest lake make Inashiki a pleasantly watery and active spa destination on the Kasumigaura shore.

Insider tip — Inashiki borders Lake Kasumigaura, Japan's second largest lake, and its onsen taps a bicarbonate spring from the lakeside alluvial plain. The smooth, alkaline water is especially popular with fishermen and lake-kayakers who stop to recover after long days on the water. The view toward the misty lake from the facility's upper deck creates a contemplative atmosphere unique among Ibaraki baths.
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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).