Konan Onsen

Konan, Shiga, Kansai, Japan

Location: Konan, Shiga, Kansai, 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

Konan Onsen is located in the Konan area near Koga City, Shiga Prefecture, a region historically associated with the legendary ninja clans of the Koga school, rivals to the more famous Iga ninja of neighboring Mie Prefecture. The siliceous thermal waters here offer a soothing soak in a culturally rich landscape where ancient ninjutsu traditions are preserved in local museums and historic sites. Bathing at Konan Onsen provides a fascinating blend of relaxation and cultural discovery in one of the Kinki region's lesser-explored corners.

Insider tip — Konan Onsen is set in a valley town at the southern edge of Shiga Prefecture, surrounded by the ancient temple networks of the Koka region historically associated with ninja traditions. Bicarbonate spring water at 40°C draws local families seeking unpretentious baths away from Lake Biwa's tourist corridor. The area is rich in Edo-period merchant architecture, and several bathhouses adjoin traditional inns. Evening soaks are followed by firefly viewings along local streams during the June-July season.

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