Hirota Onsen
Kashiwazaki, Niigata, Japan
- Location
- Kashiwazaki, Niigata, Japan
- Water type
- thermal
- Temperature
- 38 °C
- pH
- 7.3
Water profile
Thermicity
Neutral
LowHigh
Soothing — neither hot nor cold, perfect balance.
Mineralisation
Balancing
LowHigh
Rich in trace elements — gentle on the skin.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesCalcium
Hirota Onsen is a simple hot spring in Japan, offering the gentle, clear alkaline waters that form the foundation of the country's enduring onsen culture. Simple springs, known in Japanese balneology as tanjun-sen, are celebrated for their mild yet effective properties—improving circulation, easing muscle fatigue, and soothing the nervous system without harsh mineral intensity. This quietly welcoming spring provides the quintessential Japanese bath experience: unhurried, contemplative, and restorative.
Insider tip — Hirota Onsen in the Niigata highlands near Kashiwazaki lies in the hills behind the Sea of Japan coast, in a region of rice farming and the dramatic coastline of central Niigata. The mild springs serve a landscape between the mountains and the sea, where the snow country of the Echigo region meets the Japan Sea coast, and where the onsen tradition offers warmth in a prefecture renowned for its rice, sake, and the heavy winter snows that blanket the countryside.
Nearby
Frequently asked questions
How hot is the water?
The water is neutral here, around 38 °C — a perfect balance, neither too hot nor too cold.
What type of water is found here?
This spot features thermal water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.