Yunokuchi Onsen
Shingu, Wakayama Prefecture, Japan
- Location
- Shingu, Wakayama Prefecture, Japan
- Water type
- thermal
- Temperature
- 40 °C
- pH
- 7.3
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Balancing
LowHigh
Rich in trace elements — gentle on the skin.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesCalcium
Yunokuchi Onsen is located in Shingu, Wakayama Prefecture, a region known for its long-established network of hot springs. Thermal water reaches around 40 °C (104 °F), with an indoor bath, a rotenburo-style outdoor bath and a sauna.
Insider tip — Yunokuchi Onsen sits in the ancient Kumano pilgrimage region of the Kii Peninsula, where thermal waters have refreshed pilgrims walking sacred forest trails for over a millennium. The clear, mildly alkaline water is gentler than the iron-rich springs further north, prized for its skin-smoothing properties among local residents. The surrounding Nachi-Katsuura coastline — famous for Japan's tallest waterfall and deep-sea tuna fishing — gives this remote onsen an extraordinarily rich natural and cultural context. Soaking here after a day on the Kumano Kodo UNESCO pilgrimage route is considered an essential part of the spiritual journey.
Nearby
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 thermal water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).