Niwakayama; Kobo Daishi Onsen
Fukuyama, Hiroshima, Japan
- Location
- Fukuyama, Hiroshima, Japan
- Water type
- sodium chloride
- Temperature
- 41 °C
- pH
- 7.3
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Restorative
LowHigh
Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Niwakayama / Kobo Daishi Onsen, in Fukuyama, Hiroshima Prefecture, taps sodium-chloride water at 41°C. An indoor bath, an outdoor rotenburo, and a sauna make up this bathhouse.
Insider tip — Kobo Daishi Onsen at Niwakayama honours the Buddhist saint Kukai (774-835), founder of Shingon Buddhism, who is traditionally credited with discovering or consecrating hundreds of hot springs across Japan during his wandering practice. Fukuyama Castle, reconstructed after World War II bombing, commands the Inland Sea horizon and remains one of the most imposing white-walled castle reconstructions in western Honshu.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 41 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sodium chloride water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.