Tsuyama Castle Onsen
- Location
- Tsuyama, Okayama, Japan
- Water type
- sodium chloride
- Temperature
- 42 °C
- pH
- 7.3
Water profile
Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Dense, salty water — you float without effort.
Tsuyama Castle Onsen is a hot spring facility in Tsuyama, a castle city in northern Okayama Prefecture, Japan, dominated by the magnificent ruins of Tsuyama Castle — nicknamed the 'Cloud Castle' (Kakuzan-jo) for its dramatic position atop a forested hill above the Yoshii River, and recognized as one of Japan's top three castle ruins for the beauty of its extensive remaining stone walls. The naturally chloride-sodium spring waters here provide a warming, saline mineral soak valued for circulation improvement and skin nourishment, offering visitors exploring the castle ruins and the atmospheric historical districts of this Mimasaka-region castle town a restorative thermal experience. Combining the dramatic stone wall aesthetics of one of Japan's most beautiful castle ruins, the Yoshii River scenery, and the comfortable mineral wellness of natural saline hot spring bathing, Tsuyama Castle Onsen provides a historically evocative and therapeutically satisfying Okayama thermal destination.