Yunokawa Marine Spa
- Location
- Yunokawa, Hakodate, Hokkaido, Japan
- Water type
- sodium chloride
- Temperature
- 41 °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.
Yunokawa Marine Spa is located in the Yunokawa district of Hakodate, Hokkaido's historic southern gateway city, where the hot spring resort area sits beside Hakodate Bay offering views of the sea, the city skyline, and the iconic silhouette of Mount Hakodate — whose summit at night reveals one of Japan's three most celebrated night views, a glittering fan of city lights spread between two bays. Yunokawa Onsen is Hakodate's traditional resort district, established since the Meiji era and known for its sodium chloride springs that warm the body deeply against Hokkaido's brisk coastal climate. The marine spa here combines the restorative benefits of geothermal hot spring bathing with the refreshing sea air of Hakodate Bay, creating a distinctly Hokkaido coastal wellness experience in a city whose fascinating history spans the Ainu civilization, samurai-era Goryokaku fortress, and Japan's first Western-influenced port culture.