Ookushi Onsen
- Location
- Omachi, Nagano (Northern Alps), Japan
- Water type
- silica
- Temperature
- 40 °C
- pH
- 7.2
Water profile
Relaxing — deep, immediate muscle release.
Rich in trace elements — gentle on the skin.
Soft water — natural, classic buoyancy.
Ookushi Onsen is located in Matsumoto City, Nagano Prefecture, the cultural capital of the Japanese Alps region and home to Matsumoto Castle — one of Japan's most magnificent original feudal castles, nicknamed "Crow Castle" (Karasu-jo) for its striking black lacquer exterior, and one of only twelve castles in Japan with an original (non-reconstructed) keep surviving from the feudal era. The siliceous thermal waters here serve a city of exceptional cultural richness, where the Matsumoto City Museum of Art houses works by Yayoi Kusama (Matsumoto's most famous native artist), the Saito Memorial Hall hosts world-class concerts, and the city's frame as the gateway to the Northern and Central Japanese Alps makes it one of the country's premier mountain tourism bases. Bathing at Ookushi Onsen in the shadow of the magnificent crow-black castle provides a quintessential Japanese cultural and wellness experience in one of Nagano's most artistically and historically distinguished cities.