Naegi Onsen
- Location
- Nakatsugawa, Gifu, Japan
- Water type
- thermal
- Temperature
- 40 °C
- pH
- 7.3
Water profile
Relaxing — deep, immediate muscle release.
Rich in trace elements — gentle on the skin.
Soft water — natural, classic buoyancy.
Naegi Onsen rises in the Naegi area of Nakatsugawa City, Gifu Prefecture—a historic area associated with the Naegi Castle, a mountain fortress whose stone walls and strategic highland position made it one of the Edo period's most dramatically situated castle complexes in the Kiso River highland region. Simple alkaline waters provide the gentle, skin-softening mineral soak that complements a visit to the castle ruins and the broader Nakatsugawa landscape, which combines the heritage of the Nakasendo highway post town with the geological interest of a region where volcanic activity has produced both the dramatic highland topography of the castle site and the thermal waters of the spring. The spring's castle district heritage gives it a particular historical resonance within Gifu's extraordinarily rich cultural landscape.