Kaminoyama Onsen Plus
- Location
- Kaminoyama, Yamagata, Japan
- Water type
- bicarbonate
- Temperature
- 40 °C
- pH
- 8
Water profile
Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Soft water — natural, classic buoyancy.
Kaminoyama Onsen is one of Yamagata Prefecture's most storied spa towns, with a history stretching back over five centuries and a literary legacy that includes a visit by the haiku master Matsuo Basho during his famous northern journey immortalized in Oku no Hosomichi. The town preserves castle ruins atop a hill above the hot spring district, while local breweries produce celebrated sake using the region's pure mountain water and premium Yamagata rice. The sodium-chloride thermal waters have long been prized for their warming properties, drawing generations of convalescents, travelers, and poets to this charming castle-town spa.