Semboku Onsen
- Location
- Semboku, Akita, 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.
Semboku Onsen serves the Semboku City area in southeastern Akita Prefecture, home to Lake Tazawa, Japan's deepest lake at 423 meters, whose vivid cobalt-blue waters have been celebrated in legend since the myth of the beautiful Tatsuko, who drank a sacred spring dry and was transformed into the lake's guardian dragon deity, her golden statue now standing on the shoreline. The city also encompasses Dakigaeri Gorge, a breathtaking ravine of turquoise pools and cascading waterfalls carved through ancient rock, as well as the gateway to the Tamagawa Onsen thermal field, one of Japan's most distinctive spring landscapes. The mineral-rich waters of Semboku's onsen offer restorative bathing in a landscape of extraordinary natural diversity and mythological depth.