Iimoriyama Onsen Aizuwakamatsu
- Location
- Aizuwakamatsu, Fukushima Prefecture, Japan
- Water type
- sodium chloride
- Temperature
- 43 °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.
Iimoriyama Onsen is set in the historic city of Aizuwakamatsu in Fukushima Prefecture, renowned in Japanese history for the tragic last stand of the Byakkotai samurai youth during the Boshin War of 1868, whose memorial overlooks the city from the forested hill above. The chloride-rich thermal waters here carry sodium and mineral salts known to warm the body from within and promote muscle recovery, making these baths a restorative complement to the city's rich samurai heritage. Bathing in Iimoriyama Onsen is an immersion in both geothermal warmth and centuries of Japanese history, as the volcanic mineral springs have flowed through this culturally layered landscape for generations.