Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
FerBicarbonatesManganèse
Takaramori Onsen, part of the Nakadomari-machi welfare center for the elderly (Aomori Prefecture), offers iron-rich water at 41°C, with an indoor bath, outdoor rotenburo and sauna.
Insider tip — The Takaramori Onsen welfare center in Nakadomari town provides iron-rich waters in a calm, community-focused setting designed to serve the well-being of elderly residents and local families alike. The tawny mineral water, drawn from a dedicated borehole, carries a subtle earthy fragrance and leaves the skin feeling refreshed and slightly toned. Community events and seasonal decorations give the facility a warm, festive atmosphere throughout the year. Visiting in the morning allows a peaceful soak before the afternoon crowds arrive.