鉄Iron-bearing
An iron-bearing simple cold-mineral spring (14.4 C at the wellhead), heated for bathing in the classic cold-mineral fashion. Iron(II) at 21.6 mg/kg oxidizes on air contact, painting the bath the characteristic rust-red of an akayu (red-water) source. Light overall mineralization at 269 mg/kg, but the iron carries the entire experience — water arrives clear at the spout and stains the tub reddish-brown.
Good for
Recovery
Warmth and buoyancy lower stress markers and improve sleep; habitual bathing is linked to lower rates of depression.
fatigue, stress
Take care
Contraindications
- 急性疾患(特に熱のある場合)
- Severe anemia
- 高度の動脈硬化
- その他一般に病勢進行中の場合
Full composition
The bar is each ion's share of charge (mval%) within its group; over 20% names the spring. Gases, silica and trace metals are measured by mass only.
Cationsshare of charge (mval%)
- Iron (II)rusts brown in air; iron for anemia when drinkableFe²⁺21.6mgP96 national
- Calciumsettling and calming; can leave a white mineral bloomCa²⁺13.0mgP29 national
- Sodiumsalt's cation — pairs with chloride to make the water saltyNa⁺8.7mgP2 national
- Magnesiummild; a laxative if you drink itMg²⁺5.7mgP54 national
- Potassiumminor; matters for drinking limitsK⁺1.5mgP18 national
- Manganesetrace; companion to iron springsMn²⁺0.50mgP64 national
- Aluminumshows up in acidic volcanic waterAl³⁺0.30mgP67 national
Anionsshare of charge (mval%)
- Sulfate"gypsum / Glauber's salt" — vessels and wound healingSO₄²⁻110mgP56 national
- Chloridetable-salt anion — coats the skin and holds heat inCl⁻18.0mgP17 national
- Iodideyellows in air; helps blood lipidsI⁻2.7mgP90 national
Non-dissociatedmeasured by mass
- Metasilicic acidmetasilicic acid — a natural moisturizer for silky skinH₂SiO₃45.4mgP25 national
Dissolved gasesmeasured by mass
- Free carbon dioxidefizz — widens blood vessels (strong above 1000 mg/kg)CO₂41.8mgP65 national
Measured at the source
Source temperature
14.4°C
Cold mineral
Tonicity
0.27g/kg
Hypotonic
Free CO₂
42mg/kg
Low
On the certificate
- 神経痛
- Muscle pain
- Joint pain
- Chronic digestive disorders
- Hemorrhoids
- 月経障害