Tsuchiyu Onsen Mixed Spring (No. 2, 16, 17, 18)
Analysis UnverifiedThis mixed spring gathers several sources of Tsuchiyu Onsen, a village also known for its kokeshi dolls, into a single relay tank. Analyzed in 2017, it reaches 65°C at the tank and shows an alkaline pH of 8.55. Sodium at 112.8 mg/kg leads the cations, sulfate at 126.1 mg/kg and chloride at 75.0 mg/kg lead the anions, and metasilicic acid is generous at 158.6 mg/kg. A trace of hydrosulfide at 1.3 mg/kg adds a faint note to this gentle, honest water.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
A trace component with gentle antibacterial and anti-inflammatory action.
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
- Alkaline (pH)pH 8.55
- Feel
- Feels slippery and silky on the skin.
- Said to
- Said to remove old skin cells and excess sebum.
- Note
- Skin can dry out afterwards—moisturize after bathing.
- Metasilicic acid159 mg/kg
- Feel
- Your skin may feel smoother.
- Said to
- 50 mg/kg or more is said to mark a “skin-beautifying spring”; it is also used in skincare.
- Note
- The “skin-beautifying” label is a common rule of thumb, not a legal standard.
- Source temperature65℃
- Feel
- The source is 42°C or hotter; the bath may be on the hot side.
- Said to
- Heat is said to boost circulation and warm the body.
- Note
- Older people and those with high blood pressure or heart conditions should avoid baths of 42°C or more. Keep soaks short.
Effects are general descriptions based on the Ministry of the Environment’s indications by spring type, not a guarantee.
Scores are calculated from mineral analysis data based on the Mineral Spring Analysis Guidelines (Ministry of Environment, Japan). They are unrelated to facility atmosphere or service quality.
▸Note
The temperature, pH and component values shown here are based on the hot spring analysis (source). Actual values in the bath may differ depending on heating, dilution, recycling and filtration. Please check current usage status at the facility.
The alkaline pH 8.55 water softens old skin cells and leaves skin smooth, so moisturize afterward. The 65°C source is cooled for the baths; pour water over yourself first to adjust.
With an alkaline pH of 8.55 and 158.6 mg/kg of metasilicic acid, this water is traditionally loved for silky skin and moments of relaxation.
The 65°C source is hot, so check the bath temperature and avoid long soaks. Moisturize after bathing, avoid bathing on an empty stomach or after alcohol, and drink water before and after.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Tsuchiyu Onsen Mixed Spring (No. 2, 16, 17, 18)
- Spring type
- Alkaline Simple Hot Spring (Hypotonic - Alkaline - high-temperature hot spring)
- Source temperature
- 65℃
- pH
- 8.55
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2017-07-28
- Analyst organization
- 一般社団法人 福島県薬剤師会
- Registration No.
- 福島第1号
Cations
- Hydrogen ion H⁺
- 0.00 mg/kg
- Lithium ion Li⁺
- 0.00 mg/kg
- Sodium ion Na⁺
- 113 mg/kg
- Potassium ion K⁺
- 10.2 mg/kg
- Ammonium ion NH₄⁺
- 0.00 mg/kg
- Magnesium ion Mg²⁺
- 0.50 mg/kg
- Calcium ion Ca²⁺
- 11.2 mg/kg
- Aluminum ion Al³⁺
- 0.10 mg/kg
- Manganese ion Mn²⁺
- 0.00 mg/kg
- Iron(II) ion Fe²⁺
- 0.00 mg/kg
- Lead ion Pb²⁺
- < 0.005 mg/kg
- Copper ion Cu²⁺
- < 0.01 mg/kg
- Total cations
- 135 mg/kg
Anions
- Fluoride ion F⁻
- 3.0 mg/kg
- Chloride ion Cl⁻
- 75.0 mg/kg
- Hydroxide ion OH⁻
- 0.10 mg/kg
- Hydrogen sulfide ion HS⁻
- 1.3 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.30 mg/kg
- Sulfate ion SO₄²⁻
- 126 mg/kg
- Bicarbonate ion HCO₃⁻
- 33.0 mg/kg
- Carbonate ion CO₃²⁻
- 16.8 mg/kg
- Total anions
- 256 mg/kg
Undissociated Components
- Arsenious acid HAsO₂
- 0.90 mg/kg
- Metasilicic acid H₂SiO₃
- 159 mg/kg
- Metaboric acid HBO₂
- 22.6 mg/kg
- Total undissociated
- 182 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 0.00 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Totals
- Total dissolved substances
- 576 mg/kg
- Component total
- 576 mg/kg
- Evaporation residue
- 540 mg/kg
Usage
- Usage status
- Unknown
Indications & Contraindications
- Bathing indications
- Autonomic instability, Insomnia, Depression
- General indications
- High blood pressure (mild), Rheumatoid arthritis, Chronic pain or stiffness in muscles and joints, Muscle stiffness due to motor paralysis, Gastrointestinal dysfunction
- Contraindications
- Acute illness (especially with fever), Active tuberculosis, Malignant tumors, Severe heart disease, Respiratory failure, Renal failure, Bleeding disorders, Severe anemia, Any actively progressing illness, Pregnancy (especially early and late stages)
Drinking
- Drinkability
- Not drinkable
