Kongo Sakuseisui (Unazuki Onsen Dai 1, 3, 4, 5, 6, 7, 9, 11-goi, Hakufunsen)
Analysis VerifiedDrawn from multiple naturally gushing wells in the Kuronagi area, this mixed source produces 2,100 liters per minute deep within the Kurobe Gorge. Piped roughly seven kilometers downstream since 1923, the exceptionally clear waters are broadly distributed to inns and bathhouses throughout the Unazuki Onsen town, carrying the historical legacy of local power development.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
A trace component with gentle antibacterial and anti-inflammatory action.
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.
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.
Because the source exceeds 90°C, temperatures are carefully adjusted at each facility. Begin with brief 3-to-10-minute dips. Since the mildly alkaline water is remarkably gentle on the skin, avoid rinsing off with tap water afterward to let the minerals absorb naturally.
The mildly alkaline water (pH 7.83) gently clears away dead skin cells, while 151 mg/kg of metasilicic acid provides natural hydration. Enhanced by a faint hint of hydrogen sulfide, it deeply warms the body to soothe poor circulation, fatigue, and chronic muscle stiffness.
Avoid bathing if you have acute illnesses, active tuberculosis, severe heart conditions, or severe anemia. Refrain from soaking immediately before or after meals, or after consuming alcohol.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- 混合さく井水（宇奈月温泉 第1、3、4、5、6、7、9、11号井、白噴泉）
- Spring type
- 単純温泉
- Source temperature
- 90.8℃
- pH
- 7.83
- Flow rate
- 2,100 L/min
- Flow type
- 自噴
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 1996-08-30
- Analyst organization
- 富山県衛生研究所
- Registration No.
- 衛研 第136号
Cations
- Lithium ion Li⁺
- 0.60 mg/kg
- Sodium ion Na⁺
- 135 mg/kg
- Potassium ion K⁺
- 6.0 mg/kg
- Magnesium ion Mg²⁺
- 0.23 mg/kg
- Calcium ion Ca²⁺
- 12.2 mg/kg
- Manganese ion Mn²⁺
- 0.03 mg/kg
- Iron(II) ion Fe²⁺
- 0.03 mg/kg
- Total cations
- 0.15 mg/kg
Anions
- Fluoride ion F⁻
- 8.1 mg/kg
- Chloride ion Cl⁻
- 106 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.21 mg/kg
- Sulfate ion SO₄²⁻
- 33.9 mg/kg
- Bicarbonate ion HCO₃⁻
- 156 mg/kg
- Bromide ion Br⁻
- 0.40 mg/kg
- Total anions
- 0.30 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 151 mg/kg
- Metaboric acid HBO₂
- 6.5 mg/kg
- Total undissociated
- 0.16 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 3.9 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Totals
- Total dissolved substances
- 0.61 mg/kg
- Component total
- 0.62 mg/kg
- Evaporation residue
- 0.51 mg/kg
Usage
- Heating
- No
- Dilution
- No
- Recycle / Filter
- No
- Additives
- No
- Disinfection
- No
Indications & Contraindications
- Bathing indications
- Neuralgia, muscle pain, joint pain, frozen shoulder, motor paralysis, joint stiffness, bruises, sprains, chronic digestive diseases, hemorrhoids, poor circulation, convalescence, fatigue recovery, health promotion
- Contraindications
- Acute illnesses (especially with fever), active tuberculosis, malignant tumors, severe heart disease, respiratory failure, renal failure, hemorrhagic diseases, severe anemia, other generally progressive diseases, pregnancy (especially early and late stages)
Drinking
- Drinkability
- Not drinkable
