Nukabira Gensenkyo Kosenchi No. 1
Analysis UnverifiedNukabira Gensenkyo began in the Taisho era when water hot enough to boil eggs was found deep in a primeval forest; the name is said to come from the Ainu word "Nukabira," a cliff shaped like a person. Kosenchi No. 1 flows naturally in the south district of the spa village, sustaining the free-flowing baths that the village's inns pledged together in their 2007 "Gensen Kakenagashi Declaration." Clear and nearly tasteless and odorless, the water is gentle on the skin and leaves a light, fresh feeling, suiting those who want to soak amid forest stillness, wild deer and starry skies.
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.
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 49.8°C source makes some tubs hot, so start in a cooler one, pour water over yourself first, and take breaks in the open-air bath, where the air temperature can differ sharply.
With 277.2 mg/kg of chloride, this water offers restorative warmth that lingers after bathing, while 274.6 mg/kg of bicarbonate is traditionally associated with silky skin on chilly, dry days.
The source is hot, so avoid long soaks and lightheadedness in hotter tubs; those with high blood pressure or heart concerns should keep baths short.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Nukabira Gensenkyo Kosenchi No. 1
- Spring type
- Sodium Chloride and Bicarbonate Hot Spring
- Old spring type name
- 含重曹－食塩泉
- Source temperature
- 49.8℃
- pH
- 7.8
- Flow rate
- 35 L/min
- Flow type
- 自然湧出
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2020-03-27
- Analyst organization
- 株式会社環境総合科学
- Registration No.
- 北海道第4号
Cations
- Sodium ion Na⁺
- 257 mg/kg
- Potassium ion K⁺
- 15.0 mg/kg
- Ammonium ion NH₄⁺
- 0.20 mg/kg
- Magnesium ion Mg²⁺
- 1.3 mg/kg
- Calcium ion Ca²⁺
- 46.4 mg/kg
- Aluminum ion Al³⁺
- 0.02 mg/kg
- Manganese ion Mn²⁺
- 0.10 mg/kg
- Iron(II) ion Fe²⁺
- 0.10 mg/kg
- Zinc ion Zn²⁺
- not detected
- Lead ion Pb²⁺
- not detected
- Copper ion Cu²⁺
- 0.00 mg/kg
- Cadmium ion Cd²⁺
- not detected
- Total cations
- 0.32 mg/kg
Anions
- Fluoride ion F⁻
- 3.0 mg/kg
- Chloride ion Cl⁻
- 277 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.00 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.00 mg/kg
- Sulfate ion SO₄²⁻
- 71.2 mg/kg
- Bicarbonate ion HCO₃⁻
- 275 mg/kg
- Carbonate ion CO₃²⁻
- 0.50 mg/kg
- Total anions
- 0.63 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 122 mg/kg
- Metaboric acid HBO₂
- 43.0 mg/kg
- Total undissociated
- 0.17 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 29.3 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.03 mg/kg
Totals
- Total dissolved substances
- 1.1 mg/kg
- Component total
- 1.1 mg/kg
- Evaporation residue
- 0.91 mg/kg
Usage
- Heating
- No
- Dilution
- Yes（館内掲示『温泉成分に影響を与える項目』：暑い時期は加水している（t2412 ブログ 2021/4/25撮影）。内湯には客が使う加水ホースもある。露天風呂は訪問時（2020/6・2021/4）源泉100%かけ流し。）
- Recycle / Filter
- No
- Additives
- No
- Disinfection
- No
Indications & Contraindications
- Bathing indications
- Cuts and grazes, Peripheral circulatory failure, Poor circulation, Depression, Xeroderma
- General indications
- High blood pressure (mild), Rheumatoid arthritis, Autonomic instability, Insomnia, 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
