Kuronagi Onsen
Analysis VerifiedKuronagi Onsen, a major source gushing from the Kuronagi River, a tributary of the Kurobe River, was discovered in 1645 by Tarozaemon of Otozawa Village. During the Edo period, it was renowned as a hidden hot spring of the Kaga Domain. Its colorless, transparent, and soft waters gently envelop the skin, warming the body to its core. After bathing, you feel surprisingly light, with a sense of rejuvenation from within. This blessed spring, whose waters are also delivered to Unazuki Onsen about 7 kilometers away, offers solace to those seeking to liberate mind and body amidst grand nature and rediscover their true self.
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 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.
▸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.
With the source reaching 98.3°C, pure water is added to adjust the temperature for a safe bath. Because it is a weakly alkaline simple spring, the water is gentle on the skin, allowing for longer, deeply warming soaks without easily causing bath fatigue.
Featuring a mild dissolved substance total of 542 mg/kg, this simple spring is perfectly safe for everyone from the elderly to those with sensitive skin. The 148 mg/kg of sodium ions gently envelop the body, making it ideal for those troubled by daily fatigue or poor circulation.
Please avoid bathing if you have a fever, severe heart or lung conditions, or advanced malignancies. The elderly and those with high blood pressure should avoid high-temperature baths.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Kuronagi Onsen
- Spring type
- 単純温泉（低張性・弱アルカリ性・高温泉）
- Source temperature
- 98.3℃
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2014-10-03
- Analyst organization
- 富山県衛生研究所
- Registration No.
- 富山-01
Cations
- Lithium ion Li⁺
- 0.62 mg/kg
- Sodium ion Na⁺
- 148 mg/kg
- Potassium ion K⁺
- 8.1 mg/kg
- Ammonium ion NH₄⁺
- 0.52 mg/kg
- Calcium ion Ca²⁺
- 10.5 mg/kg
- Aluminum ion Al³⁺
- 0.11 mg/kg
- Lead ion Pb²⁺
- 0.00 mg/kg
- Strontium ion Sr²⁺
- 0.21 mg/kg
- Copper ion Cu²⁺
- 0.00 mg/kg
- Total cations
- 0.17 mg/kg
Anions
- Fluoride ion F⁻
- 8.2 mg/kg
- Chloride ion Cl⁻
- 129 mg/kg
- Sulfate ion SO₄²⁻
- 33.2 mg/kg
- Bicarbonate ion HCO₃⁻
- 155 mg/kg
- Bromide ion Br⁻
- 0.38 mg/kg
- Hydrogen metasilicate HSiO₃⁻
- 1.0 mg/kg
- Metaborate ion BO₂⁻
- 0.50 mg/kg
- Total anions
- 0.33 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 39.8 mg/kg
- Metaboric acid HBO₂
- 6.6 mg/kg
- Total undissociated
- 0.05 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 11.9 mg/kg
- Total dissolved gas
- 0.01 mg/kg
Totals
- Total dissolved substances
- 0.54 mg/kg
- Component total
- 0.55 mg/kg
Usage
- Heating
- No
- Dilution
- Yes（Water is added because the source temperature is high.）
- Recycle / Filter
- No
- Additives
- No
- Disinfection
- No
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
