Juurigi Nagatake Onsen
Analysis UnverifiedThis hidden gem springs forth in Akiruno, a city in Tokyo blessed with abundant nature. Its most remarkable feature is its exceptionally high alkalinity, with a pH of 10.01, one of the highest in Japan. The water feels silky and lotion-like, and is traditionally associated with smoothing the skin. It is a gentle and soothing spring, perfect for those seeking to heal daily fatigue and refresh both mind and body.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
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 a high alkalinity over pH 10, this water can strip natural oils from the skin. Avoid long soaks and be sure to moisturize thoroughly with cream or lotion after bathing.
With its high alkalinity of pH 10.01 and 48.5 mg/kg of metasilicic acid, a component associated with beautiful skin, this onsen is ideal for those seeking silky skin. The viscous water gently exfoliates, promising a renewed texture after bathing. It's the perfect escape for a day of deep relaxation, leaving the city's hustle and bustle behind.
Due to its strong effect on the skin, individuals with sensitive skin or skin conditions should exercise caution. Avoid prolonged bathing.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Juurigi Nagatake Onsen
- Spring type
- Alkaline Simple Hot Spring
- Source temperature
- 25.9℃
- pH
- 10.01
- Flow rate
- 124 L/min
- Osmotic pressure
- Hypotonic
Analysis Document
- Analysis date
- 2023-09-29
- Analyst organization
- 環境保全株式会社
- Registration No.
- 20東京都温泉分析第3号
Cations
- Lithium ion Li⁺
- 0.40 mg/kg
- Sodium ion Na⁺
- 165 mg/kg
- Potassium ion K⁺
- 1.2 mg/kg
- Ammonium ion NH₄⁺
- 0.40 mg/kg
- Magnesium ion Mg²⁺
- 0.06 mg/kg
- Calcium ion Ca²⁺
- 1.9 mg/kg
- Aluminum ion Al³⁺
- 0.04 mg/kg
- Iron(II) ion Fe²⁺
- 0.02 mg/kg
- Strontium ion Sr²⁺
- 0.02 mg/kg
- Total cations
- 0.17 mg/kg
Anions
- Fluoride ion F⁻
- 3.0 mg/kg
- Chloride ion Cl⁻
- 112 mg/kg
- Hydroxide ion OH⁻
- 6.3 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.80 mg/kg
- Sulfate ion SO₄²⁻
- 2.1 mg/kg
- Carbonate ion CO₃²⁻
- 77.0 mg/kg
- Bromide ion Br⁻
- 0.30 mg/kg
- Iodide ion I⁻
- 0.20 mg/kg
- Nitrite ion NO₂⁻
- 0.20 mg/kg
- Nitrate ion NO₃⁻
- 6.5 mg/kg
- Hydrogen metasilicate HSiO₃⁻
- 48.5 mg/kg
- Metaborate ion BO₂⁻
- 13.1 mg/kg
- Total anions
- 0.27 mg/kg
Undissociated Components
- Total undissociated
- 0.00 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 0.00 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Totals
- Total dissolved substances
- 0.44 mg/kg
- Evaporation residue
- 0.37 mg/kg
Usage
- Heating
- No
- Dilution
- No
- 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
