Fresh Land Nishitama Yotsuba-no-yu
Analysis UnverifiedA soothing gift from the earth, bubbling up in the Musashino area. While its history is relatively new, it has become a beloved relaxation spot for locals. The high alkalinity of pH 9.0 creates a silky texture that gently envelops your skin, leaving it feeling incredibly smooth after your bath. Soaking slowly in the lukewarm water will release you from daily stress, allowing your mind and body to find a gentle balance. It's perfect for nights when you're troubled by autonomic imbalance or insomnia, or whenever you seek deep relaxation.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
Undissociated boric acid with antibacterial action that keeps the skin surface clean.
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 water is a mild 36.3°C, so a long, relaxing soak of 15-20 minutes is recommended. To maximize the skin-smoothing benefits of its high alkalinity, avoid rinsing off with fresh water after your bath and gently pat your skin dry with a towel.
Characterized by its high alkalinity of pH 9.0, this hot spring is traditionally associated with creating silky skin by gently dissolving old keratin. The mild 36.3°C water is gentle on the heart and promotes parasympathetic nerve activity. It may support those with autonomic imbalances, insomnia, or stress-related symptoms, offering a path to deep relaxation.
Avoid bathing during active phases of illness, when extremely weak, or after consuming alcohol. Be sure to hydrate before entering the water.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Fresh Land Nishitama Yotsuba-no-yu
- Spring type
- Alkaline Simple Hot Spring
- Source temperature
- 36.3℃
- pH
- 9
- Flow rate
- 140 L/min
- Flow type
- Pumped
- Osmotic pressure
- Hypotonic
Analysis Document
- Analysis date
- 2022-06-13
- Valid until
- 2025-10-03
- Analyst organization
- ケー・エス環境研究所株式会社
- Registration No.
- (3東京都温泉分析第5号)
Cations
- Hydrogen ion H⁺
- 0.00 mg/kg
- Sodium ion Na⁺
- 143 mg/kg
- Potassium ion K⁺
- 3.2 mg/kg
- Ammonium ion NH₄⁺
- 0.40 mg/kg
- Magnesium ion Mg²⁺
- 0.70 mg/kg
- Calcium ion Ca²⁺
- 3.2 mg/kg
- Aluminum ion Al³⁺
- 1.9 mg/kg
- Manganese ion Mn²⁺
- 0.00 mg/kg
- Iron(II) ion Fe²⁺
- 1.3 mg/kg
- Iron(III) ion Fe³⁺
- 2.1 mg/kg
- Zinc ion Zn²⁺
- 0.01 mg/kg
- Lead ion Pb²⁺
- 0.00 mg/kg
- Copper ion Cu²⁺
- 0.00 mg/kg
- Cadmium ion Cd²⁺
- 0.00 mg/kg
- Total cations
- 0.16 mg/kg
Anions
- Fluoride ion F⁻
- 5.2 mg/kg
- Chloride ion Cl⁻
- 136 mg/kg
- Hydroxide ion OH⁻
- 0.20 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.00 mg/kg
- Sulfate ion SO₄²⁻
- 2.0 mg/kg
- Bicarbonate ion HCO₃⁻
- 133 mg/kg
- Carbonate ion CO₃²⁻
- 10.1 mg/kg
- Hydrogen sulfate HSO₄⁻
- 0.00 mg/kg
- Arsenite ion AsO₂⁻
- 0.00 mg/kg
- Sulfide ion S²⁻
- 0.00 mg/kg
- Total anions
- 0.29 mg/kg
Undissociated Components
- Sulfuric acid H₂SO₄
- 0.00 mg/kg
- Metasilicic acid H₂SiO₃
- 30.1 mg/kg
- Metaboric acid HBO₂
- 58.9 mg/kg
- Total undissociated
- 0.09 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 0.20 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Totals
- Total dissolved substances
- 0.53 mg/kg
- Component total
- 0.53 mg/kg
- Evaporation residue
- 0.57 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
