Makukawa No.1 Source
Analysis UnverifiedMakukawa No.1 Source gushes naturally deep in the folds of the Azuma mountain range, beside the Makukawa stream at around 1,300 meters. Emerging at 54.2°C, the clear water mellows as it travels through the pipes, and its 154 mg/kg of metasilicic acid lends a gentle, moisturizing touch. It suits travelers who wish to unwind slowly in mountain silence.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
Transdermal absorption gently supports skin hydration and muscle relaxation.
- Metasilicic acid154 mg/kg
- Feel
- Your skin may feel smoother.
- Said to
- 50 mg/kg or more is said to mark a “skin-beautifying spring”; it is also used in skincare.
- Note
- The “skin-beautifying” label is a common rule of thumb, not a legal standard.
- Source temperature54.2℃
- Feel
- The source is 42°C or hotter; the bath may be on the hot side.
- Said to
- Heat is said to boost circulation and warm the body.
- Note
- Older people and those with high blood pressure or heart conditions should avoid baths of 42°C or more. Keep soaks short.
Effects are general descriptions based on the Ministry of the Environment’s indications by spring type, not a guarantee.
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.
As a mild, neutral simple spring, it welcomes longer soaks. Because the source emerges at 54.2°C, check each bath's temperature and pour water over yourself first; at this altitude, keep warm after bathing.
With a neutral pH of 6.6 and a gentle total of 0.3581 g/kg, this simple spring invites deep relaxation after mountain walks or long journeys. Its 154 mg/kg of metasilicic acid leaves skin feeling soft, and an unhurried soak may support rejuvenation.
The source emerges at a hot 54.2°C. At this mountain altitude, avoid bathing after drinking or when unwell, and take care not to overheat.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Makukawa No.1 Source
- Spring type
- Simple Hot Spring
- Source temperature
- 54.2℃
- pH
- 6.6
- Flow rate
- 23.7 L/min
- Flow type
- 自然湧出
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2020-09-23
- Analyst organization
- 株式会社新環境分析センター
- Registration No.
- 福島第3号
Cations
- Hydrogen ion H⁺
- < 0.1 mg/kg
- Lithium ion Li⁺
- < 0.1 mg/kg
- Sodium ion Na⁺
- 6.8 mg/kg
- Potassium ion K⁺
- 6.7 mg/kg
- Ammonium ion NH₄⁺
- 1.1 mg/kg
- Magnesium ion Mg²⁺
- 8.1 mg/kg
- Calcium ion Ca²⁺
- 26.0 mg/kg
- Aluminum ion Al³⁺
- 0.10 mg/kg
- Manganese ion Mn²⁺
- 0.90 mg/kg
- Iron(II) ion Fe²⁺
- 0.10 mg/kg
- Zinc ion Zn²⁺
- < 0.1 mg/kg
- Lead ion Pb²⁺
- not detected
- Strontium ion Sr²⁺
- 0.10 mg/kg
- Barium ion Ba²⁺
- 0.10 mg/kg
- Copper ion Cu²⁺
- < 0.1 mg/kg
- Cadmium ion Cd²⁺
- not detected
- Total cations
- 50.0 mg/kg
Anions
- Fluoride ion F⁻
- < 0.1 mg/kg
- Chloride ion Cl⁻
- 0.90 mg/kg
- Hydroxide ion OH⁻
- < 0.1 mg/kg
- Hydrogen sulfide ion HS⁻
- < 0.1 mg/kg
- Thiosulfate ion S₂O₃²⁻
- < 0.1 mg/kg
- Sulfate ion SO₄²⁻
- 62.0 mg/kg
- Bicarbonate ion HCO₃⁻
- 77.9 mg/kg
- Carbonate ion CO₃²⁻
- < 0.1 mg/kg
- Bromide ion Br⁻
- < 0.1 mg/kg
- Iodide ion I⁻
- < 0.1 mg/kg
- Hydrogen sulfate HSO₄⁻
- < 0.1 mg/kg
- Nitrite ion NO₂⁻
- < 0.1 mg/kg
- Nitrate ion NO₃⁻
- < 0.1 mg/kg
- Dihydrogen phosphate H₂PO₄⁻
- < 0.1 mg/kg
- Total anions
- 141 mg/kg
Undissociated Components
- Arsenious acid HAsO₂
- < 0.1 mg/kg
- Metasilicic acid H₂SiO₃
- 154 mg/kg
- Metaboric acid HBO₂
- 0.10 mg/kg
- Total undissociated
- 154 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 13.2 mg/kg
- Free hydrogen sulfide H₂S
- < 0.1 mg/kg
- Total dissolved gas
- 13.2 mg/kg
Totals
- Total dissolved substances
- 345 mg/kg
- Component total
- 358 mg/kg
- Evaporation residue
- 259 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
