Miyagino No. 26, 30, 117 Combined Spring
Analysis VerifiedThe Miyagino Combined Spring supplies the Gora Onsen area, one of Hakone's 17 famous springs. Since successful drilling around 1965, this source has supported the development of the Miyagino district as a health resort. By blending multiple sources, it maintains a stable volume and quality. The soft, weakly alkaline water is gentle on the skin, leaving it feeling smooth after bathing. It is recommended for those seeking a moment of peace to gently unwind both body and mind amidst Hakone's rich nature.
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.
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.
The pH 8.4 weakly alkaline water may help soften the skin's keratin. Avoid long soaks; limit each bath to 10-15 minutes. The skin can become dry afterward, so be sure to moisturize. The temperature is relatively moderate, making it accessible even for those not fond of very hot baths.
With a pH of 8.4 and a high content of 144 mg/kg of metasilicic acid, a known skin-beautifying component, this is truly a spring for silky skin. As a gentle simple hot spring, it also promotes deep relaxation. It's perfect for days when you want to escape the everyday hustle and restore your inner balance, offering a great introduction to balneotherapy.
Avoid bathing during active stages of illness, especially with fever, or if you have severe heart disease, kidney failure, or bleeding disorders. Those with high blood pressure should avoid baths over 42°C.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Miyagino No. 26, 30, 117 Combined Spring
- Spring type
- Simple Hot Spring
- Old spring type name
- 単純温泉
- Source temperature
- 45.5℃
- pH
- 8.4
- Flow type
- 動力揚湯
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2015-11-30
- Valid until
- 2025-11-29
- Analyst organization
- 神奈川県温泉地学研究所
- Registration No.
- 神奈川県知事登録第1号
Cations
- Lithium ion Li⁺
- 0.06 mg/kg
- Sodium ion Na⁺
- 142 mg/kg
- Potassium ion K⁺
- 13.2 mg/kg
- Magnesium ion Mg²⁺
- 13.3 mg/kg
- Calcium ion Ca²⁺
- 53.9 mg/kg
- Manganese ion Mn²⁺
- 0.17 mg/kg
- Iron(II) ion Fe²⁺
- 0.07 mg/kg
- Zinc ion Zn²⁺
- 0.02 mg/kg
- Lead ion Pb²⁺
- 0.00 mg/kg
- Strontium ion Sr²⁺
- 0.18 mg/kg
- Copper ion Cu²⁺
- 0.00 mg/kg
- Cadmium ion Cd²⁺
- 0.00 mg/kg
- Total cations
- 0.22 mg/kg
Anions
- Fluoride ion F⁻
- 0.06 mg/kg
- Chloride ion Cl⁻
- 128 mg/kg
- Sulfate ion SO₄²⁻
- 164 mg/kg
- Bicarbonate ion HCO₃⁻
- 186 mg/kg
- Carbonate ion CO₃²⁻
- 3.6 mg/kg
- Bromide ion Br⁻
- 0.25 mg/kg
- Nitrate ion NO₃⁻
- 0.41 mg/kg
- Hydrogen metasilicate HSiO₃⁻
- 7.1 mg/kg
- Metaborate ion BO₂⁻
- 0.84 mg/kg
- Total anions
- 0.49 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 144 mg/kg
- Metaboric acid HBO₂
- 5.4 mg/kg
- Total undissociated
- 0.15 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 1.3 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Totals
- Total dissolved substances
- 0.86 mg/kg
- Component total
- 0.86 mg/kg
- Evaporation residue
- 0.77 mg/kg
Usage
- Heating
- Yes（To maintain a suitable temperature for bathing.）
- Dilution
- No
- Recycle / Filter
- Recycled / Filtered / A heating and circulation system is used to maintain a suitable temperature for bathing.
- Additives
- No
- Disinfection
- Yes（For sanitation purposes, chlorine-based chemicals are used.）
Indications & Contraindications
- Bathing indications
- Chronic pain or stiffness in muscles and joints (rheumatoid arthritis, osteoarthritis, low back pain, neuralgia, frozen shoulder, bruises, sprains, etc. in chronic phase), Muscle stiffness due to motor paralysis, Poor circulation, Peripheral circulatory failure, Gastrointestinal dysfunction (stomach heaviness, intestinal gas, etc.), High blood pressure (mild), Impaired glucose tolerance (diabetes), Mild hypercholesterolemia, Mild asthma or emphysema, Hemorrhoid pain, Autonomic instability, Symptoms caused by stress (insomnia, depression, etc.), Post-illness recovery period, Fatigue recovery, Health promotion
- Contraindications
- Active stages of illness (especially with fever), Active tuberculosis, Advanced malignant tumors or cases of extreme physical debilitation such as severe heart disease, Severe lung or heart disease that causes shortness of breath with slight movement, When there is visible bleeding, Acute exacerbation of a chronic illness
Drinking
- Drinkability
- Not drinkable
