Nishina Dogashima No. 5 and No. 16 Mixed Spring
Analysis UnverifiedOn the Dogashima coast of western Izu, famed for sculpted rocks and sea caves, two Nishina sources are blended at the town's distribution station and piped in. Calcium makes up about 70 percent of the cations and sodium about 30, while sulfate exceeds 90 percent of the anions: a classic Izu gypsum-type sulfate spring. Alkaline at pH 8.8 yet moderately rich at 2.290 g/kg, the 52.4°C water wraps a body chilled by Suruga Bay breezes, an honest water to sink into as the sea turns gold at sunset.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
A trace component with gentle antibacterial and anti-inflammatory action.
- Sulfate1472 mg/kg
- Feel
- Your skin feels moist; the water may taste slightly bitter.
- Said to
- Said to retain heat well and help heal cuts. Bathing indications include cuts and dry skin.
- Note
- It warms you well—do not stay in too long.
- Alkaline (pH)pH 8.8
- Feel
- Feels slippery and silky on the skin.
- Said to
- Said to remove old skin cells and excess sebum.
- Note
- Skin can dry out afterwards—moisturize after bathing.
- Source temperature52.4℃
- 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.
At pH 8.8 the water feels smooth on the skin. Sulfate springs keep you warm after bathing, so drink water and dry off promptly; those with dry skin may want to moisturize afterward.
With 1,472 mg/kg of sulfate and 467.9 mg/kg of calcium, this gypsum-type sulfate spring is traditionally associated with helping relieve pain from bruises and stiffness, and its 52.4°C source may offer restorative warmth.
The source is a hot 52.4°C, so check the bath temperature first. Avoid long soaks to prevent dizziness or dehydration, and drink water before and after.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Nishina Dogashima No. 5 and No. 16 Mixed Spring
- Spring type
- Calcium-Sodium Sulfate Hot Spring
- Source temperature
- 52.4℃
- pH
- 8.8
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2012-05-28
- Analyst organization
- 一般財団法人静岡県生活科学検査センター
- Registration No.
- 静岡県第1号
Cations
- Sodium ion Na⁺
- 217 mg/kg
- Potassium ion K⁺
- 7.8 mg/kg
- Magnesium ion Mg²⁺
- 0.10 mg/kg
- Calcium ion Ca²⁺
- 468 mg/kg
- Aluminum ion Al³⁺
- < 0.05 mg/kg
- Manganese ion Mn²⁺
- < 0.05 mg/kg
- Iron(II) ion Fe²⁺
- 0.40 mg/kg
- Iron(III) ion Fe³⁺
- < 0.05 mg/kg
- Copper ion Cu²⁺
- < 0.05 mg/kg
- Total cations
- 693 mg/kg
Anions
- Chloride ion Cl⁻
- 73.5 mg/kg
- Hydroxide ion OH⁻
- 0.10 mg/kg
- Sulfate ion SO₄²⁻
- 1472 mg/kg
- Bicarbonate ion HCO₃⁻
- 3.4 mg/kg
- Carbonate ion CO₃²⁻
- 5.8 mg/kg
- Bromide ion Br⁻
- < 0.05 mg/kg
- Iodide ion I⁻
- < 0.05 mg/kg
- Total anions
- 1555 mg/kg
Undissociated Components
- Arsenious acid HAsO₂
- 0.04 mg/kg
- Metasilicic acid H₂SiO₃
- 41.9 mg/kg
- Metaboric acid HBO₂
- 0.70 mg/kg
- Total undissociated
- 42.6 mg/kg
Totals
- Total dissolved substances
- 2290 mg/kg
- Component total
- 2290 mg/kg
Usage
- Heating
- Yes
- Dilution
- Yes
- Recycle / Filter
- Recycled / Filtered
- Additives
- No
- Disinfection
- Yes（塩素系薬剤）
Indications & Contraindications
- Bathing indications
- Cuts and grazes, Peripheral circulatory failure, Poor circulation, Depression, Xeroderma
- General indications
- High blood pressure (mild), Rheumatoid arthritis, Autonomic instability, Insomnia, 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
