Ajiro Onsen Hiratsuru Jika Gensen
Analysis UnverifiedThe Ajiro Onsen Hiratsuru Jika Gensen traces back to the first springs tapped at Ajiro in 1938 and is now pumped from deep underground. True to its seaside setting, chloride makes up over 90 percent of the anions at 4421 mg per kilogram, while calcium slightly outweighs sodium among the cations. Nearly colorless, faintly salty and bitter, it is a robust coastal water.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
Astringent action that tightens the skin and soothes flushing after bathing.
- Chloride (salt)4421 mg/kg
- Feel
- Tastes salty; the warmth lasts after you get out.
- Said to
- Salt is said to form a film on the skin that keeps in heat and moisture. Bathing indications include cuts, poor circulation and dry skin.
- Note
- May sting cuts. Strong salty water can tire you—avoid long soaks.
- Source temperature60.1℃
- 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.
With about 7.6 g/kg of dissolved minerals, this chloride water is strong; soak a few minutes at a time with breaks, rinse lightly afterward to keep the warming salt film, and drink water often.
With 4421 mg/kg of chloride, the water leaves a thin salt film that may help hold warmth after bathing, offering restorative warmth and gentle relief for stiff, chilled bodies.
The water is mineral-rich, so avoid long soaks; the source is 60.1°C, so check the bath temperature first. Salt may sting cuts or sensitive skin.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Ajiro Onsen Hiratsuru Jika Gensen
- Spring type
- Calcium-Sodium Chloride Hot Spring
- Source temperature
- 60.1℃
- pH
- 7.8
- Flow rate
- 225 L/min
- Flow type
- 動力揚湯
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2025-06-19
- Analyst organization
- 一般財団法人静岡県生活科学検査センター
Cations
- Sodium ion Na⁺
- 1429 mg/kg
- Potassium ion K⁺
- 31.2 mg/kg
- Magnesium ion Mg²⁺
- 15.1 mg/kg
- Calcium ion Ca²⁺
- 1336 mg/kg
- Aluminum ion Al³⁺
- < 0.05 mg/kg
- Manganese ion Mn²⁺
- 0.08 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
- 2812 mg/kg
Anions
- Chloride ion Cl⁻
- 4421 mg/kg
- Hydroxide ion OH⁻
- 0.01 mg/kg
- Thiosulfate ion S₂O₃²⁻
- < 0.1 mg/kg
- Sulfate ion SO₄²⁻
- 320 mg/kg
- Bicarbonate ion HCO₃⁻
- 28.7 mg/kg
- Bromide ion Br⁻
- 5.0 mg/kg
- Iodide ion I⁻
- 0.50 mg/kg
- Total anions
- 4776 mg/kg
Undissociated Components
- Arsenious acid HAsO₂
- 0.04 mg/kg
- Metasilicic acid H₂SiO₃
- 46.2 mg/kg
- Metaboric acid HBO₂
- 2.0 mg/kg
- Total undissociated
- 48.2 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 11.8 mg/kg
- Total dissolved gas
- 11.8 mg/kg
Totals
- Total dissolved substances
- 7636 mg/kg
- Component total
- 7648 mg/kg
Usage
- Usage status
- Unknown
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
