Yachi Onsen No. 2 Spring
Analysis UnverifiedThis spring feeds the "upper bath" of a healing retreat below the Hakkoda Mountains said to date back some 400 years. Fresh water enters the tub without long exposure to air, so it stays crystal clear down to the wooden floor while large white mineral flakes drift through it. Though classed as a simple spring, it carries a distinct sulfur aroma and is the warming partner to the lukewarm lower bath.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
The aroma typical of sulfur springs, with circulatory and antibacterial effects.
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 tub runs warm at around 40-42°C, so limit full immersion to about 10 minutes and alternate with the lukewarm lower bath to enjoy a long session without getting chilled.
At 43.4°C with just 0.336 g/kg of total minerals, this gentle simple spring is easy on the skin and invites deep relaxation, while 146.1 mg/kg of sulfate helps the warmth linger for a restorative moment of rejuvenation.
Water near the spout can be hot, so check the temperature first; take care with sudden temperature changes when alternating with the lukewarm bath, and note that sulfur may discolor metal jewelry.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Yachi Onsen No. 2 Spring
- Spring type
- Simple Hot Spring
- Source temperature
- 43.4℃
- pH
- 5.72
- Flow type
- 自然湧出
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2025-06-20
- Analyst organization
- 一般財団法人 青森県薬剤師会 食と水の検査センター
- Registration No.
- 青森県第2号
Cations
- Lithium ion Li⁺
- 0.00 mg/kg
- Sodium ion Na⁺
- 31.9 mg/kg
- Potassium ion K⁺
- 2.5 mg/kg
- Ammonium ion NH₄⁺
- 0.00 mg/kg
- Magnesium ion Mg²⁺
- 7.1 mg/kg
- Calcium ion Ca²⁺
- 35.7 mg/kg
- Aluminum ion Al³⁺
- 0.00 mg/kg
- Manganese ion Mn²⁺
- 0.20 mg/kg
- Iron(II) ion Fe²⁺
- 0.10 mg/kg
- Zinc ion Zn²⁺
- 0.04 mg/kg
- Lead ion Pb²⁺
- < 0.01 mg/kg
- Copper ion Cu²⁺
- < 0.01 mg/kg
- Cadmium ion Cd²⁺
- < 0.005 mg/kg
- Total cations
- 0.08 mg/kg
Anions
- Fluoride ion F⁻
- 0.10 mg/kg
- Chloride ion Cl⁻
- 10.9 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.00 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.30 mg/kg
- Sulfate ion SO₄²⁻
- 146 mg/kg
- Bicarbonate ion HCO₃⁻
- 34.8 mg/kg
- Carbonate ion CO₃²⁻
- 0.00 mg/kg
- Bromide ion Br⁻
- 0.00 mg/kg
- Iodide ion I⁻
- 0.00 mg/kg
- Hydrogen sulfate HSO₄⁻
- 0.00 mg/kg
- Dihydrogen phosphate H₂PO₄⁻
- 0.00 mg/kg
- Sulfide ion S²⁻
- 0.00 mg/kg
- Total anions
- 0.19 mg/kg
Undissociated Components
- Sulfuric acid H₂SO₄
- 0.00 mg/kg
- Metasilicic acid H₂SiO₃
- 31.5 mg/kg
- Metaboric acid HBO₂
- 1.3 mg/kg
- Total undissociated
- 0.03 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 32.9 mg/kg
- Free hydrogen sulfide H₂S
- 0.40 mg/kg
- Total dissolved gas
- 0.03 mg/kg
Totals
- Total dissolved substances
- 0.30 mg/kg
- Component total
- 0.34 mg/kg
- Evaporation residue
- 0.26 mg/kg
Usage
- Heating
- No
- Dilution
- No
- Recycle / Filter
- No
- Additives
- No
- Disinfection
- No
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
