Hakuba Happo Onsen No. 1 and No. 3 Mixed Spring
Analysis UnverifiedThis water forms where groundwater reacts with the serpentinite beneath Happo Ridge, a process known to generate natural hydrogen and methane that has drawn researchers studying the origins of life. The blend of wells No. 1 and No. 3 emerges at 48.1°C and is very light at 128.3 mg/kg total, yet hydroxide makes up about 77% of its anions, pushing pH above 11. Clear with a faint sulfur taste, it is loved locally for its silky, "smooth as an egg" feel.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
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 above 11 this water strips skin oils readily, so keep soaks moderate, go easy on soap, and moisturize soon after; linger in the open-air bath with Northern Alps views.
With pH 11.39 and 39.0 mg/kg hydroxide, the strong alkalinity softens old skin cells for truly silky skin, while the gentle, lightly mineralized simple spring invites deep relaxation amid mountain views.
Strongly alkaline water can dry or irritate sensitive skin, so moisturize after bathing and avoid overheating on long soaks.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Hakuba Happo Onsen No. 1 and No. 3 Mixed Spring
- Spring type
- Alkaline Simple Hot Spring
- Source temperature
- 48.1℃
- pH
- 11.39
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2019-04-03
- Analyst organization
- 一般社団法人 長野県薬剤師会
- Registration No.
- 長野県第2号
Cations
- Lithium ion Li⁺
- 0.07 mg/kg
- Sodium ion Na⁺
- 40.3 mg/kg
- Potassium ion K⁺
- 4.8 mg/kg
- Ammonium ion NH₄⁺
- 0.04 mg/kg
- Calcium ion Ca²⁺
- 16.6 mg/kg
- Aluminum ion Al³⁺
- 0.07 mg/kg
- Iron(II) ion Fe²⁺
- 0.03 mg/kg
- Lead ion Pb²⁺
- < 0.01 mg/kg
- Strontium ion Sr²⁺
- 0.20 mg/kg
- Barium ion Ba²⁺
- 0.09 mg/kg
- Cadmium ion Cd²⁺
- < 0.005 mg/kg
- Total cations
- 0.06 mg/kg
Anions
- Chloride ion Cl⁻
- 7.7 mg/kg
- Hydroxide ion OH⁻
- 39.0 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.20 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.10 mg/kg
- Carbonate ion CO₃²⁻
- 10.6 mg/kg
- Bromide ion Br⁻
- 0.07 mg/kg
- Hydrogen metasilicate HSiO₃⁻
- 7.3 mg/kg
- Metaborate ion BO₂⁻
- 1.1 mg/kg
- Total anions
- 0.07 mg/kg
Totals
- Total dissolved substances
- 0.13 mg/kg
- Component total
- 0.13 mg/kg
- Evaporation residue
- 0.15 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
