Yama no Kami Onsen Kotobuki-no-yu
Analysis UnverifiedHanamaki Minami Onsenkyo strings seven spas along the Toyosawa River south of Hanamaki. Yama no Kami Onsen, midway along it, takes its name from a shrine to the mountain deity. Kotobuki-no-yu is one of its wells, pumping a steady 179 liters a minute at about 41°C. Clear, faintly sulfurous and alkaline at pH 9.4, the water has a silky, clinging feel, made for unhurried soaks to the sound of the river.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
A rare radioactive spring where trace radiation absorbed via inhalation and skin is expected to stimulate cells (the "hormesis effect").
Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.
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.
At pH 9.4 the water feels slippery on the skin; stroke rather than scrub, moisturize afterward, and watch your step on slick bath edges and floors.
Alkaline at pH 9.4 with 221.8 mg/kg of sodium, this mild water may support silky skin by softening the outer layer, and a long, lukewarm soak invites deep relaxation.
Avoid bathing during acute illness or with serious heart conditions. The alkaline water makes floors and edges slippery, so move slowly, and moisturize after bathing.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Yama no Kami Onsen Kotobuki-no-yu
- Spring type
- Alkaline Simple Hot Spring
- Source temperature
- 41.3℃
- pH
- 9.4
- Flow rate
- 179 L/min
- Flow type
- 動力揚湯
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2015-12-01
- Analyst organization
- 一般社団法人 岩手県薬剤師会
- Registration No.
- 岩手県第1号
Cations
- Hydrogen ion H⁺
- 0.00 mg/kg
- Sodium ion Na⁺
- 222 mg/kg
- Potassium ion K⁺
- 1.1 mg/kg
- Magnesium ion Mg²⁺
- 0.00 mg/kg
- Calcium ion Ca²⁺
- 2.0 mg/kg
- Aluminum ion Al³⁺
- 0.00 mg/kg
- Manganese ion Mn²⁺
- 0.00 mg/kg
- Iron(II) ion Fe²⁺
- 0.20 mg/kg
- Lead ion Pb²⁺
- 0.01 mg/kg
- Copper ion Cu²⁺
- < 0.01 mg/kg
- Cadmium ion Cd²⁺
- 0.10 mg/kg
- Total cations
- 0.23 mg/kg
Anions
- Fluoride ion F⁻
- 9.0 mg/kg
- Chloride ion Cl⁻
- 69.4 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.20 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.00 mg/kg
- Sulfate ion SO₄²⁻
- 228 mg/kg
- Bicarbonate ion HCO₃⁻
- 66.6 mg/kg
- Carbonate ion CO₃²⁻
- 37.8 mg/kg
- Total anions
- 0.41 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 55.1 mg/kg
- Metaboric acid HBO₂
- 15.1 mg/kg
- Total undissociated
- 0.07 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 0.00 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Trace Components
- Radon Rn
- 25.41 Bq/kg
Totals
- Total dissolved substances
- 0.71 mg/kg
- Component total
- 0.71 mg/kg
- Evaporation residue
- 0.62 mg/kg
Usage
- Heating
- Yes
- 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
