Tokachigawa Onsen (Kyodo No. 1, Choei No. 3 and Sasai Gensen Mixed Spring)
Analysis UnverifiedTokachigawa Onsen is famed for its "moor" water, which rises through layers of ancient plant deposits and was named a Hokkaido Heritage in 2004. This source blends three wells at the town's distribution station and is piped widely to inns along the river. Its faint amber water feels soft thanks to humic matter and bicarbonate, leaving skin moist, while the chloride content holds the warmth, a spring for those who want to warm up deeply under the clear skies of the Tokachi Plain.
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.
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
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 source emerges at a hot 54.8°C, so pour water over yourself first. Glide your hands over the slightly slick, mildly alkaline water, then dry off promptly to lock in the chloride warmth.
With 490.8 mg/kg of chloride, this water is known for Restorative warmth, while 290.5 mg/kg of bicarbonate and humic matter in mildly alkaline water may support Silky skin, ideal for chilly-season trips.
The source is a hot 54.8°C and some tubs may feel hot. This spring warms you quickly, so avoid long soaks, rehydrate afterwards, and do not drink the water.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Tokachigawa Onsen (Kyodo No. 1, Choei No. 3 and Sasai Gensen Mixed Spring)
- Spring type
- Sodium Chloride and Bicarbonate Hot Spring
- Source temperature
- 54.8℃
- pH
- 7.9
- Flow type
- 動力揚湯
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2014-10-30
- Analyst organization
- 一般財団法人北海道薬剤師会公衆衛生検査センター
- Registration No.
- 北海道第2号
Cations
- Sodium ion Na⁺
- 414 mg/kg
- Potassium ion K⁺
- 7.9 mg/kg
- Ammonium ion NH₄⁺
- 0.10 mg/kg
- Magnesium ion Mg²⁺
- 0.50 mg/kg
- Calcium ion Ca²⁺
- 7.7 mg/kg
- Aluminum ion Al³⁺
- not detected
- Manganese ion Mn²⁺
- 0.03 mg/kg
- Iron(II) ion Fe²⁺
- 0.30 mg/kg
- Iron(III) ion Fe³⁺
- 0.00 mg/kg
- Zinc ion Zn²⁺
- 0.01 mg/kg
- Lead ion Pb²⁺
- not detected
- Copper ion Cu²⁺
- 0.00 mg/kg
- Cadmium ion Cd²⁺
- not detected
- Total cations
- 0.43 mg/kg
Anions
- Fluoride ion F⁻
- 2.4 mg/kg
- Chloride ion Cl⁻
- 491 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.00 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.00 mg/kg
- Sulfate ion SO₄²⁻
- 1.4 mg/kg
- Bicarbonate ion HCO₃⁻
- 291 mg/kg
- Carbonate ion CO₃²⁻
- 18.7 mg/kg
- Hydrogen phosphate HPO₄²⁻
- 0.50 mg/kg
- Total anions
- 0.80 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 123 mg/kg
- Metaboric acid HBO₂
- 41.2 mg/kg
- Total undissociated
- 0.16 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 6.1 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.01 mg/kg
Totals
- Total dissolved substances
- 1.4 mg/kg
- Component total
- 1.4 mg/kg
- Evaporation residue
- 1.2 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
