Motonoyu (Hanashiki Kyoyusen)
Analysis UnverifiedMotonoyu is the shared source of Hanashiki Onsen, welling up beside the confluence of the Shirasuna and Nagasasazawa rivers and managed by the local Iriyama Hanashiki property association. Legend says Minamoto no Yoritomo named the spa after mountain flowers reflected on the water, like a carpet of blossoms. The clear water carries a faint hint of sulfur, soothes the skin and lets warmth linger long after bathing, ideal for unhurried soaks to the sound of the mountain stream.
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.
- Chloride (salt)188 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.
- Sulfate488 mg/kg
- Feel
- Your skin feels moist; the water may taste slightly bitter.
- Said to
- Said to retain heat well and help heal cuts. Bathing indications include cuts and dry skin.
- Note
- It warms you well—do not stay in too long.
- Source temperature43℃
- 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.
At around 43°C the water is hot, so pour some over yourself first and keep soaks to about ten minutes with breaks. Afterward, pat dry lightly rather than rinsing to keep the lasting warmth.
With 488 mg/kg of sulfate and 188 mg/kg of chloride at 43.0°C, this spring is traditionally associated with helping to relieve pain in stiff muscles and joints, while its chloride content may support restorative warmth after a chilly mountain walk.
The water is hot at around 43°C, so avoid long soaks; elderly bathers and those with heart or blood pressure concerns should keep baths short.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Motonoyu (Hanashiki Kyoyusen)
- Spring type
- Calcium-Sodium Sulfate and Chloride Hot Spring
- Source temperature
- 43℃
- pH
- 7.9
- Flow type
- 動力揚湯
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2013-05-08
- Analyst organization
- 一般社団法人 群馬県薬剤師会（環境衛生試験センター）
- Registration No.
- 群馬薬第2号
Cations
- Sodium ion Na⁺
- 176 mg/kg
- Potassium ion K⁺
- 6.3 mg/kg
- Magnesium ion Mg²⁺
- 0.45 mg/kg
- Calcium ion Ca²⁺
- 165 mg/kg
- Aluminum ion Al³⁺
- < 0.05 mg/kg
- Manganese ion Mn²⁺
- 0.01 mg/kg
- Iron(II) ion Fe²⁺
- < 0.01 mg/kg
- Lead ion Pb²⁺
- < 0.005 mg/kg
- Copper ion Cu²⁺
- < 0.002 mg/kg
- Total cations
- 348 mg/kg
Anions
- Fluoride ion F⁻
- 0.60 mg/kg
- Chloride ion Cl⁻
- 188 mg/kg
- Sulfate ion SO₄²⁻
- 488 mg/kg
- Bicarbonate ion HCO₃⁻
- 30.5 mg/kg
- Carbonate ion CO₃²⁻
- < 0.1 mg/kg
- Bromide ion Br⁻
- 1.2 mg/kg
- Total anions
- 708 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 49.9 mg/kg
- Metaboric acid HBO₂
- 12.2 mg/kg
- Total undissociated
- 62.1 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 6.2 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 6.2 mg/kg
Totals
- Total dissolved substances
- 1120 mg/kg
- Component total
- 1120 mg/kg
- Evaporation residue
- 1130 mg/kg
Usage
- Heating
- No
- Dilution
- No
- Recycle / Filter
- No
- Additives
- No
- Disinfection
- Yes（塩素）
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
