Mimata Onsen
Analysis UnverifiedMimata Onsen is said to have been discovered in 1864, late in the Edo period, along the Mimata River, a tributary of the Gonokawa. Around the Russo-Japanese War it hosted a convalescent home for the Hamada regiment, and it has served as a toji spa for over a century. Today's water flows naturally from a well drilled in 1996, marked by strong alkalinity at pH 9.7 and a slippery feel that wraps the skin.
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 46.5°C at the source the water runs a little hot, so pour some over yourself first and soak in rounds of about 10 minutes. At pH 9.7 it softens the skin's surface, so skip hard scrubbing and simply smooth your skin by hand.
With pH 9.7 alkalinity plus 83.5 mg/kg of hydrogen metasilicate and 49.2 mg/kg of carbonate, this gentle simple spring is loved for leaving skin silky smooth and invites deep relaxation.
Strong alkalinity can dry the skin with long soaks or hard scrubbing; moisturize afterward if needed, and as the water is fairly hot, drink water before and after bathing.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Mimata Onsen
- Spring type
- Alkaline Simple Hot Spring
- Source temperature
- 46.5℃
- pH
- 9.7
- Flow type
- 掘削自噴
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2019-06-25
- Analyst organization
- 公益財団法人島根県環境保健公社
Cations
- Lithium ion Li⁺
- 0.03 mg/kg
- Sodium ion Na⁺
- 66.2 mg/kg
- Potassium ion K⁺
- 0.40 mg/kg
- Calcium ion Ca²⁺
- 1.3 mg/kg
- Aluminum ion Al³⁺
- 0.05 mg/kg
- Strontium ion Sr²⁺
- 0.01 mg/kg
- Total cations
- 0.07 mg/kg
Anions
- Fluoride ion F⁻
- 3.4 mg/kg
- Chloride ion Cl⁻
- 22.3 mg/kg
- Sulfate ion SO₄²⁻
- 16.5 mg/kg
- Bicarbonate ion HCO₃⁻
- 9.8 mg/kg
- Carbonate ion CO₃²⁻
- 49.2 mg/kg
- Hydrogen metasilicate HSiO₃⁻
- 83.5 mg/kg
- Metaborate ion BO₂⁻
- 0.30 mg/kg
- Total anions
- 0.18 mg/kg
Totals
- Component total
- 0.25 mg/kg
- Evaporation residue
- 0.26 mg/kg
Usage
- Heating
- Yes（Yahoo!トラベル（travel.yahoo.co.jp/00910867）大浴場欄『かけ流し なし』『補足事項 源泉100% （加温）』（2026-10-01確認）。）
- Dilution
- No
- Recycle / Filter
- Recycled / Filtered / じゃらん yad350848 温泉欄『美又温泉(循環ろ過)』（2026-10-01確認）。Yahoo!トラベルも『かけ流し なし』。
- Additives
- No
- Disinfection
- Yes
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