Nozawa Kama Mixed Spring (Marugama, Yudegama, Takenoshigama, Shimogama, Ontake no Yu)

Analysis Unverified
丸釜、茹釜、竹伸し釜、下釜、御嶽の湯の混合
Village Kitchen Sulfur Spring

Drawn from Ogama, the boiling pools where villagers still cook vegetables and eggs, this clear water carries a strong sulfur scent and flakes of white mineral bloom. Sulfate-rich and alkaline, it warms deeply and feels smooth on the skin: a hard-working spring that has served village life for centuries.

AI Generated
This source matches 2 spring types· Tap to switch
硫塩
SPRING TYPE
Sulfate Spring

Moisturizes the skin and forms a protective barrier, producing a deeply moisturizing effect. Can also soothe inflammations and help the skin heal.

See features & indications▾
Bathing indications
Cuts and grazesPeripheral circulatory failurePoor circulationDepressionXeroderma
Drinking indications
Biliary tract diseaseDyslipidemia (high cholesterol)Constipation

※ Only at facilities permitted to serve drinking water. 200–500 mL/day recommended.

Definition :Primary anion: sulfate ion.
Source: 環境省「あんしん・あんぜんな温泉利用のいろは」(監修:日本温泉気候物理医学会) ↗Read full article
PH VALUE
9.0
Alkaline
Acidic ← 07 Neutral14 → Alkaline
Alkaline (pH > 8.5). Strong soap-like cleansing and keratin-softening effects. The characteristic slippery feel begins to appear.
TEMPERATURE
77.0℃
Very Hot Spring
Near boiling, extremely hot. Requires substantial cooling or dilution.
KEY MINERALS

The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).

Metasilicic acidSee detail
104 mg/kg

A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.

Metaboric acidSee detail
8.0 mg/kg

A trace component with gentle antibacterial and anti-inflammatory action.

Sulfate ionSee detail
529 mg/kg

Soothes the skin and gently improves circulation.

Fluoride ionSee detail
1.0 mg/kg

A trace antibacterial component that keeps skin clean.

Sodium ionSee detail
204 mg/kg

Gentle warming effect that helps you stay warm after bathing.

CHARACTER · COMPOSITION PROFILE
1234StimulationBactericidalSkin BeautyHeat RetentionRelaxation

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.

USAGE
Free-Flowing Onsen
Pure spring water — no dilution, no recirculation
HeatedNo
DilutedNo
RecycledNo
FilteredNo
DisinfectedNo
AdditivesNo
▸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.

SENSORY TEST
Color
無色澄明
Smell
強硫化水素臭
EFFECTS
Spring-specific indications (bathing)
Cuts and grazesPeripheral circulatory failurePoor circulationDepressionXerodermaAtopic dermatitisPlaque psoriasisChronic eczemaEpidermal suppuration
General indications (bathing)
High blood pressure (mild)Rheumatoid arthritisAutonomic instabilityInsomniaChronic pain or stiffness in muscles and jointsMuscle stiffness due to motor paralysisGastrointestinal dysfunction
Contraindications
Acute illness (especially with fever)Active tuberculosisMalignant tumorsSevere heart diseaseRespiratory failureRenal failureBleeding disordersSevere anemiaAny actively progressing illnessPregnancy (especially early and late stages)Severe chronic dermatitis (sulphur springs)
BATHING TIPS
AI Generated

The source runs at 77.0°C, so test the water and keep clear of the inlet. The sulfur smell is strong: bathe with good ventilation, remove silver jewelry, and moisturize after soaking in this pH 8.96 water.

EFFECT STORY
AI Generated

With 529.0 mg/kg sulfate, the water warms the body steadily and suits relieving pain in stiff muscles and joints, while 5.2 mg/kg hydrosulfide sulfur boosts circulation for restorative warmth.

CAUTIONS
AI Generated

The 77.0°C source can scald near inlets. Ventilate well because of the hydrogen sulfide, avoid long soaks, skip bathing when unwell or after alcohol, and stay hydrated.

※ See the analysis data below for detailed contraindications

ANALYSIS DATAView all analysis fields ▼

Source Info

Source name
Nozawa Kama Mixed Spring (Marugama, Yudegama, Takenoshigama, Shimogama, Ontake no Yu)
Spring type
Sulfur-containing Sodium-Calcium Sulfate Spring
Source temperature
77℃
pH
8.96
Osmotic pressure
低張性

Analysis Document

Analysis date
2014-11-05
Analyst organization
環境未来株式会社 分析センター

Cations

Sodium ion Na⁺
204 mg/kg
Potassium ion K⁺
6.8 mg/kg
Ammonium ion NH₄⁺
1.2 mg/kg
Calcium ion Ca²⁺
87.0 mg/kg
Strontium ion Sr²⁺
0.60 mg/kg
Total cations
0.30 mg/kg

Anions

Fluoride ion F⁻
1.0 mg/kg
Chloride ion Cl⁻
86.5 mg/kg
Hydroxide ion OH⁻
0.10 mg/kg
Hydrogen sulfide ion HS⁻
5.2 mg/kg
Sulfate ion SO₄²⁻
529 mg/kg
Bicarbonate ion HCO₃⁻
10.4 mg/kg
Carbonate ion CO₃²⁻
15.0 mg/kg
Bromide ion Br⁻
0.30 mg/kg
Total anions
0.65 mg/kg

Undissociated Components

Metasilicic acid H₂SiO₃
104 mg/kg
Metaboric acid HBO₂
8.0 mg/kg
Total undissociated
0.11 mg/kg

Totals

Total dissolved substances
1.1 mg/kg
Component total
1.1 mg/kg
Evaporation residue
1.0 mg/kg

Usage

Heating
No
Dilution
No
Recycle / Filter
No
Additives
No
Disinfection
No

Indications & Contraindications

Bathing indications
Cuts and grazes, Peripheral circulatory failure, Poor circulation, Depression, Xeroderma, Atopic dermatitis, Plaque psoriasis, Chronic eczema, Epidermal suppuration
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), Severe chronic dermatitis (sulphur springs)

Drinking

Drinkability
Not drinkable
FACILITY INFO
AI draft (unverified)
Official site
Tattoo
Tattoo OK
Private bath (Kashikiri)
Available
Room with private open-air bath
Available
About tattoos and onsen
Hours
For guests: Spring-Autumn 15:00-9:30 (next day), Winter 5:00-22:30, 7:00-9:00
Transit
25-minute bus ride from Shinkansen Iiyama Station (新幹線飯山駅), 4-minute walk from Chuo Terminal (中央ターミナル) bus stop. Right next to Sotoyu 'Kamiterayu' (外湯「上寺湯」).
Parking
Available (20 spaces, free)
Day use fee
¥600
Facilities
Public BathOpen-air BathLoungeShopVending MachineCoin LaundryNon-smoking throughoutWi-Fi
House rules
Entire building is non-smoking
Sources
This information may change without notice. Please contact the facility directly for accurate details.
How Long to Stay (Toji)
Start with 2 nights / 3 days

Japan’s Ministry of the Environment notes that even a short stay refreshes you. For a full therapeutic cure, around 2–3 weeks is the guideline.

More on toji length
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✨ The descriptions, catch phrases, and translations on this page are generated by AI (Claude). pH, temperature, and component values are OCR-extracted from the official analysis report. Learn more