Ginsuiso No.2 Gensen (Inatori No.6)

Analysis Unverified
銀水荘2号源泉(稲取6号)
Inatori Sea-Warmth Spring

Inatori is a fishing town on a cape of the Izu Peninsula's east coast, known for its hanging hina doll decorations, and grew into a hot spring resort overlooking Sagami Bay as springs were developed in the Showa era. This source rises at a scalding 85.0°C, a weakly alkaline salt spring rich in chloride and calcium. It leaves a thin veil of minerals on the skin that holds in heat, so the warmth lingers after bathing. Strong yet caring, it is a seaside spring in tune with the sea breeze and waves.

AI Generated
塩
SPRING TYPE
Chloride Spring
aka "熱の湯"

Salt content forms a protective barrier on the skin and prevents moisture and heat from escaping the body even after bathing. Boosts heat retention and has moisturizing effects.

See features & indications▾
Bathing indications
Cuts and grazesPeripheral circulatory failurePoor circulationDepressionXeroderma
Drinking indications
Atrophic gastritisConstipation

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

Definition :Primary anion: chloride 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
8.2
Mildly Alkaline
Acidic ← 07 Neutral14 → Alkaline
Upper bound of mildly alkaline (pH 8.5). Notable soap-like cleansing and keratin-softening effects. Known as a "beauty spring".
TEMPERATURE
85.0℃
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.).

Chloride ionSee detail
3635 mg/kg

Boosts after-bath warmth and warms the body from the core.

Metasilicic acidSee detail
113 mg/kg

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

Bromide ionSee detail
9.9 mg/kg

Gentle calming action; often found alongside chloride.

Sodium ionSee detail
1743 mg/kg

Gentle warming effect that helps you stay warm after bathing.

Metaboric acidSee detail
8.4 mg/kg

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

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
HeatedNo
DilutedYes
RecycledYes
FilteredYes
DisinfectedYes
AdditivesNo
Disinfected: 塩素系薬剤
▸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.

EFFECTS
Spring-specific indications (bathing)
Cuts and grazesPeripheral circulatory failurePoor circulationDepressionXeroderma
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)
BATHING TIPS
AI Generated

This rich chloride spring (7.214 g/kg) heats you strongly, so avoid long soaks and take breaks. A quick rinse feels fresh, but towel off without rinsing to keep the warmth longer. Remember to hydrate.

EFFECT STORY
AI Generated

With 3,635 mg/kg of chloride, this salt spring forms a mineral film that slows evaporation, offering restorative warmth. Deep, steady heat may help ease stiff muscles and relieve pain in joints and nerves.

CAUTIONS
AI Generated

Avoid bathing during active illness (especially with fever), active tuberculosis, malignant tumors, or serious heart, lung or kidney disease. Do not bathe after drinking or right before or after meals; older people and those with high blood pressure should avoid baths of 42°C or hotter.

※ See the analysis data below for detailed contraindications

ANALYSIS DATAView all analysis fields ▼

Source Info

Source name
Ginsuiso No.2 Gensen (Inatori No.6)
Spring type
Sodium-Calcium Chloride Hot Spring
Source temperature
85℃
pH
8.2
Osmotic pressure
低張性

Analysis Document

Analysis date
2019-09-24
Analyst organization
株式会社サイエンス
Registration No.
静岡県第5号

Cations

Lithium ion Li⁺
0.70 mg/kg
Sodium ion Na⁺
1743 mg/kg
Potassium ion K⁺
124 mg/kg
Ammonium ion NH₄⁺
1.3 mg/kg
Magnesium ion Mg²⁺
15.9 mg/kg
Calcium ion Ca²⁺
820 mg/kg
Manganese ion Mn²⁺
0.70 mg/kg
Lead ion Pb²⁺
< 0.005 mg/kg
Strontium ion Sr²⁺
5.3 mg/kg
Barium ion Ba²⁺
0.10 mg/kg
Copper ion Cu²⁺
< 0.1 mg/kg
Cadmium ion Cd²⁺
< 0.001 mg/kg

Anions

Fluoride ion F⁻
1.5 mg/kg
Chloride ion Cl⁻
3635 mg/kg
Sulfate ion SO₄²⁻
674 mg/kg
Bicarbonate ion HCO₃⁻
47.1 mg/kg
Carbonate ion CO₃²⁻
5.4 mg/kg
Bromide ion Br⁻
9.9 mg/kg
Hydrogen phosphate HPO₄²⁻
0.40 mg/kg

Undissociated Components

Arsenious acid HAsO₂
0.20 mg/kg
Metasilicic acid H₂SiO₃
113 mg/kg
Metaboric acid HBO₂
8.4 mg/kg

Dissolved Gas

Free carbon dioxide CO₂
7.0 mg/kg

Totals

Component total
7.2 mg/kg

Usage

Heating
No
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
FACILITY INFO
AI draft (unverified)
Official site
Tattoo
No tattoosGuests with tattoos are strictly prohibited from using the baths.
Room with private open-air bath
Available
About tattoos and onsen
Travelers with tattoos can still bathe comfortably in a private bath (Kashikiri) or a room with a private open-air bath.
Hours
Weekdays: 05:00〜01:00
Weekends & holidays: 05:00〜01:00
The public bath and open-air bath are available from 5:00 AM to 9:30 AM and 11:30 AM to 1:00 AM. The sauna is available from 7:00 AM to 9:30 AM and 2:00 PM to 9:00 PM.
Closed days: None
Transit
Approximately 5 minutes by shuttle bus from Izukyu Line Izu-Inatori Station (伊豆急行線伊豆稲取駅). Pick-up requires advance reservation; drop-off does not. Approximately 20 minutes on foot.
Parking
Free parking available for approximately 80 cars. Standard EV charging stations are installed.
Facilities
Public BathOpen-Air BathSaunaCold Plunge PoolGift ShopEsthetic SalonOutdoor Pool (Summer Only)Lounge
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
Stay at this hotel
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Inatori Ginsuiso

From¥23,100/ person / night (tax incl.)
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Approx. lowest rate (varies by date & guests)

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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