12-gōsen, 14-gōsen, 23-gōsen no Kongōsen

Analysis Unverified
12号泉・14号泉・23号泉の混合泉
Acidic sulfur spring that polishes the skin

A representative mixed spring from Noboribetsu Onsen, one of Japan's leading hot spring resorts. It features a tightening sensation unique to its acidic nature (pH 2.54) and a faint scent of hydrogen sulfide. It gently cares for old skin cells, promising a smooth feel after bathing. This spring is perfect for those moments when you want to refresh your mind and body, gain new vitality, or simply change your mood.

AI Generated
This source matches 3 spring types· Tap to switch
SPRING TYPE
Acidic Spring

These springs have a strong antibacterial effect which can result in a mild tingling sensation on contact. Effective for healing wounds and relieving inflammatory skin conditions. Those with sensitive skin should rinse with fresh water after bathing.

See features & indications
Bathing indications
Atopic dermatitisPlaque psoriasisEpidermal suppurationImpaired glucose tolerance (diabetes)
Cautions
  • 皮膚または粘膜の敏感な方、高齢者の皮膚乾燥症の方は禁忌です。
  • 肌が弱い方は入浴後に真湯で洗い流してください。
Definition :Contains 1 mg/kg or more of hydrogen ions.
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
2.5
Acidic
Acidic ← 07 Neutral14 → Alkaline
Acidic spring (pH < 3). Antibacterial and skin-softening effects. Known for a refreshing bathing experience.
Caution: Avoid prolonged bathing. Rinse with fresh water after bathing. Not recommended for those with open wounds.
TEMPERATURE
48.7
Hot Spring
Quite hot. Often diluted with water for a comfortable bathing temperature.
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.).

Aluminum ionSee detail
31.3 mg/kg

Strong astringent action that tightens skin. A key component of acidic springs, suited to oily or acne-prone skin.

Free hydrogen sulfideSee detail
11.5 mg/kg

The source of the distinctive sulfur smell. Dilates blood vessels via skin and inhalation to strongly boost circulation.

Metasilicic acidSee detail
302 mg/kg

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

Iron(II) ionSee detail
13.0 mg/kg

Iron content that boosts heat retention and may tint the water.

Metaboric acidSee detail
3.5 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
RecycledNo
FilteredNo
DisinfectedNo
AdditivesNo
Diluted: 源泉温度が高いため、ほぼ全ての浴槽で加水して湯温調整
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
Colorless and clear
Smell
Hydrogen sulfide odor
Taste
Astringent taste
EFFECTS
Spring-specific indications (bathing)
Atopic dermatitisPlaque psoriasisEpidermal suppurationImpaired glucose tolerance (diabetes)Chronic eczemaAutonomic instabilityInsomniaDepression
General indications (bathing)
High blood pressure (mild)Rheumatoid arthritisChronic 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)Sensitive skin or mucous membranes, eye conditions (acidic springs)Severe chronic dermatitis (sulphur springs)
BATHING TIPS
AI Generated

As an acidic spring with a pH of 2.54, it may cause a tingling sensation on sensitive skin. Avoid long soaks; start with a 3-10 minute bath. It's recommended to lightly rinse off the spring components with fresh water after bathing and apply moisturizer.

EFFECT STORY
AI Generated

With a pH of 2.54, this acidic spring is traditionally associated with supporting those with skin conditions like atopic dermatitis and chronic eczema. The abundant sulfur components are believed to condition the skin, promoting a **silky skin** feel. Furthermore, its unique properties may support **immune system stimulation**, contributing to daily health enhancement.

CAUTIONS
AI Generated

Due to its acidic nature, individuals with sensitive skin or mucous membranes, and elderly people with dry skin should bathe with caution. This water is not for drinking.

※ See the analysis data below for detailed contraindications

ANALYSIS DATAView all analysis fields ▼

Source Info

Source name
12-gōsen, 14-gōsen, 23-gōsen no Kongōsen
Spring type
Acidic Sulfur-containing Simple Hot Spring (hydrogen sulfide type)
Old spring type name
酸性硫化水素泉
Source temperature
48.7℃
pH
2.54
Osmotic pressure
Hypotonic

Analysis Document

Analysis date
2018-04-13
Valid until
2028-04-12
Analyst organization
株式会社 環境プロジェクト
Registration No.
北海道第9号

Cations

Hydrogen ion H⁺
2.5 mg/kg
Sodium ion Na⁺
31.9 mg/kg
Potassium ion K⁺
6.9 mg/kg
Ammonium ion NH₄⁺
1.0 mg/kg
Magnesium ion Mg²⁺
8.9 mg/kg
Calcium ion Ca²⁺
37.4 mg/kg
Aluminum ion Al³⁺
31.3 mg/kg
Manganese ion Mn²⁺
0.80 mg/kg
Iron(II) ion Fe²⁺
13.0 mg/kg
Iron(III) ion Fe³⁺
0.80 mg/kg
Zinc ion Zn²⁺
0.04 mg/kg
Lead ion Pb²⁺
0.00 mg/kg
Copper ion Cu²⁺
0.00 mg/kg
Cadmium ion Cd²⁺
0.00 mg/kg
Total cations
0.13 mg/kg

Anions

Fluoride ion F⁻
0.20 mg/kg
Chloride ion Cl⁻
35.2 mg/kg
Hydrogen sulfide ion HS⁻
0.00 mg/kg
Thiosulfate ion S₂O₃²⁻
0.50 mg/kg
Sulfate ion SO₄²⁻
455 mg/kg
Bicarbonate ion HCO₃⁻
0.00 mg/kg
Carbonate ion CO₃²⁻
0.00 mg/kg
Hydrogen sulfate HSO₄⁻
38.5 mg/kg
Dihydrogen phosphate H₂PO₄⁻
0.60 mg/kg
Total anions
0.53 mg/kg

Undissociated Components

Sulfuric acid H₂SO₄
0.20 mg/kg
Metasilicic acid H₂SiO₃
302 mg/kg
Metaboric acid HBO₂
3.5 mg/kg
Total undissociated
0.31 mg/kg

Dissolved Gas

Free carbon dioxide CO₂
132 mg/kg
Free hydrogen sulfide H₂S
11.5 mg/kg
Total dissolved gas
0.14 mg/kg

Totals

Total dissolved substances
0.97 mg/kg
Component total
1.1 mg/kg
Evaporation residue
0.94 mg/kg

Usage

Heating
No
Dilution
Yes(源泉温度が高いため、ほぼ全ての浴槽で加水して湯温調整)
Recycle / Filter
No
Additives
No
Disinfection
No

Indications & Contraindications

Bathing indications
Atopic dermatitis, Plaque psoriasis, Epidermal suppuration, Impaired glucose tolerance (diabetes), Chronic eczema, 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), Sensitive skin or mucous membranes, eye conditions (acidic springs), Severe chronic dermatitis (sulphur springs)

Drinking

Drinkability
Not drinkable
Drinking notes
この温泉は飲用に利用しない。
FACILITY INFO
Official site
Tattoo
Tattoo OKGuests with tattoos are welcome to enjoy the onsen culture. Some guests have reported no issues with staff regarding their tattoos.
Room with private open-air bath
Available
About tattoos and onsen
Hours
Weekdays: 09:0018:00
Weekends & holidays: 09:0018:00
Final exit time is 9:00 PM. The main public bath undergoes cleaning during the day, so some tubs may be temporarily unavailable.
Transit
From JR Noboribetsu Station (JR登別駅): Approx. 15 min by car, or 15 min by Donan Bus (道南バス) bound for Noboribetsu Onsen (登別温泉), then 7 min walk from the last stop. From Do-O Expressway Noboribetsu-Higashi IC (道央自動車道登別東IC): Approx. 10 min by car. From New Chitose Airport (新千歳空港): Approx. 70 min by highway bus, then 7 min walk from the last stop.
Parking
Free parking available (200 spaces). Overnight guests can use it free of charge. During full capacity, weekends, or peak seasons, guests may be directed to the Jigokudani Parking Lot (地獄谷駐車場) across the street (500 JPY/day). Due to vehicle height and width restrictions, staff will provide guidance upon arrival.
Day use fee
¥2,250Adults pay regular admission. Children (3-12 years old) are 1,100 JPY, children under 3 years old are free. Noboribetsu (登別) citizen discount available.
Facilities
Main Public BathOpen-air BathSaunaCold Plunge PoolJacuzziSwimming PoolDrinking Spring Water AreaEsthetic Salon
Languages supported
EN中(简)中(繁)
This information may change without notice. Please contact the facility directly for accurate details.
Last updated: 6/10/2026
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
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