Calcium ion: Main Effects & Top 5

National maximum

1600.0 mg/kg

Shijo Kawaramachi Onsen Soraniwa Terrace Kyoto Bettei

Table of Contents

What is Calcium ion?
Main Effects
Calcium ion Top 5 Hot Springs

What is Calcium ion?

Calcium ion (Ca²⁺) exerts an astringent action that tightens the skin. Its calming properties help soothe flushing and inflammation after bathing.

Main Effects

Skin-tightening astringent action
Calming flushing sensation
Anti-inflammatory effect

Calcium ion Top 5 Hot Springs

Top 5 hot springs registered on this site with the highest content.

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Shijo Kawaramachi Onsen Soraniwa Terrace Kyoto Bettei

京都府 Shimogyo Ward, Kyoto

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Kumihama Onsen Yumoto Kan

京都府 Kumihama, Kyotango

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* Top 5 among onsen analysis records registered in this app

References

SPRING TYPEMay 5, 2026· 1min read

Sulphate Springs: "The Healing Waters" for Wounds, Skin & Digestion

Sulphate springs (SO₄²⁻ as the main anion) are called "the healing waters" for their anti-inflammatory, skin-moisturizing properties. Indicated for bathing (cuts, cold sensitivity, dry skin, depression) and drinking (biliary dysfunction, dyslipidemia, constipation).

SPRING TYPEMay 5, 2026· 2min read

Bicarbonate Springs: "Beauty Waters" for Smooth, Glowing Skin

Bicarbonate springs (HCO₃⁻ as the main anion) are known as "the beauty waters" because bicarbonate gently removes dead skin cells and sebum, leaving skin silky smooth. Indicated for bathing (cuts, cold sensitivity, dry skin) and drinking (gastroduodenal ulcers, diabetes, gout).

MINERALMay 5, 2026· 1min read

Sulfate ion: Main Effects & Top 5

Sulfate ion (SO₄²⁻) is the main component of sulfate springs. Known as the "wound spring," it promotes skin healing, moisturization, and soothing circulation.