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

Published May 5, 2026·1min read

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).

Sulphate Springs: "The Healing Waters" for Wounds, Skin & Digestion
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Table of Contents
  1. What is a Sulphate Spring?
  2. Indications for Bathing
  3. Indications for Drinking
  4. How to Bathe in a Sulphate Spring
Sulphate spring onsen
Yujuku Onsen
群馬県 Minakami, Tone District
Photo: Partner facility

What is a Sulphate Spring?

A sulphate spring has sulphate ions (SO₄²⁻) as its dominant anion. Three subtypes exist based on the dominant cation: sodium sulphate spring (芒硝泉), calcium sulphate spring (石膏泉), and magnesium sulphate spring (正苦味泉). All share the same key bathing benefits.

Sulphate springs carry moisture to the skin and form a protective barrier, delivering excellent heat-retention and hydration. Their traditional reputation for calming inflammation and healing wounds has earned them the name "the healing waters" (傷の湯).

Indications for Bathing

  • Cuts
  • Peripheral circulatory failure
  • Excessive sensitivity to cold
  • Depression
  • Xeroderma (dry skin)

Indications for Drinking

  • Biliary dysfunction
  • Dyslipidemia (high cholesterol)
  • Constipation

How to Bathe in a Sulphate Spring

  1. Soak slowly for 15–20 minutes to extend the heat-retention effect.
  2. Pat dry without rinsing to preserve the moisturizing minerals on your skin.
  3. For wound healing, traditional balneotherapy involves soaking the affected area 2–3 times a day.

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