CHLORIDE

Chloride ion: Main Effects & Top 5

Published May 5, 2026·1min read

Chloride ion (Cl⁻) is the main component of chloride springs. Like sea salt, it forms a thin film on the skin trapping heat, earning the nickname "hot spring" (熱の湯).

Table of Contents

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

What is Chloride ion?

Chloride ion (Cl⁻) is the main component of chloride springs. Like sea salt, it forms a thin film on the skin trapping heat, earning the nickname "hot spring" (熱の湯).

Main Effects

Outstanding heat retention after bathingThe chloride ions in the water form a thin saline film on your skin. This 'veil' of salt helps prevent the body's heat from dissipating after you leave the bath, which is why these springs are known for keeping you warm long after your soak.
Indicated for poor circulation and peripheral vascular disordersThe warmth of the bath helps dilate peripheral blood vessels, and the salt film left on the skin helps sustain this improved blood flow for longer. This prolonged warming effect may help alleviate symptoms associated with a tendency to feel cold.
Indicated for atrophic gastritis and constipation (drinking)When this type of spring water is consumed, the chloride can stimulate the secretion of gastric juices. This in turn may help activate digestive functions and promote intestinal peristalsis, potentially offering relief from these conditions.

Chloride ion Top 5 Hot Springs

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

RANKING BY THIS MINERAL CONTENT

References

SPRING TYPEMay 5, 2026· 2min read

Chloride Springs: Benefits, Indications & Recommended Onsen

Chloride springs (Cl⁻ as the main anion) are known as "the hot-retaining waters" because the salt coating on your skin keeps body heat from escaping after bathing. Excellent for cold sensitivity and dry skin.

MINERALMay 5, 2026· 1min read

Sodium ion: Main Effects & Top 5

Sodium ion (Na⁺) is the key component of chloride and bicarbonate springs. It forms a thin salt film on the skin, locking in warmth long after bathing.

SPRING TYPEMay 5, 2026· 1min read

Simple Springs (Tanjun Onsen): Gentle Waters for Everyone

Simple springs have dissolved components below 1,000 mg/kg and a source temperature of 25°C or above. Mild and non-irritating, they are safe for all ages. Alkaline simple springs (pH 8.5+) are famous for leaving skin silky smooth.