Table of Contents▾
What is Manganese ion?
Hot springs containing manganese ion (Mn²⁺) at ≥ 10 mg/kg are rare in Japan. This trace element keeps the stratum corneum supple and supports the skin's antioxidant defense.
Main Effects
- Keeps the stratum corneum suppleManganese is a trace element that supports the metabolic processes of keratinocytes, the cells that form the skin's outer layer. This action may help refine skin texture and maintain the natural flexibility of the stratum corneum.
- Antioxidant action as an SOD cofactorManganese acts as a cofactor for superoxide dismutase (SOD), an enzyme that neutralizes harmful free radicals. This function helps to alleviate oxidative stress on the skin, protecting it from cellular damage.
- Found in very few hot springs nationwideAccording to Japan's Ministry of the Environment guidelines, a spring must contain at least 10 mg/kg of manganese ions (Mn²⁺) to be officially recognized for this component. Hot springs that meet this standard are exceptionally rare across the country.
Manganese ion Top 5 Hot Springs
Top 5 hot springs registered on this site with the highest content.
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ANALYSIS REPORTS WITH THIS MINERAL
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Onsen analysis reports visualized by minerals, pH, temperature, and a 5-axis profile. The carousel updates as you change the filters above.
Rabisuta Kusatsuhiruzu
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▾
- ⚠ 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。
Bandaiko is one of Kusatsu Onsen's defining springs, deeply entwined with the town's long tradition of yutomi (water-mixing) and therapeutic bathing. Its name is said to trace back to the area's mining heritage, giving it a rugged, authentic character. It is the ideal spring for those seeking a genuine curative experience—especially anyone looking to reset troubled skin or shake off deep-seated fatigue.
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.
Strong astringent action that tightens skin. A key component of acidic springs, suited to oily or acne-prone skin.
Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
A trace component with gentle antibacterial and anti-inflammatory action.
Bandaiko is one of Kusatsu Onsen's defining springs, deeply entwined with the town's long tradition of yutomi (water-mixing) and therapeutic bathing. Its name is said to trace back to the area's mining heritage, giving it a rugged, authentic character. It is the ideal spring for those seeking a genuine curative experience—especially anyone looking to reset troubled skin or shake off deep-seated fatigue.
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.
Strong astringent action that tightens skin. A key component of acidic springs, suited to oily or acne-prone skin.
Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
A trace component with gentle antibacterial and anti-inflammatory action.
Kusatsuonsen Bouun
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▾
- ⚠ 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。
Bandaiko is one of Kusatsu Onsen's defining springs, deeply entwined with the town's long tradition of yutomi (water-mixing) and therapeutic bathing. Its name is said to trace back to the area's mining heritage, giving it a rugged, authentic character. It is the ideal spring for those seeking a genuine curative experience—especially anyone looking to reset troubled skin or shake off deep-seated fatigue.
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.
Strong astringent action that tightens skin. A key component of acidic springs, suited to oily or acne-prone skin.
Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
A trace component with gentle antibacterial and anti-inflammatory action.
Bandaiko is one of Kusatsu Onsen's defining springs, deeply entwined with the town's long tradition of yutomi (water-mixing) and therapeutic bathing. Its name is said to trace back to the area's mining heritage, giving it a rugged, authentic character. It is the ideal spring for those seeking a genuine curative experience—especially anyone looking to reset troubled skin or shake off deep-seated fatigue.
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.
Strong astringent action that tightens skin. A key component of acidic springs, suited to oily or acne-prone skin.
Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
A trace component with gentle antibacterial and anti-inflammatory action.
Kusatsu Onsen Hotel Sakurai
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▾
- ⚠ 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。
Bandaiko is one of Kusatsu Onsen's defining springs, deeply entwined with the town's long tradition of yutomi (water-mixing) and therapeutic bathing. Its name is said to trace back to the area's mining heritage, giving it a rugged, authentic character. It is the ideal spring for those seeking a genuine curative experience—especially anyone looking to reset troubled skin or shake off deep-seated fatigue.
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.
Strong astringent action that tightens skin. A key component of acidic springs, suited to oily or acne-prone skin.
Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
A trace component with gentle antibacterial and anti-inflammatory action.
Bandaiko is one of Kusatsu Onsen's defining springs, deeply entwined with the town's long tradition of yutomi (water-mixing) and therapeutic bathing. Its name is said to trace back to the area's mining heritage, giving it a rugged, authentic character. It is the ideal spring for those seeking a genuine curative experience—especially anyone looking to reset troubled skin or shake off deep-seated fatigue.
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.
Strong astringent action that tightens skin. A key component of acidic springs, suited to oily or acne-prone skin.
Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
A trace component with gentle antibacterial and anti-inflammatory action.
Kusatsuonsen Sen
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▾
- ⚠ 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。
Bandaiko is one of Kusatsu Onsen's defining springs, deeply entwined with the town's long tradition of yutomi (water-mixing) and therapeutic bathing. Its name is said to trace back to the area's mining heritage, giving it a rugged, authentic character. It is the ideal spring for those seeking a genuine curative experience—especially anyone looking to reset troubled skin or shake off deep-seated fatigue.
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.
Strong astringent action that tightens skin. A key component of acidic springs, suited to oily or acne-prone skin.
Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
A trace component with gentle antibacterial and anti-inflammatory action.
Bandaiko is one of Kusatsu Onsen's defining springs, deeply entwined with the town's long tradition of yutomi (water-mixing) and therapeutic bathing. Its name is said to trace back to the area's mining heritage, giving it a rugged, authentic character. It is the ideal spring for those seeking a genuine curative experience—especially anyone looking to reset troubled skin or shake off deep-seated fatigue.
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.
Strong astringent action that tightens skin. A key component of acidic springs, suited to oily or acne-prone skin.
Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
A trace component with gentle antibacterial and anti-inflammatory action.
Kamenoihoteru Kusatsurizoto
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▾
- ⚠ 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。
Bandaiko is one of Kusatsu Onsen's defining springs, deeply entwined with the town's long tradition of yutomi (water-mixing) and therapeutic bathing. Its name is said to trace back to the area's mining heritage, giving it a rugged, authentic character. It is the ideal spring for those seeking a genuine curative experience—especially anyone looking to reset troubled skin or shake off deep-seated fatigue.
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.
Strong astringent action that tightens skin. A key component of acidic springs, suited to oily or acne-prone skin.
Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
A trace component with gentle antibacterial and anti-inflammatory action.
Bandaiko is one of Kusatsu Onsen's defining springs, deeply entwined with the town's long tradition of yutomi (water-mixing) and therapeutic bathing. Its name is said to trace back to the area's mining heritage, giving it a rugged, authentic character. It is the ideal spring for those seeking a genuine curative experience—especially anyone looking to reset troubled skin or shake off deep-seated fatigue.
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.
Strong astringent action that tightens skin. A key component of acidic springs, suited to oily or acne-prone skin.
Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
A trace component with gentle antibacterial and anti-inflammatory action.
References
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