Best onsen for Dry Skin / Atopy in Yamagata

1 picks ranked from onsen analysis-sheet data (official, verified and free-flowing sources prioritised)

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Ubayu Onsen Masugataya Sulphur Spring
Sulphur SpringFerruginous SpringAcidic SpringSimple SpringInfo pending
Ubayu Onsen Masugataya
姥湯温泉 桝形屋
Yamagata Yonezawa· 姥湯源泉
Cliffside Milky Acid Spring

Ubayu Gensen gushes naturally from fissures in acidic welded tuff at roughly 1,250 metres on the flank of Mount Dainichi in the Azuma range. Tradition holds that Endo Okura, a gold prospector, found it in 1533 after meeting a mountain crone — the yamauba whose name the source still carries. Carried down by gravity through vinyl piping and cooled in troughs that harvest sulphur flowers, its pH 2.6 waters bubble with hydrogen sulphide, tightening the skin and leaving a clean lightness behind. It suits travellers who want deep mountain stillness.

Onsen Ryokan
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHStrongly Acidic2.6
0714
TEMP51℃
0℃50℃100℃
KEY MINERALS
Aluminum ion
30.9 mg/kg

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

Free hydrogen sulfide
4.5 mg/kg

The aroma typical of sulfur springs, with circulatory and antibacterial effects.

Iron(II) ion
22.2 mg/kg

An iron-rich spring whose water turns yellow-brown to red-brown when exposed to air. Strong heat retention.

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Why onsen are considered good for Dry Skin / Atopy

The benefits of an onsen vary by spring type. Certain spring types are traditionally considered good for Dry Skin / Atopy, and the corresponding indications are listed in the legally required onsen analysis sheets. my Onsen Techo ranks the onsen best suited to your symptom and area based on analysis-sheet data, which is mandated for display under Article 18 of Japan's Hot Spring Act. Each onsen page shows mineral visualisations, bathing tips and booking options.