Best onsen for Fatigue in Ehime

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

Try your own diagnosis
Oku Dogo Ichiyuno Mori Sulphur Spring
Sulphur SpringRadioactive SpringSimple SpringInfo pending
Oku Dogo Ichiyuno Mori
奥道後 壱湯の守
Ehime Matsuyama· 奥道後第4-1号源泉
Gorge Sulfur Spring

Okudogo No. 4-1 Gensen is drawn from the gorge upstream along the Ishite River from Dogo's historic spa town. Its lukewarm 38.7°C water is alkaline at pH 9.4 and pairs hydrosulfide ions with radon, an uncommon combination. A faint sulfur scent and slippery feel suit bathers who like long, unhurried soaks to the sound of the stream.

Onsen RyokanPrivate Rental BathRoom with Open-air Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHStrongly Alkaline9.4
0714
TEMP38.7℃
0℃50℃100℃
KEY MINERALS
Radon
118 Bq/kg

A rare radioactive spring where trace radiation absorbed via inhalation and skin is expected to stimulate cells (the "hormesis effect").

Fluoride ion
15.5 mg/kg

Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.

Metaborate ion
11.5 mg/kg

Gentle antibacterial action that conditions the skin.

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Dōgo Onsen Simple Spring
Simple SpringInfo pending
Dōgo Onsen
道後温泉本館
Ehime Matsuyama· 道後温泉 第2分湯場Dogo Onsen
Mythic Ancient Waters

Dogo Onsen appears in the ancient Iyo Fudoki and ranks among Japan's oldest hot springs. Its original natural spring has long dried up, so drilled wells are now blended at distribution stations. The Dai-ni Bun'yujo station on Kanmuriyama mixes waters of varying temperature and sends them to the heart of the spa town. The smooth alkaline water soothes the skin and leaves a gentle, lingering warmth, suiting travelers who want history and quiet rest.

Onsen RyokanPrivate Rental BathTattoo OK (public bath)
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHStrongly Alkaline9.1
0714
TEMP47.8℃
0℃50℃100℃
KEY MINERALS
Fluoride ion
12.6 mg/kg

Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.

Metasilicic acid
49.8 mg/kg

A natural moisturizer that leaves a hydrated feel on the skin.

Metaboric acid
4.5 mg/kg

A trace component with gentle antibacterial and anti-inflammatory action.

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Why onsen are considered good for Fatigue

The benefits of an onsen vary by spring type. Certain spring types are traditionally considered good for Fatigue, 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.