No. 41 · Gunma

Shima Onsen

Shima Onsen ranked No. 41 in the published 2025 Japan hot-spring destination list. Check bathing options, access and stay details before planning your visit.

Shima Onsen hot-spring destination
Shima Onsen, Gunma

Spring information

Water and bathing details for Shima Onsen

Facility-level figures; blank town-wide averages are not inferred.

Named facility records for Shima Onsen. Figures marked “Not published” are not treated as town-wide averages.

FacilitySpringSource dataSupplyBath type
Shima Seiryu-no-Yu Municipal BathSodium-calcium chloride-sulfate spring. Source: The spring used at Shima Seiryu-no-Yu; the current official page does not publish its individual source name.Source temperature: Not published. Shima Onsen's regional range of 40–80°C is not assigned to this bathhouse.
pH: Not published.
Nakanojo Town lists the facility as a natural-spring day bath, with two indoor and two open-air pools. Current official text does not publish water addition, heating, circulation or disinfection conditions for each pool.Day-use bath. A useful benchmark in Shima Onsen if you want a low-cost open-air bath and a place to rest. Check the temporarily shortened hours and any extra maintenance closures before setting out.
Sekizenkan Genroku-no-Yu Day VisitSodium-calcium chloride-sulfate spring. Source: The spring used by Sekizenkan; the current official page does not publish the individual source name for Genroku-no-Yu.Source temperature: Not published.
pH: Not published.
Day visitors may use Genroku-no-Yu only. The inn describes five stone baths with water emerging from openings in their floors, but the current page does not specify water addition, heating, circulation or disinfection for the day-use baths. Conditions for the inn's other baths and private baths are not applied to day visitors.Day-use bath. Choose this bath for the architecture and the Genroku-era bath itself, not for the number of facilities. Its value lies in a room you cannot experience elsewhere.
Kawara-no-Yu Public BathNot published for this bathhouse. Shima Onsen's regional spring classification is not substituted for facility-specific data. Source: The individual spring source is not published in current official information.Source temperature: Not published.
pH: Not published.
The Shima Onsen Association lists Kawara-no-Yu as an operating communal bath. The current individual listing does not publish the spring name, temperature, or water addition, heating, circulation, disinfection or source-flow conditions.Day-use bath. A simple, free way to experience Shima's communal bathing culture near the bus terminus. The draw is its location and public access, not a long list of amenities or a place to spend the afternoon.

Destination comparison

What this onsen town offers

Popularity

85/100

History

97/100

Spring character

88/100

Town culture

90/100

Seasonal scenery

98/100

Access

57/100

Local history

How the town developed

Four seasons

Seasonal conditions and travel rhythm

SpringMar–May
Daytime range: 1–18°C
SummerJun–Aug
Daytime range: 18–27°C
AutumnSep–Nov
Daytime range: 4–22°C
WinterDec–Feb
Daytime range: -6–5°C

Plan your stay

Shima Onsen: day trip or overnight?

Compare travel time, bath access and the time you want to spend in town.

Nearby destinations

Other places in the same prefecture in the published ranking.

Related guides

Guides to Shima Onsen

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Official sources

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