Right Onsen › Gunma › Kawaba
Koju Onsen
4.1★ · 299 Google ratings · Kawaba, Gunma · 小住温泉
✓ Day visitors✓ Outdoor bath
Before you go
Can you bathe here?
Day visitors
✓ YesConfirmed by recent visitor reports
Hours
Not publishedCheck the official site
Tattoos
? Call aheadNo policy stated in the 36 recent reviews we read or on the facility's website
Price
¥750 adultConfirmed by recent visitor reports
Bathing
Men and women separateReported by two visitors
How we know this
- Day visitors: Long-running day-use bathhouse and restaurant, but the two most recent reviews (mid-2024 and March 2025) both report it closed - one for a boiler malfunction - so travelers should confirm it has reopened before visiting. · 20 visitors, Feb 2023 – Mar 2025
- Price: Adult entry was 750 yen in the most recent reviews, up from 650 yen reported in earlier 2023 visits. · 3 visitors, Jan 2024 – Jun 2024
- Bathing arrangement: Men's and women's baths are separate, with one reviewer noting crowding can vary by gender and time of day. · 2 visitors, Mar 2023 – Jan 2024
The bath
What you’ll find
A day-use onsen and restaurant in Kawaba village known more for its food (soba, pork dishes, apple pie) and a free upstairs relax lounge with massage chairs and hammocks than for its mild, recirculated, heated sulfur-tinged spring water, though the two most recent reviews report the facility closed for a boiler breakdown.
Bath setup
Indoor baths
1.0Reported by one visitor
Outdoor bath
✓ YesConfirmed by recent visitor reports
Sauna
✕ NoReported by one visitor
Spring water
Spring type
simple sulfur spring / weakly alkaline simple springReported by two visitors
Source temperature
27°CReported by one visitor
Free-flowing (kakenagashi)
NoReported by two visitors
Recirculated
✓ YesReported by two visitors
How we know this
- Indoor baths: One reviewer explicitly counts one indoor bath. · 1 visitor, Feb 2023
- Outdoor bath: An outdoor bath, usually described as noticeably milder/cooler than the indoor one, is present. · 10 visitors, Feb 2023 – Mar 2024
- Sauna: No sauna is present. · 1 visitor, Feb 2023
- Spring type: Posted signage describes the spring inconsistently as both a simple sulfur spring and a weakly alkaline simple spring; several reviewers note the sulfur smell is faint to nonexistent. · 2 visitors, Feb 2023 – Jul 2023
- Source temperature: One reviewer cites a source temperature of about 27°C, requiring heating before bathing. · 1 visitor, Sep 2023
- Free-flowing (kakenagashi): The water is recirculated rather than a true kakenagashi flow-through system. · 2 visitors, Feb 2023 – Jul 2023
- Recirculated: Confirmed as a fully recirculated (non-flow-through) bath by two independent reviewers. · 2 visitors, Feb 2023 – Jul 2023
- Full spring description: simple sulfur spring / weakly alkaline simple spring (signage is inconsistent)
Practical
What you need
Hair dryer
✓ YesReported by two visitors
Facilities
Rest area
✓ YesConfirmed by recent visitor reports
Restaurant
✓ YesConfirmed by recent visitor reports
How we know this
- Hair dryer: Premium Dyson hair dryers are provided. · 2 visitors, Feb 2023 – Mar 2023
- Rest area: A free second-floor lounge with massage chairs, hammocks, and sofas is repeatedly praised. · 5 visitors, Feb 2023 – Jun 2024
- Restaurant: A well-regarded on-site restaurant serving substantial local dishes (soba, pork, fish) and pastries is a major draw, with some visitors coming for the food alone. · 12 visitors, Apr 2023 – Jun 2024
Getting there
How to get there
Nearest station
Numata12.8 km in a straight line; bus or taxi from the station
Address
1851 Kawabayubara, Kawaba, Tone District, Gunma 378-0102〒378-0102 Gunma, Tone District, Kawaba, Kawabayubara, 1851 郡川場 · From the facility's listing
Show a driver
小住温泉The name in Japanese, for a taxi or at the counter
Phone
+81278-25-8695Japanese-speaking. For tattoos or private baths a call is the only sure answer
Website
kanko.vill.kawaba.gunma.jpOfficial, in Japanese
The map loads only when you ask for it and connects your browser to Google.
Nearby
Other baths close by
Station of Flower Katashina Hanasaku Hot Spring
4.1★ · 6.5 km · Katashina
✓Day useTattoos ?✓Outdoor bath✓Sauna
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Questions
Common questions
Can I visit Koju Onsen without staying overnight?
Long-running day-use bathhouse and restaurant, but the two most recent reviews (mid-2024 and March 2025) both report it closed - one for a boiler malfunction - so travelers should confirm it has reopened before visiting.
How much does Koju Onsen cost?
Adult entry was 750 yen in the most recent reviews, up from 650 yen reported in earlier 2023 visits.
Is the water free-flowing spring water?
The water is recirculated rather than a true kakenagashi flow-through system.
