Right Onsen › Gunma › Naganohara
Aioi-no-Yu Natural Onsen
3.8★ · 12 Google ratings · Naganohara, Gunma · 天然温泉 相生の湯
Before you go
Can you bathe here?
Day visitors
✓ YesThe resort bathhouse is open to day visitors, not just hotel/golf guests.stated by 2 visitors · May 2023 – Oct 2023
Tattoos
Not known · call aheadno policy stated in the 7 recent reviews we read or on the facility's website
The bath
What you’ll find
A spacious, upscale hotel/golf-resort bathhouse open to day visitors, with a scenic outdoor bath and sauna, though one reviewer reports a strong chlorine smell and being unable to enter the main bath at all.
Outdoor bath
✓ YesA scenic outdoor bath is mentioned by multiple reviewers.stated by 4 visitors · Oct 2022 – Oct 2023
Sauna
✓ YesA sauna (and mist sauna) is available, confirmed by several reviewers.stated by 3 visitors · Sep 2023 – Nov 2023
Guide
What visitors add
Outdoor bath & sauna
There is one open-air bath (four reviewers mention the rotenburo; one praises its view) plus a sauna and indoor bath; one reviewer additionally lists a bubble bath and what they thought was a mist sauna.
stated by 4 visitors · Oct 2022 – Oct 2023Day-use visits
Day-use bathing is available to the general public — the bath belongs to a golf resort hotel (basement level 1) and is opened to non-guests per two reviewers. One reviewer (May 2023) reports last day-use reception is 4 p.m., so plan an early visit.
stated by 3 visitors · Oct 2022 – Oct 2023The water
General impressions are positive but unspecific: one reviewer rates the water quality and view 'all the best', another says the onsen felt great — but note the conflicting single report of heavy chlorine smell (see kakenagashi claim). No spring type or mineral data appears in reviews.
stated by 2 visitors · Jul 2023 – Mar 2024Staffing
Staffed hotel-style reception; two reviewers describe the staff as kind/excellent.
stated by 2 visitors · May 2023 – Mar 2024Practical
Plan your visit
📍 〒377-1412 Gunma, Agatsuma District, Naganohara, 町北軽井沢２０３２−１６
🚃 Omae station, 13.1 km
📞 +81279-84-1441
📋 Show at the counter: 天然温泉 相生の湯
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