Right Onsen › Gunma › Numata

Kuyahara Hot Spring

Name: Kuyahara Hot Spring
Address: 327-4 Kuyaharamachi, Numata, Gunma 378-0005, Numata, Gunma, JP
Telephone: +81278-25-3185
Rating: 4.2

4.2★ · 184 Google ratings · Numata, Gunma · 久屋原温泉

Open in Google Maps Official site (Japanese)

✓ Private day-use bath✓ Natural hot-spring water✓ Free-flowing source water✓ Outdoor bath✓ Rest area✓ Restaurant

Before you go

Can you bathe here?

Day visitors

✓ YesA standard pay-per-visit day-use hot spring (higaeri onsen), open to the public.stated by 2 visitors · Feb 2026

Hours

10:00–22:00 · closed Thursdayfrom the facility listing

Price

¥800Base weekday adult admission is reported as 800 yen (Feb 2026), though earlier reviews (Sep-Nov 2025, Jan 2026) cite 600 yen and one visitor paid 1000 yen; price appears to have risen over time or varies by day.stated by 4 visitors · Nov 2025 – Feb 2026

Bathing arrangement

Men and women separateSeparate men's and women's bathing areas are described.stated by 2 visitors · Sep 2025 – Apr 2026

Tattoos

Not known · call aheadno policy stated in the 38 recent reviews we read or on the facility's website

How we know this

Watch out

Lockers

Locker keys are issued at the front desk (included in admission), but the facility is small and lockers can run out, causing waits of up to 30 minutes when busy.

stated by 3 visitors · Feb 2026 – Aug 2026

The bath

What you’ll find

A modern, resort-style day-use hot spring complex near Numata with indoor and outdoor alkaline baths, a small dry sauna, a cold plunge, an on-site restaurant, and a reservable private bath.

Outdoor bath

✓ YesThe main baths include both an indoor tub and an outdoor (rotenburo) tub.stated by 4 visitors · Sep 2025 – Apr 2026

Indoor baths

1One indoor tub and one outdoor tub per gender side.stated by 2 visitors · Sep 2025 – Feb 2026

Outdoor baths

1One outdoor tub per gender side, alongside the indoor tub.stated by 2 visitors · Sep 2025 – Feb 2026

Sauna

✓ YesA small dry sauna is on site, frequently described as cramped (fits only 2-3 people).stated by 5 visitors · Nov 2025 – Aug 2026

Cold bath

✓ YesA cold plunge bath is available and repeatedly praised as very cold.stated by 5 visitors · Nov 2025 – Feb 2026

Rest area

✓ YesA rest area (with a small nap room) exists but is frequently described as too small, especially on busy days.stated by 4 visitors · Oct 2025 – Jan 2026

Restaurant

✓ YesAn on-site restaurant serves local food, but it has separate hours/closed days from the bath and can close early.stated by 4 visitors · Aug 2025 – Jul 2026

The water

Spring type

Alkaline simple springThe spring is an alkaline simple onsen (arukari-sei tanjun-sen), with visible micro-bubbles clinging to skin.stated by 1 visitor · Aug 2026

Bath temperature

42°CBath temperature is reported in the low-to-mid 40s C, ranging from 41 to 44°C across visits.stated by 3 visitors · Nov 2025 – Feb 2026

Practical

What to bring

Lockers

✓ FreeLocker keys are issued at the front desk (included in admission), but the facility is small and lockers can run out, causing waits of up to 30 minutes when busy.stated by 3 visitors · Feb 2026 – Aug 2026

Hair dryer

✓ YesFree Dyson hair dryers are provided.stated by 3 visitors · Jul 2025 – Apr 2026

Guide

What visitors add

Outdoor bath & sauna

The bath area has one indoor bath, one outdoor bath, a dry sauna and a cold plunge (confirmed by at least 4 distinct reviewers); the sauna is repeatedly described as tiny — capacity given as 2 to 3 people by 4 reviewers — and one reviewer measured it at only 75°C.

stated by 7 visitors · Sep 2025 – Aug 2026

Price

One reviewer (Feb 2026) details weekday admission of 800 yen reduced to 600 yen via a 100-yen JAF discount plus a further 100-yen service-time discount; two other reviewers cite 600 yen admission, one cites 800 yen, and one reports paying 1000 yen on a public holiday. JAF discount amounts conflict: 100 yen (1 reviewer) vs 50 yen (1 reviewer).

stated by 6 visitors · Jul 2025 – Mar 2026

The water

Reported water temperature conflicts: one reviewer says 41°C for the outdoor bath, one says both pools are 44°C, one says 42-44°C, one calls the bath hot-ish (熱め), while two others call it lukewarm (ぬるめ/ぬるい).

stated by 6 visitors · Oct 2025 – Mar 2026

Day-use visits

Two reviewers (Jan 2026) say bathing is available until 22:00, and a third notes it stays open later than other day-use onsen in the area; one reviewer (Apr 2026) says the bath is closed only on Thursdays; one reviewer (Feb 2026) was refused entry despite arriving 30 minutes before the stated reception cutoff.

stated by 5 visitors · Sep 2025 – Apr 2026

Towels, soap & lockers

Locker keys are assigned at reception (2 reviewers), which can create entry waits when full: one reviewer waited 30 minutes for a locker; one reviewer found the changing room and lockers small, with no shelf space inside the bath area, and another confirms there is no place to put belongings in the bath.

stated by 4 visitors · Feb 2026 – Aug 2026

Staffing

The facility has staffed reception; three reviewers praise staff as kind or pleasant, while one reviewer (Feb 2026) complains reception staff were slouching and chatting loudly, audible from the rest area.

stated by 4 visitors · Sep 2025 – May 2026

Timing