How much does it cost?

Name: Bokyo-no-Yu (Shirasawa Roadside Station)
Address: 1297 Shirasawamachi Hiraide, Numata, Gunma 378-0125, Numata, Gunma, JP
Telephone: +81278-53-3939
Rating: 3.8

Right Onsen › Gunma › Numata

Bokyo-no-Yu (Shirasawa Roadside Station)

3.8★ · 1832 Google ratings · Numata, Gunma · 望郷の湯（道の駅白沢）

Open in Google Maps Official site (Japanese)

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

Before you go

Can you bathe here?

Price

¥800Base admission (2 hours) rose from 700 yen to 800 yen effective May 1, 2026.stated by 3 visitors · Apr 2026 – Aug 2026

Hours

10:00–21:00from the facility listing

Time limit

2 hours (additional charge for longer stays)Entry is sold in 2-hour blocks with additional charges for staying longer.stated by 4 visitors · Apr 2026 – Jul 2026

Tattoos

Not known · call aheadno policy stated in the 29 recent reviews we read or on the facility's website

How we know this

Watch out

Hair dryer

Hair dryers are available but cost extra (100 yen), a frequent complaint among reviewers.

stated by 5 visitors · Apr 2026 – Aug 2026

Lockers

Keyed lockers cost 100 yen that is NOT refunded; a free (non-locking) basket bin is offered as an alternative for valuables left elsewhere.

stated by 3 visitors · Jun 2026 – Aug 2026

The bath

What you’ll find

A scenic alkaline 'beauty water' onsen with an outdoor bath overlooking a river terrace and mountain view, attached to Michi-no-Eki Shirasawa with a restaurant and sauna, but marked by paid extras (locker, dryer), a recent price hike, and several complaints of unfriendly front-desk staff.

Outdoor bath

✓ YesOpen-air rotenburo with river-terrace and mountain views is the facility's main draw.stated by 8 visitors · May 2026 – Aug 2026

Sauna

✓ YesA dry sauna (around 94C, 6-person capacity) is available.stated by 4 visitors · Apr 2026 – Jun 2026

Cold bath

✓ YesA cold plunge pool sits next to the sauna, though one reviewer found it too lukewarm.stated by 3 visitors · Apr 2026 – Aug 2026

View

MountainThe outdoor bath overlooks a river terrace with mountain (Mt. Akagi) panoramas, widely praised as the highlight.stated by 5 visitors · May 2026 – Jun 2026

Rest area

✓ YesSpacious rest area/lounge with a koi pond view and benches.stated by 3 visitors · May 2026 – Jun 2026

Restaurant

✓ YesAn on-site restaurant serves local dishes, plus a soft-serve stand and farm produce shop.stated by 5 visitors · Apr 2026 – Aug 2026

The water

Spring type

Alkaline (smooth/silky 'beauty water')A slick, alkaline spring widely described as smoothing to the skin.stated by 3 visitors · May 2026 – Jun 2026

pH 9.8Water is a high-alkaline pH 9.8 'beauty water' (bijin-no-yu) spring.stated by 1 visitor · May 2026

Practical

What to bring

Lockers

Coin not returnedKeyed lockers cost 100 yen that is NOT refunded; a free (non-locking) basket bin is offered as an alternative for valuables left elsewhere.stated by 3 visitors · Jun 2026 – Aug 2026

Hair dryer

✓ YesHair dryers are available but cost extra (100 yen), a frequent complaint among reviewers.stated by 5 visitors · Apr 2026 – Aug 2026

Guide

What visitors add

The water

Highly alkaline 'bijin-no-yu' with a distinctly slippery/viscous feel: one reviewer cites pH 9.8, another calls it alkaline, colorless, transparent and odorless, and at least six more independently describe the toro-toro/nuru-nuru slippery skin feel. Even several low-star reviewers concede the water quality is good.

stated by 8 visitors · Apr 2026 – Aug 2026

Outdoor bath & sauna

The open-air bath and its panoramic view of the river terraces (kagan-dankyu) and mountains is the facility's headline feature — at least five reviewers praise the rotenburo view. It has no roof/shade (two reviewers note full sun exposure in summer). Indoor facilities include a lying bath and jet bath per one reviewer, with washing stations both inside and outside (two reviewers). One reviewer (May 2026) reports the jacuzzi and some baths were out of service for maintenance.

stated by 8 visitors · May 2026 – Aug 2026

Price

Hair dryers cost 100 yen (at least five reviewers complain, one noting no free outlets so bringing your own dryer won't help; another says the paid dryers are at least good Dyson/Panasonic units), and the keyed lockers cost a NON-refundable 100 yen per two reviewers — free rattan baskets are the no-cost alternative.

stated by 6 visitors · May 2026 – Aug 2026

Price

Admission rose to 800 yen per 2 hours on 1 May 2026 (three reviewers confirm the new 800-yen price; one who visited in April 2026 paid the old 700 yen and notes fees accrue per 2-hour block). One reviewer complains the price is no longer cheap and wishes the block were 3 hours.

stated by 4 visitors · Apr 2026 – Aug 2026

Day-use visits

Day-use runs on 2-hour blocks with additional fees for staying longer (two reviewers); one notes 2 hours was still enough for a leisurely visit, another finds the cutoff limiting given the koi pond and shops invite lingering. No reviewer states opening hours.

stated by 3 visitors · Apr 2026 – Jun 2026

Outdoor bath & sauna

There is a dry sauna and small cold plunge, but reports conflict on quality: one reviewer (Jun 2026) measured the roughly 6-person sauna at about 94°C with a ~2-person cold bath beside it, while another (Aug 2026) complains both sauna and cold bath are too lukewarm to get a proper reset. Separately, one reviewer notes the official website advertises a foot bath (ashiyu) that does not actually exist.

stated by 3 visitors · Jun 2026 – Aug 2026

Timing