An auberge Hotel featuring river views, with private open-air baths in every room supplied by free-flowing natural hot spring water.

Opened in November 2024, "Kanouya Shima Onsen" offers all rooms with private open-air Onsen baths featuring natural hot spring water. Situated along the clear Shimagawa River, you can enjoy breathtaking views of Shima's nature through large windows and from the baths. Escape the hustle and bustle of the city and indulge in a relaxing time immersed in nature.

  • I was able to relax from arrival to departure!The open-air Onsen bath was amazing, and both dinner and breakfast were delicious—making for a truly happy stay.The river flowing past the lobby and visible from the Room, along with the lush green trees, was incredibly beautiful, letting you fully enjoy summer in the mountains.One drawback is that because it is built along the riverbank, getting up and down can be difficult. There is no elevator, so all movement is by stairs. In particular, the stairs down to the first floor are quite narrow and steep (though you likely won’t need to move around inside the Hotel very often).Also, precisely because the Onsen is so wonderful, you’ll want to soak many times—but despite that, the bath towels were thin and there were no bathrobes. Very disappointing! With such a great Onsen, I wish they would make it easier to fully enjoy it!That said, overall it was a fantastic experience, and I would definitely like to visit again.

    かりかりんとう7 9/7/2026
  • The first floor features a wonderful, very spacious Room with high ceilings. In particular, the Room includes an open-air bath where you can bathe standing up, and I was very satisfied because I could soak many times and even exercise in the bath. The food was also excellent—the steak was tender, high-quality Joshu beef. The international staff spoke polite Japanese very well.

    のいたか 9/14/2026

Facilities and Services

See All
  • Hot spring
  • Room with Open-Air Bath
  • Spa facility
Free-flowing hot spring / Free shuttle service / Room service
IN15:00~20:00
OUT10:00
Number of rooms8 rooms
PetNot allowed
Your childPermitted

Introduction of the Accommodation

KANOUYA Shima Onsen Exterior (Night)
Kanouya Shima Onsen Exterior
KANOUYA Shima Onsen Exterior (Daytime)
KANOUYA Shima Onsen Entrance
KANOUYA Shima Onsen Exterior (Night)
Kanouya Shima Onsen Exterior

Kanouya Shima Onsen Exterior

A relaxing accommodation with private open-air hot spring baths overlooking the clear stream of Shima River.

Opened in November 2024, "Kanouya Shima Onsen" is nestled along the Shimagawa River. The building, featuring a simple and stylish Nordic design that harmonizes with the surrounding nature, offers eight luxurious rooms, each equipped with a private open-air Onsen bath fed by natural hot springs. Guests can enjoy the beauty of Shima's changing seasons through large windows and from their baths. Escape the hustle and bustle of city life and indulge in serene moments accompanied by the gentle lullaby of flowing water.

"Joshu Beef" Bone-in Sirloin Steak
Restaurant "J’s CANYON"
Restaurant "J’s CANYON"
"Joshu Beef" Bone-in Sirloin Steak
Restaurant "J’s CANYON"

Restaurant "J’s CANYON"

A steakhouse run by a chef who won 3rd place in the "JAPAN Burger Championship 2024" for the whole country is available on-site.

The facility features "J’s CANYON," a steakhouse supervised by Chef Sato, who achieved 3rd place nationwide at the food sports event "JAPAN Burger Championship 2024" (JBC). The menu offers an authentic steak dinner made with Joshu beef sirloin. The L-bone sirloin steak, known for its rich flavor from collagen seeping out of the bone, is a popular cut. Expert chefs who understand the ingredients perfectly ensure precise cooking to bring out the best taste of the meat.

Room with Private Open-Air Bath
All rooms feature private open-air hot spring baths with natural flowing spring water.

Each Room features a unique layout and ambiance, all offering scenic views. Equipped with open-air hot spring baths fed directly from the source, the design embraces a Nordic lifestyle that values time spent in harmony with nature. Large picture windows frame the stunning beauty of the Shima River like a painting, seamlessly blending it into your stay.

Spa and Beauty Salon
Private spa salon available.

At the private esthetic salon Sowaka located within our facility, we offer treatments for radiant skin and mental rejuvenation. Our menu includes a variety of services such as body care, facials, and reflexology. Enjoy your exclusive time in a refined space with carefully selected high-quality products.

Facilities and Equipment of Accommodation

  • The room
    The room
  • Restaurant
    Restaurant
  • Facilities & Services
    Facilities & Services

Basic Information

TaxesHot Spring Tax: JPY 150 per person Please pay on-site.
Card information
VISA / MASTER / JCB / AMEX
Pets
Not allowed
BreakfastJapanese-style breakfast: JPY 2,200 per person Supervised by the Executive Chef of our sister property, Tsuruya Ryokan
Your child
You can stay.
For children of elementary school age or younger, Child Sharing Existing Bedding is JPY 5,500; if extra bedding is required, the same rate as an adult applies.
Room service
Available for use
From 5:30 PM to 8:30 PM Drinks only (set courses are not available) *Please note that we may not be able to accommodate this during peak periods such as the New Year holidays.*
Common amenities
  • ○ Shampoo · conditioner
  • ○ Body soap · soap
  • ○ Towel · Bath towel
  • × Body towel · sponge
  • ○ Toothbrush set
  • ○ Comb · Brush
  • × Shower cap
  • ○ Hair dryer
  • ○ Shaving
  • × Shaving Gel/Foam
  • × Bath additives
  • ○ Yukata
  • × Nightwear
  • × Bathrobe
  • ○ Slippers
  • ○ facial cleanser
  • ○ Toner
  • ○ Lotion
  • ○ Makeup remover
  • × Cotton swab
  • × Cotton
  • ○ Clothing deodorizing spray
  • × Refrigerator
  • × Minibar
  • ○ Electric kettle
  • ○ Tea set (free)
  • ○ Television
  • ○ Safe
  • × Scale
  • × Trouser press
  • × Free morning edition
  • × Pay-per-view broadcast
  • × Satellite broadcasting
  • × Video on Demand
  • × Radio
  • × CD player
  • × DVD player
  • × Blu-ray player
  • × Speakers for portable audio
  • × In-room PCs and tablets
Facilities and Features
  • ○ Hot spring
  • ○ Rooms with open-air baths available
  • × Open-air bath
  • ○ Free-flowing hot spring
  • × Large public bath
  • × Private bath
  • × Sauna
  • × Ganbanyoku (rock bathing)
  • × Within a 5-minute walk from the station
  • × Within a 5-minute walk to the convenience store.
  • × Indoor pool
  • × Outdoor pool
  • × Pet-friendly
  • ○ Spa facility
  • × Fitness
  • ○ Free shuttle service
  • × Shuttle Service (Paid)
  • ○ Room service
  • × Room Service Available 24 Hours
  • × Barrier-free
  • × Childcare services
Esthetic Massage
Available
Opened in March 2025: “Esthetic Salon Sowaka” The only esthetic salon in Shima. Massage services are also available. We help relieve everyday fatigue such as eye strain and stiff shoulders.
Fitness gym
None
Room with Open-Air Bath
Hot spring
Available
Free-flowing
Available
Milky hot spring water
None
Additional Information
100% natural hot spring (Heating)
Remarks
The 1st-floor guestroom open-air Onsen bath is a “standing bath” that can be enjoyed either sitting or standing.
Spring quality and benefits

Calcium and sodium sulfate Onsen

Helps relieve fatigue, promotes healthy skin, and may ease gastrointestinal issues, neuralgia, skin conditions, minor abrasions and cuts, and atopic dermatitis.

※Regarding the notation of "Gensen Kakenagashi"
In some facilities, heating or adding water for temperature adjustment may be performed. Additionally, please note that in some parts of the facility, the hot spring water may not be free-flowing from the source. For more details, please contact each facility.

SaunaNone
Hot stone spaNone
Others[Check-in for Dinner-Included Plans] - Check-in is normally available until 5:00 PM. - If you will be checking in after 5:00 PM (late check-in), please contact the Facility in advance.

Reviews

Overall Score
4.20
Good (47)
  • Rooms & Amenities
    4.26
  • Facility
    3.89
  • Hospitality & Service
    4.04
  • Meals
    4.27
  • Onsen & Bath
    4.55
  • Satisfaction
    4.21

*Reviews that have been translated from Japanese.*

*Showing only reviews from 一休.com (Japanese) and Yahoo!トラベル.*

Access Information

Address
Gunma Prefecture4139-12 Shima, Nakanojo-machi, Agatsuma-gun
TEL:+81-279-26-7510

JR Agatsuma Line: 40 min by bus from Nakanojo Station to Shima Onsen → get off at the last stop, then a 15 min walk (Shuttle Service to the last bus stop available; Reservation required).

Parking Information
Fee
Free for guests
Parking time
Open 24 hours
Parking space
No restrictions
Number of parking spaces
10 cars available outdoor
Valet service
Unavailable
Four parking spaces are available free of charge in front of the property, and you may also use the free “Yuzuriha” parking lot about a 1-minute walk away.

Pickup and drop-off information
Available (Free)We offer a free Shuttle Service from the last bus stop in Shima Onsen to our property.
This service runs in three time slots. Please contact us at least 3 days in advance.
14:40/15:10/15:50

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