Overview
Stay beside the clear Shima River at Shima Yamaguchikan, a traditional hot spring ryokan surrounded by the wooded mountains of Gunma. The riverside setting shapes your entire stay, from the sound of flowing water outside the open-air baths to the changing forest views from the rooms and lounges.
Inside, the building takes inspiration from a nostalgic Japanese town called Tawara-machi. Each floor is treated as a town district, while painted lanterns, an old red postbox, shopfront-style spaces, and a central square create the feeling of walking through a Showa-era festival street.
You can spend your time bathing beside the river, enjoying seasonal Gunma cuisine, listening to the landlady’s evening picture-card storytelling, or exploring the blue lakes, waterfalls, public baths, and historic buildings of Shima Onsen. The Yamaguchi bus stop stands directly outside, giving you straightforward access from Nakanojo Station without a private shuttle.
Accommodation
You can choose from traditional Japanese rooms, tatami rooms with beds, compact Western rooms, and upper-floor accommodation with private free-flowing onsen baths. Most Japanese rooms face the Shima River, while the Western rooms face the mountain side and do not provide the same open scenery.
The 12-tatami Japanese corner room gives you a spacious traditional layout with futon bedding and large windows overlooking the river and surrounding forest. This room suits you when you want extra floor space and a broad natural view.
The standard ten-tatami Japanese rooms also face the Shima River. You can choose a room with an engawa-style window area or one with a sunken kotatsu, giving you a warm place to sit with your legs beneath the table during colder months.
The Japanese Bed Room combines a tatami setting with two single beds and a sunken kotatsu. Large windows face the river, allowing you to enjoy a Japanese atmosphere without sleeping on a futon.
The compact Western rooms come with either twin semi-double beds or one double bed. These rooms sit on the mountain side and do not have a scenic view, making them a simpler choice when your priority is bathing, dining, and exploring rather than spending long periods in your room.
For private natural hot spring bathing, choose one of the special upper-floor rooms. Mebuki and Soyokaze sit on the seventh floor facing the Shima River. Each room combines a 15-tatami Japanese area, a twin bedroom, a wide window-side sitting space, and a cypress semi-open-air bath filled with free-flowing source water. You can use the bath at any time during your stay.
Kusabue sits on the mountain side of the seventh floor and combines a Japanese room, living area, twin bedroom, cypress open-air onsen bath, and indoor bath. This room gives you more privacy and separate spaces for sleeping, bathing, and relaxing.
Kunpu and Kinmokusei occupy the top floor and face the Shima River. Both rooms include twin beds, an observation terrace, an indoor bath, and an outdoor bath supplied with free-flowing natural spring water. You can watch the mountains and river during the day or look towards the night sky from your private terrace.
Your room includes complimentary Wi-Fi, yukata, towels, a hairdryer, tea-making equipment, a refrigerator, television, safe, slippers, and a private wash area. The special onsen rooms also include bathrobes, coffee equipment, and hot spring skincare products. Every room is non-smoking.
Dining
Dinner follows a seasonal Japanese kaiseki style, with a focus on ingredients grown or produced in Gunma. Highland vegetables, regional meat, freshwater fish, mushrooms, and seasonal produce appear in carefully arranged courses that change throughout the year.
Your meal may move from small starters and sashimi to grilled, simmered, and hot dishes, followed by rice, soup, pickles, and dessert. The exact menu changes with the season and ingredient supply. Additional dishes may include salt-grilled river fish, horse sashimi, Jōshū pork, tempura, sashimi, or Jōshū beef cooked on a ceramic plate.
When you stay in a special room with a private free-flowing onsen bath, dinner and breakfast are served at Tani no Chaya. This dining area uses partitions between tables to give you a more private setting, with the sound of the river nearby.
Standard room plans normally include meals at Dining Shunrei or Hachinosuke Chaya. Both dining rooms use chairs and tables, so you do not need to sit on the floor. Dinner is not normally served inside your room.
Breakfast also focuses on seasonal ingredients and local flavours. It is served in your assigned dining area and gives you a balanced Japanese start before another bath or a day exploring Shima Onsen.
Children’s meals are available, with familiar dishes such as a hamburger steak, fried prawns, potatoes, chicken rice, and dessert. Visible allergy ingredients can be adjusted when you submit the required information at least three days before arrival, although all food is prepared in shared kitchen areas.
Onsen and Wellness
Shima Yamaguchikan gives you three main bathing areas: Odaimoku Large Open-Air Bath, Shima River Open-Air Bath, and Yakushi no Yu. The two riverside outdoor areas change between men and women according to the time, allowing you to experience both when you bathe in the afternoon and again later in the evening or the following morning.
The natural water is classified as a sulfate spring and emerges at approximately 50°C to 58°C. It is clear and gentle against the skin. The spring has traditionally been associated with recovery from fatigue, muscle and joint discomfort, minor skin concerns, and certain digestive conditions.
Odaimoku Large Open-Air Bath is built around a huge riverside rock carved with a Buddhist inscription. The rock helped redirect floodwater away from the property in the past, and the inscription expresses gratitude for its protection. At night, lights illuminate the river and surrounding landscape.
Women normally use Odaimoku Large Open-Air Bath from 12:00 to 19:00, while men use it from 19:30 until 9:00 the following morning. Reaching the bath requires you to take the observation lift to the second floor and then walk down a flight of stairs.
Shima River Open-Air Bath places three tubs beside the water. Wooden beams, stone, tatami-room details, and the sound of the river create the feeling of bathing inside a traditional Japanese house opened towards the valley. The river is also illuminated after dark.
Men normally use Shima River Open-Air Bath from 12:00 to 19:00, while women use it from 19:30 until 9:00 the following morning.
Yakushi no Yu provides separate bathing spaces for men and women and normally opens from 15:00 until 10:00 the following morning. A small shrine honours Yakushi Nyorai, the Buddhist figure traditionally connected with healing and medicine.
A drinking-water station beside Yakushi no Yu lets you taste the natural spring. Drink slowly rather than taking a large amount at once, with approximately one small cup recommended.
The route to the bathing areas follows Yukemuri-dori, a passage where you can hear the river, birds, and mountain wind as steam rises around the walkway.
There is no sauna or reservable private bath. The former private bathing facilities closed in November 2022 and were converted into rooms with outdoor hot spring baths. For a private onsen experience, you need to reserve one of the designated upper-floor rooms with its own natural spring bath.
If You Have Tattoos
If you have tattoos, you cannot use Odaimoku Large Open-Air Bath, Shima River Open-Air Bath, Yakushi no Yu, or the communal changing areas.
There is no private bath that you can reserve after arrival. To enjoy the natural spring in privacy, choose Mebuki, Soyokaze, Kusabue, Kunpu, or Kinmokusei. Each of these rooms includes its own free-flowing hot spring bath, allowing you to bathe without entering the shared facilities.
Facilities
Shima Yamaguchikan treats its interior as a nostalgic town called Tawara-machi. On the main lobby floor, you will find the front desk, a large lobby overlooking the waterfall across the river, the Enkiya souvenir shop, Tawara-machi Square, Izakaya Ginzo, Café Mayu no Hana, and designated smoking spaces.
Enkiya carries regional food, Gunma sake, Japanese accessories, children’s toys, local souvenirs, and original hot spring skincare products developed for the property. Tawara-machi Square hosts the landlady’s picture-card storytelling and other seasonal performances when scheduled.
Izakaya Ginzo serves drinks, small dishes, and late-evening food on selected nights. Café Mayu no Hana provides coffee and a quiet place to sit near the lobby, with windows looking towards the changing mountain scenery. A microwave is also available inside the café.
Bar Madonna provides karaoke for reserved groups, while the Tsukimidai Lounges on the third and seventh floors remain open throughout the day and night. You can stop here after bathing to listen to the river and feel the mountain air.
Dining Shunrei, Hachinosuke Chaya, Tani no Chaya, private dining rooms, and small banquet halls provide spaces for meals and organised gatherings. Complimentary Wi-Fi is available in the rooms, and free parking is provided when you arrive by car.
Wheelchairs, indoor baby strollers, infant bedding, and bathing chairs can be borrowed in limited numbers. An accessible toilet is available on the main entrance floor. Smoking is limited to designated rooms because all accommodation and other indoor areas are non-smoking.
Activities
Begin your evening in Tawara-machi Square, where the landlady normally presents one picture-card story from 19:00. The stories range from humorous local tales to ghost stories. The event does not require a reservation, although it may be cancelled when she is away.
During selected summer Fridays, you can join a lantern walk through Shima Onsen. The walk begins outside the property and follows the hot spring town after dark. Reserve your place at the front desk before the same-day deadline, and remember that the event does not take place during rain.
Take a walk through the central hot spring district to see old wooden buildings, cafés, small shops, public bathing spaces, and Sekizenkan. Its historic main building dates from the 17th century and is recognised as an important example of early Japanese hot spring accommodation.
Farther into the valley, Oku-Shima Lake is known for the clear blue colour called Shima Blue. The road around the lake forms a circuit of approximately four kilometres, with observation areas and waterside scenery along the route. The colour changes with the light, season, and weather, and it is often especially vivid during the spring snowmelt.
You can also enjoy canoeing on Oku-Shima Lake when seasonal tours operate. Other nearby places include Hinatami Yakushido temple, the traditional Muso no Yu public bath, Maya Falls, Koizumi Falls, and Oizumi Falls.
Back inside, you can browse the shop, enjoy coffee beside the lobby windows, listen to the river from Tsukimidai Lounge, or return to the hot spring baths as the light and bathing assignments change.
Additional Features
The Yamaguchi bus stop stands directly in front of the property. The local Shima Onsen bus takes approximately 40 minutes from Nakanojo Station, while a taxi normally takes around 25 minutes. A reservation-based highway bus also connects the Shima Onsen area directly with Tokyo.
A private station shuttle is not provided. Free on-site parking is available when you travel by car.
Complimentary Wi-Fi is available in every room. Yukata, towels, bath towels, tea-making items, toiletries, slippers, and a private wash area are included according to your room category. All accommodation is non-smoking, with smoking permitted only inside the designated smoking spaces.
