Overview
Stay high above the Chikuma River at Nunobiki Onsen Komoro, where broad views stretch towards Mount Asama and the surrounding mountain range. The elevated setting gives you open skies, changing seasonal scenery, and a quieter base for exploring Komoro, Karuizawa, and eastern Nagano.
Natural hot spring water, local Shinshu cooking, spacious rooms, detached suites, and forest cabins let you shape the stay around the experience you prefer. You can choose a traditional Japanese room, enjoy a private open-air bath, spend time in your own sauna, or sleep in a cabin surrounded by birdsong and trees.
The name Nunobiki connects you with the legend of “being led by a cow to Zenkoji,” which begins at nearby Nunobiki Kannon. After exploring the historic temple, Komoro Castle Ruins, local wineries, or the Mount Asama highlands, you can return for an outdoor soak overlooking the landscape.
Accommodation
Choose from Japanese rooms, Western rooms, Japanese-Western rooms, large suites, detached accommodation with private saunas, forest cabins, and an accessible room. Views differ between categories, with selected rooms facing Mount Asama and others facing the parking side of the building.
Kurenai and Akatsuki are spacious Japanese-Western suites with private open-air baths and large windows overlooking Mount Asama. Kurenai measures 85 square metres and includes beds, a sofa bed, futon bedding, a generous living area, and separate bathing spaces. Akatsuki measures 72 square metres and combines beds, futons, a sitting area, and a private outdoor bath with morning views towards the mountain.
The Junior Suites give you more space without a private outdoor bath. Takamine is a 48-square-metre Western suite with several beds and a sitting area, while Asama is a 70-square-metre Japanese-Western suite with beds, futon bedding, and broad Mount Asama views.
For greater privacy, choose the detached Nunobiki-an suite. You can look across Mount Asama and enjoy a private garden that fills with cherry blossoms during spring. Inside, you have Simmons beds, a living area, kitchen, microwave, and private sauna. Your private open-air bath receives natural Nunobiki Onsen water, allowing you to soak without leaving the suite.
Kokage-an consists of two independent forest suites named Mori and Kaze. Each includes a private sauna, outdoor deck, cold-water bath, living and dining space, kitchenette, and separate bathroom and toilet. These suites give you a private sauna retreat among the trees, although the bathing setup differs from the natural hot spring bath in Nunobiki-an.
The standalone cabins measure approximately 28 square metres and include a double bed, two loft spaces, climate control, and a private deck. You can use the dedicated bathroom and toilet building a few steps away and walk for around two minutes to reach the main natural hot spring baths. Selected cabins welcome dogs, while the remaining cabins are pet-free.
Traditional Japanese rooms offer eight, nine, ten, 12, or 18 tatami mats with futon bedding. Selected Japanese rooms face Mount Asama, while the nine- and 12-tatami categories face the parking side. Western and Japanese-Western rooms are also available, including a 20-tatami mixed-style layout.
The accessible room sits on the first floor close to reception and the shop. It includes a private bathroom, Washlet toilet, individual climate control, air purifier, refrigerator, Wi-Fi, and space suitable for wheelchair use.
Your room includes a television, kettle, tea set, refrigerator, individual heating and air conditioning, safe, air purifier, Washlet toilet, yukata, slippers, towels, toothbrushes, razors, shower caps, and hair-care items. All indoor accommodation is non-smoking.
Dining
Dinner focuses on seasonal ingredients from Shinshu and nearby regions, prepared as a Japanese set meal in the dining area. Local sourcing shapes the menu, allowing you to taste Nagano vegetables, mushrooms, river fish, meat, rice, pickles, and regional specialities.
Your main course may feature barley-fed pork shabu-shabu or a Hokuriku seafood hot pot. The pork has a gentle sweetness and is served with Shinshu mushrooms and vegetables in a seasoned broth. The seafood hot pot brings together seasonal fish and shellfish from the Sea of Japan with vegetables, mushrooms, and an ishiru fish-sauce broth. Selected plans may feature Saku carp fishball hot pot instead.
The accompanying courses change with the season. Dinner may include broad-bean tofu with yuba and salmon roe, fried ebi-imo, iwana and nozawana sushi, lightly seared Shinshu salmon, kanpachi and tuna sashimi, or Shinshu Fukumi chicken simmered with vegetables.
Rice may be cooked in a small pot with Shinshu salmon and Koshihikari rice from Tateshina. A vegetable-rich clear soup and house-made rice-bran pickles complete the meal.
Breakfast is a Japanese set meal made with ingredients from Shinshu. You can begin the morning with rice, soup, grilled or simmered dishes, vegetables, pickles, and small seasonal plates.
Breakfast is served from 7:00 to 9:00, while dinner is available from 18:00 to 21:00. Both meals are served in the dining area rather than inside your room.
Onsen and Wellness
Nunobiki Onsen water flows into spacious indoor and open-air baths overlooking Mount Asama, the Asama mountain range, and the town of Komoro. The outdoor bath uses natural stone and opens towards the wide mountain landscape, giving you a different view during fresh spring greenery, summer, autumn colour, winter snow, and clear evening skies.
The indoor bathing area includes two pools kept at different temperatures. You can choose the warmer bath or spend longer in the milder water before stepping outside.
The spring comes from Nunobiki No. 2 Source and is classified as a sodium chloride spring with weakly hypertonic and weakly alkaline qualities. Its pH of 8.33 gives the water a smooth feel and can gently soften the surface of your skin.
Chloride and sodium help reduce heat loss after bathing, allowing your body to remain warm once you leave the water. Bicarbonate ions contribute to the smooth after-bath feel, while naturally occurring metasilicic acid supports skin moisture. The water has little sulphur scent and feels gentle enough for a slower soak.
The spring is traditionally associated with easing fatigue, joint and muscle discomfort, lower-back discomfort, nerve discomfort, sensitivity to cold, stiffness, minor cuts, and dry skin.
When you stay overnight, you can use the shared baths from 6:00 to 9:00 and from 12:00 to 23:00. Shampoo, conditioner, body soap, hair dryers, tissues, cotton swabs, and paper hand towels are available in the bathing areas.
The shared bathing area does not include a sauna. Private saunas are reserved for selected special accommodation, including Nunobiki-an and the Kokage-an suites.
Guests with Tattoos
You can use the shared indoor and open-air baths when every tattoo remains fully covered with a towel.
When your tattoos cannot remain fully covered, choose accommodation with private bathing. Nunobiki-an includes a private open-air bath supplied with natural Nunobiki Onsen water. Kurenai and Akatsuki also include private open-air baths, while selected detached suites provide private saunas and bathing spaces.
Facilities
You can use free Wi-Fi in your room and around the property. The first-floor lobby includes drink vending machines, and the on-site shop carries local items and souvenirs. Luggage storage is available before check-in and after check-out, and you can also send or receive luggage through the property.
Four meeting and event rooms support retreats, seminars, celebrations, and group gatherings. Shirakaba and Kusabue follow Western-style layouts, while Chikuma and Nunobiki provide Japanese tatami spaces. Projectors, screens, tables, chairs, and microphones are available for organised events.
Wheelchair access is supported through the first-floor accessible room, a wheelchair-friendly toilet, loan wheelchairs, and handrails in the shared bath. There is no coin laundry, but nearby laundry facilities can be introduced when needed.
Free outdoor parking is available on a first-come basis. The property is non-smoking indoors, with a designated smoking space outside the entrance.
Activities
Visit Nunobiki Kannon, around five minutes away by car. A forest path and stone steps lead towards the temple buildings set against a dramatic cliff. This is the setting of the well-known legend that gave Nunobiki its name, and viewpoints around the temple extend towards Mount Asama.
Komoro Castle Ruins Kaikoen Park is around 20 minutes away by car. You can walk among historic stone walls, seasonal gardens, museums, and cultural sites connected with the former castle town. Spring brings cherry blossoms, while autumn colours the park with red and gold leaves.
For a taste of the region’s drinks, visit Komoro Distillery or Manns Wines Komoro Winery. You can learn about whisky or wine production while exploring the landscape and climate that influence each drink.
During the fruit season, Komoro Nunobiki Strawberry Farm gives you a chance to pick and eat strawberries in covered growing areas. The raised planting beds make it easy to move between the rows.
For mountain scenery and winter sports, drive towards Takamine Mountain Park on the slopes above Komoro. The highland area offers skiing during winter and access to mountain views, hiking, and cooler air during the warmer months.
Back at Nunobiki Onsen Komoro, you can spend time on your cabin deck, enjoy a private sauna, walk through the surrounding grounds, or return to the open-air bath as the light changes over Mount Asama.
Additional Features
Check-in begins at 15:00, and check-out is by 10:00. You can store luggage at reception before your room is ready or after you check out.
A complimentary reservation-only shuttle connects JR Komoro Station with Nunobiki Onsen Komoro. Afternoon services bring you to the property, while morning services return to the station. The journey by car takes around ten minutes.
Free parking is available for 91 vehicles. Payment options include cash, supported credit cards, and PayPay.
Dogs can stay only in the designated pet-friendly cabins. All other rooms and indoor shared spaces remain pet-free.
