Vacation rentals in Sai River

[Hakuba/Uplands in September] Entire house for up to 12 people | 2 authentic saunas

Use Azumino and Ikeda-cho as your base in summer to enjoy the spectacular views of the Northern Alps. You can fully enjoy mountain sightseeing unique to this season, such as Kamikochi, the Tateyama-Kurobe Alpine Route, and Hakuba Happo Pond. From the second half of August to September, the summer bustle calms down, and it is a season when you can enjoy the quiet of Shinshu. During the day, go to the mountains and highlands, and at night, enjoy the tranquility of the countryside. This is a rental cottage where you can enjoy a sauna, BBQ, and the starry sky. As a base for sightseeing in Azumino, Hakuba, and Kamikochi, you can enjoy a comfortable stay for one night or for extended periods. Access to Hakuba, Kamikochi, and Tateyama-Kurobe is also good, and it can accommodate group trips, family trips, and long-term stays. With a washing machine and a bathroom dryer, it's also comfortable for extended stays. You can come by public transportation, but having a car is more convenient. Free pick-up and drop-off are available from Shinano-Matsukawa Station and Akashina Station. Other pick-up and drop-off services and sightseeing pick-up and drop-off services are available for 2,000-8,000 yen (round trip) depending on the distance, within 2 hours one way. For groups of 5 or more, please consult in advance because we can arrange a rental car. There are still openings on weekdays in September. It is also recommended for student trips in the latter half of summer vacation, as well as for couples and small groups.

Location · Family · Hospitality

ASAMA HIDEAWAY｜Hot spring with a direct flow from the source spring｜Sauna｜BBQ｜Entire house rental｜About 30 minutes by car from Karuizawa Station

NEW OPEN, July 2026!! ASAMA HIDEAWAY is a luxurious adult hideaway villa nestled at the foot of Mt. Asama, designed by architect Keisuke Kajitani. A special location surrounded by beautiful forests and the babbling of streams.As you step into the building with its modern, natural black tones, you will be greeted by the overwhelming sense of openness created by the high ceilings and the high-quality interior. The biggest attraction is the completely private spa area located right next to the creek that runs through the property. With a view of dynamic natural rock skin and deep greenery, the "semi open-air bath", and an authentic "sauna and water bath", you can ultimately spend a moment in mind and body. The luxurious outdoor living room is equipped with a BBQ grill and bioethanol fireplace.Enjoy a sophisticated space for adults where you can enjoy a BBQ amidst the fresh greenery during the day and be soothed by the flickering flames and the sound of the stream at night. Although it is in Kita-Karuizawa, which is easily accessible from Tokyo, it offers the richness of nature brought by Mt. Asama and an overwhelming silence isolated from the bustle of the city.Experience a time that sharpens your five senses, which can only be found here.

Family · Location · Amenities

Vacation Rental Feel the wind

Do you feel the breeze in a small cottage in the forest at the foot of Mt. Kurohime? Treat yourself, and spend time and wonderful memories with your friends, the people you like, or with your family and your pets. Spring Joetsu Takada Cherry Blossoms, Rape Flower Park in Iiyama City Water Activities on Lake Natsu-Nojiri 　　Go swimming to Joetsu 　　Challenge to climb Mt. Kurohime Autumn Foliage in Autumn Myoko Kogen Winter Kurohime, Myoko, Arai, etc. Ski & Snowboard 　　Lake Nojiri Wakasagi Fishing Year-round, family, and those who love... feel the breeze Please use it as if it were your own villa. *There is a crib for babies and a high chair for the table.Please let us know if you need it. * We have prepared a rental car (Delica D5 or Pagero Mini) for local transportation.Those who do not come by private vehicle, please use it.(You will be responsible for the fuel used) * The Legend of the Black Princess is a story of two people in love.Try staying here and think about the legend of the black princess. ※ A heart appears on the slope of Mt. Kurohime.Come and look for it on site.Depending on the day and where you look, the expression changes.Maybe the feelings of the two people in the legend of the Black Princess appeared in the heart...

Value · Location · Grill

Limited to one group per day, Mökki is a small cottage with a garden by a stream

Mökki means "cottage" in Finnish. Enjoy your time in a special place surrounded by nature. Guest house Mökki is located in Shinano-cho, which is blessed with forests, lakes, and snow in the northern part of Nagano Prefecture, and there are many natural places nearby such as Kurohime Kogen, Lake Nojiri, and Togakushi. Feel free to use the entire building, which has been renovated with natural materials such as cedar, cypress, and plaster, as well as the natural garden that creates seasonal scenery and the forest where the stream flows.You can see birds, squirrels, and martens in the forest, and you can enjoy walking around looking for wild vegetables and mushrooms, as well as swings and hammocks. We also paid attention to the interior of the room and kitchen utensils so that you can enjoy "living". At the pavilion by the stream, you can enjoy BBQs and campfires without worrying about the weather. In the green season, it is the perfect base for hiking, fishing, paddle boarding, and golf, and in the snow season, it is also the perfect base for winter sports. We also have a celebration cake service for guests celebrating birthdays and anniversaries.Please check with me in advanced.

Value · Location · Outdoor spaces

Sanchi, a private rental inn with a panoramic view of the Northern Alps

Enjoy a trip with a view you won't find anywhere else. The former town of Aka-Akashicho, located in the northeast of Azumino, Overlooking the Northern Alps, Here, you will find "beautiful views and tranquility that you will want to stay". We renovated such an old building in Akashina, Reviving it as a retro modern space, We have created an entire inn for rent. 5 minutes on foot from our facility to Akashina station, two stops to Matsumoto station on the Shinonoi line, sightseeing in Matsumoto, It is also easy to go to Nagano. Nagamineyama, Daio Wasabi, and the Shiratobi area are also close by, so please enjoy sightseeing in Azumino. The neighborhood is not downtown, so there is nothing. Recommended for those who are interested in living in the countryside and relocating to two areas, or those who are considering it. From 2026, there will be changes to how Airbnb displays prices, and the Nagano Prefecture accommodation tax will be implemented.
In the price breakdown, the guest service fee, applicable taxes, cleaning fee, etc. The price shown is all-inclusive.

Family · Location · Sleep quality

[Riverside House] A riverside villa in Karuizawa with a sauna and fireplace

We have renovated a villa along the river in the forest of Karuizawa. Great location is about 2,500 ㎡! Feel the extraordinary feeling of the garden and outdoor dining where you can run around, the living room has a large sofa and fireplace. The bathroom can also be enjoyed in the JAXSON jetted tub, a large sauna for 4 people in the metos, and a rain shower in the water bath. It is a renovated old villa in a natural environment.Please note in advance before making your reservation that insects may enter the room during your stay.If you have excessive allergies to insects, etc., please avoid booking.

Location · Family · Amenities

Capsule House-K, a monumental capsule house in nature designed by Kisho Kurokawa

CAPUSULE HOUSE-K is a private house designed by Kisho Kurokawa. It was created based on the concepts of Metabolism and Homo Mobius. This building is composed of the same capsules as the Chugin Capsule Tower Building, which is also a metabolism building, and was completed in 1973, the year after the building was completed. Until now, it has been open only to a few people and was a little-known building, but in 2019, the restoration was started by Kisho Kurokawa's son, and now it is open to the public with the interior of that time.

Location · Value · Checkout

Forest sauna hideaway — where stillness is luxury

Break Free, Find Mindfulness: Discover healing tranquility at Soil. • Tranquil chalet in Okumisora-no, Hakuba Village • Peaceful ambiance & stunning forest views through large windows • Japanese craftsmanship in owner's selected furniture & tableware • Ideal remote work space with monitor & printer • Blissful relaxation: fire pit, sauna & hinoki wood bath • 1-min walk to Hotel Oak Forest's hot springs & restaurant and shuttle bus stop • Walking distance to popular Echoland restaurants and bars.

Location · Value · Hiking

tiny cabin Nagano - Serene retreat / Snow Monkey

✨ Discover the perfect blend of modern design and serene nature in this charming, cozy cabin nestled in the forests of Nagano. Redesigned by a renowned Nagano-based interior designer as a model home, this cabin offers a unique stay with stylish interiors. Whether you’re seeking tranquility, ❄️skiing Nagano’s famous powder snow (just a 15-min. drive), or visiting historic shrines (30 min.), this cabin has it all. For outdoor enthusiasts, a camping and lake activity center is just 5 minutes away!✨

Location · Family · Skiing

Modern Luxury, Classic Style, Onsen Nearby

Nestled in the mountains of Nagano at an elevation of 860 meters (2,821 feet), this is a luxury home exclusively for those who want to escape tourist traps, experience a side of Japan rarely seen by outsiders, and do it in style. Our 3-bedroom home is 200 sq. meters (2153 sq. feet) large and is a marriage between traditional Japanese architecture and modern technology and comfort. The home is accessible from Tokyo and other major cities via the Shinkansen bullet train or Joshin-etsu Expressway.

Location · Family · Layout

Japanese Country Guest House "Tsuzune no mori"

*PLEASE SEE SECTION BELOW* Located in north-middle Nagano, Omi is a beautiful and quiet small village. Filled with beautiful landscapes of Japanese farming lands and mountains which are enjoyable throughout the seasons. Our 130 year-old traditional Japanese house has been renovated for your comfort while holding onto its history. Renewed as a duplex house! You have almost the entire 1st&2nd floors of the west side of the house. Limited to one group per day. Please see below about the house.

Location · Family · Sleep quality

Sanson Terrace "House of Waltz" in rural Nagano

The Mochizuki district of Saku City, where "House of Waltz" is located, is known as Village of Horses and has long been a horse ranch where people and horses have a close relationship. To express our respect for these culture and history, we renovated a wooden house that offers a view of the horses spending time at a Equestrian Park. Within walking distance, you can visit Kasuga Onsen, boasting over 300 years of history and high-quality hot springs, a Equestrian Park, a tranquil park in nature.

Location · Value · Hospitality