Newly built villa in Karuizawa
Luxury villa Karuizawa SECOND-BASE
Topics -Feature articles-
One-sloped roof house Kariyado V-③
Oiwake Higashi area
[New property] 150 million yen
This residence was designed with "white space" as its key concept, allowing residents to feel close to the nature of Karuizawa and freely enjoy hobbies and relaxation. The simple, flowing form of the single-pitch roof allows the sky and breeze to shine through, creating a sense of openness within the interior. The exterior is finished in a modern white design that blends seamlessly with the nature of Karuizawa, while the entrance is finished with richly textured tiles, creating a striking presence with a contrasting texture. The spacious earthen floor salon and wooden deck gently connect to the garden. The earthen floor salon is a place where you can enjoy hobbies with your shoes on, let your dog run around, and chat casually with friends. Every day begins and ends here. Experience the nature of Karuizawa firsthand and enjoy a luxurious daily life where a free and relaxed lifestyle blends seamlessly into your everyday life.
Completion date: End of December 2025
"A house that reflects the scenery"
Narusawa House II Prince Narusawa Area
[Construction underway] 320 million yen
With the theme of "a residence that reflects the scenery," we designed a home where you can spend a fulfilling time surrounded by nature throughout the four seasons, while overlooking the majestic Mount Asama.
The shed roof and large glass walls enhance the exterior, and soft sunlight pours in through the large south-facing windows, creating a spacious and open space together with the atrium. On the second floor, there is a theater room with a panoramic view of Mount Asama. Enjoying movies on the large screen and the magnificent view outside the window creates a special moment that can only be experienced here. Furthermore, there is a garage for your beloved car and a terrace where you can spend time surrounded by nature, making this a residence that fulfills the high-quality lifestyle in Karuizawa.
Completion date: Late July 2026
Overlooking the view,
A house that captures the passage of time
"House with a View" Minamihara area
[Construction underway ] 650 million yen
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Architecture that stands in the forest and blends in with the environment. Spatial design that incorporates the scenery. Craftsmanship that transforms space into art. Materials and techniques that breathe life into the local climate. Garden design that depicts coexistence with nature. A top-notch residence will be born in Minamihara.
Completion date: November 2025
Wind and Sun Terrace House
Tsukushigaoka Oiwake/Karishuku area
[Construction underway] 125 million yen
We created a home that sprinkles time spent in harmony with nature into everyday life. Each room is positioned on the south side, and the space is designed so that the interiors are bathed in sunlight. The deck terrace that continues from the earthen floor salon is a place that feels like a second living room. An outdoor kitchen has also been planned, making it easy to enjoy BBQs and bonfires. By linking the outdoor kitchen with relaxing moments reading in the afternoon or gazing up at the sky, outdoor living becomes a part of everyday life. The balcony, which accents the exterior, has overlapping horizontal lines that add depth and expression to the exterior.
Completion date: End of December 2025
Villa in the forest Minamigaoka House III
Minamigaoka area
[Construction underway] 210 million yen
Inspired by the larch and fir tree-lined streets that characterize Minamigaoka villa area, we created a residence that incorporates the rich natural beauty of the area into the interior. The open-ceiling space dynamically displays the beams and pillars, expressing the gaps and spaces created by the trees in nature inside the home.
Taking advantage of the difference in elevation of the land and incorporating a split floor, we created a three-dimensional sense of spaciousness and unity with nature within the interior.
Minami-ga-oka, about a 5-minute drive from Karuizawa Station, is a tranquil brand villa area surrounded by rows of larch and fir trees.
Completion date: December 2025
Stone-clad and shed roof house
Uenohara II Uenohara Villa Area
[The contract has been concluded]
Based on the concept of a "hideaway enveloped in tranquility," we created a residence that blends seamlessly into the lush nature of Kaminohara, where you can forget about your daily routine and enjoy a spiritually enriching, extraordinary experience. The exterior features a low-profile, single-pitch roof, creating a design that harmonizes with the surrounding greenery while still making a statement. The south-facing side features a large opening and atrium, allowing soft light to stream into the interior, allowing you to fully experience the nature of the four seasons. There is also a garage large enough to comfortably store your beloved car. This will be a great base for enjoying drives and outdoor activities in Karuizawa, allowing you to carefully store that special vehicle.
Stepping outside the earthen floor salon, you will find yourself on a terrace bathed in sunlight filtering through the trees, creating a home where you can enjoy a peaceful moment while feeling the breath of nature.
Completed in September 2025
A house of wind and light
Minamihara House I-B Minamihara Area
[The contract has been concluded]
Located at the entrance to Minamihara Villa Area, a popular luxury villa area, this 500m2 site incorporates wood grain patterns on the exterior walls, creating a modern feel that blends in with the rich nature of Karuizawa. We created a residence where the wind and light that reflects the beautiful changing seasons of Karuizawa circulates. The open living/dining/kitchen area has an open atrium of about 24 tatami mats. The space is designed so that sunlight pours in from the large windows on the south side, enveloping the entire room. The sunlight creates different shadows depending on the time of day, bringing a rich color to the living space.
Expected completion date: Mid-October 2025
Moss Garden House
Shirakabadai I Minamigaoka area
[The contract has been concluded]
This home completely embraces the moss-covered stone wall beneath the large maple tree. The dining room, located in the atrium, is seamlessly connected to the living room with its wide windows overlooking the stone wall, the earthen floor salon that opens onto the stone wall and garden, and the kitchen, where the stone wall, seen through the dining room, appears carved out like a sculpture.
The outside is enclosed by exterior walls and stone walls, and we planned to create a garden that is open yet calm and tranquil. In summer, you can spend time in the garden surrounded by the lush shade of maple leaves and the moss-covered stone walls, and in winter, you can calmly and quietly gaze upon the stone walls standing in the light of snow. By incorporating the ever-changing expressions of the stone walls into the home, we created a home where the place and comfort changes with the seasons.
Expected completion date: End of November 2025
Karuizawa resort style design
One-story house [Hikari no Ie]
Oiwake Higashi area
[The contract has been concluded]
To help you enjoy a more active lifestyle in Karuizawa, we created a single-story residence that embraces the changing of nature, with "sunshine" as the key concept. The earthen floor and kitchen are on one floor, with no separation between them. By installing a large window on the south side, abundant natural light fills the room, and the space is designed so that the beautiful scenery outside feels like part of the living room. Why not spend your days in this special place, gazing at the view outside in the sunshine with a cup of coffee, or relaxing on the earthen floor with family and close friends, enjoying the changing seasons?
Completion: End of July 2025
A modern Japanese residence surrounded by beautiful greenery and autumn foliage
"Garden House" Uenohara area
[The contract has been concluded ]
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Looking outside from the large atrium-style doma salon and living room, you can "enjoy the changing seasons." The indoor space is designed with a Japanese modern theme, making abundant use of natural materials. Why not step out from the doma salon onto the terrace, where the sunlight filters through the trees, and spend some quality time with your family or close friends?
Completion: End of May 2025
The solid stonework and wood are in harmony.
A modern residence nestled in the forest
"Koyama House" West of the Riyama area
[The contract has been concluded ]
A stylish residence with a garage where solid stone and wood are in harmony. "A home that creates a fulfilling life" The living room, earthen floor salon, and atrium suggest open vertical and horizontal connections. The earthen floor salon is located in a sunny, family-friendly place, and can be accessed from the deck, which can be used for BBQ or as a cafe terrace. A modern residence nestled in the forest is born, where you can enjoy the four seasons of Karuizawa and live your daily life to the fullest.
Completion: End of December 2024
Karuizawa Old Karuizawa House
Mampei hotel area
【Contract concluded】
This is a luxury villa with a living room on the second floor, which is conveniently located in historic Kyu-Karuizawa, just a 5-minute walk from Mampei Hotel, and is designed to allow you to enjoy the scenery of each season. It is a high-quality space with a design that utilizes natural materials such as natural wood and diatomaceous earth, and a kitchen for parties.
Completed in March 2022
Upcoming properties
Narusawa House II
Narusawa and Minamikaruizawa area
[ Scheduled for completion at the end of May 2026 ]
Located just five minutes from the Shinkansen (bullet train) station, this popular area offers convenient living while still enjoying nature. This terraced house features a two-car inner garage and a spacious wooden deck connected to the living room and earthen floor salon. Enjoy life in Karuizawa with a view of Mount Asama to the north.
Villa in the Forest Uenohara I
Nakakaruizawa and Kaminohara villa area
[ Scheduled for completion at the end of July 2026 ]
The second newly built villa in the popular Kaminohara area! With a view of Mount Asama to the north, the open living space and earthen-floored salon will add a touch of glamour to your villa life in Karuizawa.
Enjoy a BBQ with your family and friends in the garden overlooking Mount Asama, or spend the time in Karuizawa with your beloved dog.
Forest Residence Seseragi Village Sengataki Area
[ Scheduled for completion at the end of July 2026 ]
Seseragi no Sato in the Sengataki area, a popular villa area nestled in a quiet forest. Enjoy the leisurely flow of time while feeling the nature and enjoying the elegant life of Karuizawa. Enjoy an extraordinary space with your precious family and friends. A beautiful mansion is completed with a stately garage design and a sharp design of a single-slope house.
PROJECT
-Subdivision-
For those considering building a custom-built villa, we have the latest information on land that can be built immediately.
We will introduce you to the best land to realize Karuizawa life.
Asamadai
[Under negotiation]
Spacious 1120m2 plot with a view of Mt. Asama
Nakakaruizawa Toriibara area
[Under negotiation]
A rare property in the Nakakaruizawa area. Available for use as a store.
Prince Narusawa Area [South Section]
Popular Narusawa area 300 tsubo
Miyota Town Shiono area
[3 new plots]
Newly developed condominium complex with a great view of Mt. Asama and Mt. Yatsugatake
Newly built housing/sale land MAP
Karuizawa villa construction/custom housing
A newly built villa with high quality carefully selected materials, design, and performance.
A dirt floor salon where you can expand your life
Enrich your life in Shinshu Karuizawa
It is important that the living space is open not only to the inside of the house, but also to the outside, where nature is abundant. "Doma Salon" is a proposal for a comfortable space that skillfully connects the indoors and outdoors. The dining and living room floors have been lowered to be flat with the outdoor terrace, making this a space where you can walk up with your shoes on. It is a special place like never before, with plenty of sunlight outside and a pleasant breeze blowing.
The beauty of natural wood and natural materials
Made of solid wood from Nagano Prefecture
Shinshu is a country of mountains and forests. It is obvious that building a house with wood grown in the local climate makes sense and will make the house last longer. As a housing company with deep roots in the community, we have been dedicated to building houses using materials from Nagano Prefecture since 2000. By forming a group with local sawmills and mountain workers, we have established a joint venture that is unprecedented in the country as an integrated timber production system, making it possible to use 85% local timber in all buildings. We deliver healthy and warm homes using high-quality wood grown in the climate of Shinshu.
Airpass solar construction method
Prevents moisture and freezing, creating a comfortable environment that is cool in summer and warm in winter.
A passive solar house where you can live comfortably in spring, summer, fall and winter while coexisting with nature. A house built using the Airpass solar construction method is an ingenious way to effectively utilize Shinshu's natural energy in your home without relying on excessive heating and cooling equipment. You can change the appearance of your home by opening and closing the ventilation holes, and in winter you can enjoy a sunny space with soft solid wood floors and the warmth of the sun on your bare feet. In the summer, you can escape the humid heat and let in cool air from under the floor, making it as refreshing as under the shade of a tree. Coupled with the effect of painted walls that control humidity, we are proud of the clean air that makes you want to take a deep breath.
For more information, please see the Kobo Shinshu’s House homepage.
https://www.kobo-shinshu.com/
In Karuizawa, “sun exposure” and “humidity measures” are important.
Life at an altitude of 1,000m
“Sunlight” is very important.
By having good sunlight, you can protect yourself from the humidity in the summer and the cold in the winter, which are unique to Karuizawa. We offer clean homes that allow moisture to escape and are mold-free, and warm homes that don't rely too much on daytime heating during the winter.
Explaining the key points to creating a "home filled with wind and light"!
Karuizawa's winter weather rate is 90%!
Thanks to the location and floor plan that efficiently take in sunlight, you can enjoy a warm winter life in Karuizawa even without heating during the day.
The dense forest is
Ventilation is also poor.
In the dense forest, the sunlight does not reach,
Heating is necessary during the spring, autumn, and winter, day and night.
In the summer, there is poor ventilation, making it easy for mold to grow.
The annual average humidity in Karuizawa is 80%! ?
The annual average humidity in Karuizawa is over 80%. Especially from June to October, the humidity is high, making it easy for mold to grow. This season's villa area is
There may also be a musty smell coming from somewhere.
That's why it is essential to take measures to prevent moisture and mold in your home.
In the humid Karuizawa
“Airpass solar construction method”
is suitable
It utilizes solar heat to create airflow within the wall. In the summer, it expels hot air and moisture outside, and is effective in preventing mold and condensation.With an Airpass home, you can rest assured even when you are away for a long period of time! !
Protects asset value over the long term.
Summer “cool like the shade of a tree”
Open the attic/underfloor ventilation.
・Cold air is taken in from the ventilation opening under the floor.
・Hot air is discharged from the attic along with the rising air currents generated in the ventilation layer.
- Releases heat and moisture, creating a crisp and comfortable living environment.
Winter “warm like sunshine”
Close the attic and underfloor ventilation.
・Solar heat warms the air inside the roof and walls.
- Air circulates within the walls, delivering warmth throughout the home.
- Flowing air suppresses moisture and prevents condensation.
1400 buildings so far,Nagano prefecture timber housingNo1 track record
Specialized home construction created by “Kobo Shinshu no Ie”
Let's go back to Shinshu's tree house
Wooden custom-built house “Kobo Shinshu’s House”
We have been working on building houses using materials from Nagano Prefecture for over 20 years, and thanks to you, we have built over 1,400 houses..We build more than 100 houses a year, and with our extensive experience and technology, we are the number one in the area for custom-made prefectural timber houses, and will help you build your home.
We have 6 locations in the prefecture and 11 housing exhibition halls and model homes, and we respond to customer requests throughout Nagano Prefecture by proposing a variety of design concepts.
For more information, please see the Kobo Shinshu’s House homepage.
https://www.kobo-shinshu.com/
“Real wooden houses” built by a housing company with roots in the community that has been in business for 63 years.
Over 85% of local materials are used.
Focused on organic
A house that makes you want to take a deep breath
Through over 20 years of efforts to build houses using materials from Nagano Prefecture,
By forming a group with local sawmills and mountain workers and establishing an integrated timber production system, we are able to provide a stable supply of high-quality timber.
The main structure uses 100% Nagano-produced wood, and the entire building uses over 85% Nagano-produced wood.
The rest of the house is made with 100% domestic materials, using only high-quality domestic materials.
“Real wooden house” in Karuizawa, Shinshu
We don't just use "solid wood." We use high-quality solid wood from Nagano Prefecture that grows robustly in a harsh environment with large temperature differences and is tightly packed with meat. Wood grown in the same climate as the land where the house is built adjusts the humidity unique to that region, creating a more comfortable interior space. This puts less stress on the trees and helps make your house last longer.
"Wow, nice smell of wood."
Forest bathing even at home
Breathing deeply feels like taking a forest bath. Feeling the warmth of the floor heating on the solid wood floor, the feeling of walking barefoot is exceptional.The soft texture, scent, warmth, and beauty of the wood grain of solid wood from Nagano Prefecture. It is also attractive that the flavor increases over time.
Nothing to do with sick house
Healthy and ethical living
To help your family stay healthy,In addition to solid wood, we use carefully selected materials such as diatomaceous earth, which has functions such as humidity control and deodorization, Japanese paper, and natural paints. TypicallyThe building materials used not only pose a health risk due to the chemical substances they contain, but also place a burden on the global environment during their manufacturing and disposal processes.On that point, natural materials that are born from the cycle of nature and return to the soil after completing their role do not pollute the land, rivers, and sea of Karuizawa.
A dirt floor salon where you can expand your life
It is important that the living space is open not only to the inside of the house, but also to the outside, where nature is abundant. "Doma Salon" is a proposal for a comfortable space that skillfully connects the indoors and outdoors.
At the doma salon,
Enrich your life in Shinshu Karuizawa
The dining and living room floors have been lowered to be flat with the outdoor terrace, making this a space where you can walk up with your shoes on. It is a special place like never before, with plenty of sunlight outside and a pleasant breeze blowing.
The wood stove is a place for family gatherings
Parents and children chop wood and put it in the stove, listening to the crackling sound and watching the flames together. A very rich time will pass.
Ecological and warm wood stoves that use thinned wood from local woodland forests instead of fossil fuels protect local forest resources.
“Building a house suited to the climate” with a deep knowledge of Shinshu
Perfect freeze protection for peace of mind in winter in Karuizawa
In high altitude areas like Karuizawa, the temperature in midwinter drops below freezing. When the temperature drops below freezing, water remaining in water pipes will freeze, causing water pipes, faucets, water heaters, etc. to burst.
Even if you are away for a long timePeace of mindSpecial specifications protect your home from the cold.
Freezing measures for foundations and piping
Water supply pipes and foundation structures are dug deeper than the point where the land freezes (freezing depth*70 cm or more) to prevent freezing.To prevent cold air, insulation will be installed in three locations: on the ground side of the foundation, above the foundation, and under the floor.
Freeze prevention measures for water supply and drainage equipment
・The heater is activated to prevent water pipes from freezing.
Turns on when the outside temperature is below 5℃, and turns off when it exceeds 5℃.
・Water can be drained using faucet equipment for cold regions.
・With header construction method of cross-linked polyethylene pipe,
Easy for emergency and future maintenance.
High-performance insulation materials and window sashes
・Hybrid window TW high performance triple glass.
Krypton gas with low thermal conductivity is filled in the hollow layer
・CFC-free・Non-formaldehyde・4VOC
Next-generation high-performance insulation material that complies with standards.
- Ensures insulation performance equivalent to ZEH.
All are ``long-term quality housing,'' so you can feel safe.
◆Earthquake resistance grade 3 (1.5 times the strength of the building standards law to withstand a seismic intensity 7 earthquake)
◆Insulation performance grade 5 (annual heating and cooling load less than 1/2 of grade 2)
◆Maintenance measures grade 3 (careful consideration, such as ease of inspection and repair of piping)
◆Deterioration prevention grade 3 (durability that lasts up to 90 years for three generations)
Long-term warranty system of up to 35 years
Regular after-sale maintenance
In order for you to live comfortably for a long time, we have a regular inspection program and
We provide an initial warranty period of 20 years for (1) the structural frame and (2) the parts that prevent rainwater from entering. We are committed to building long-term, friendly relationships with our customers.
Kobo Shinshu's house design design code
Promises to help each family achieve a “Shinshu-like lifestyle”
Each house is built by Kobo Shinshu to suit the local environment. There are basic guidelines common to all planning. By incorporating passive design, you can create a home that doesn't rely on air conditioning in the summer and allows you to feel the warmth of the sun in the winter. We also need to find ways to incorporate Shinshu's rich natural environment and landscape, as well as the changing seasons, into our homes. This is the design code for Kobo Shinshu's house.
The Japanese archipelago has a variety of climates depending on its region. You should build a home with a design that perfectly suits the characteristics of each location, such as Niigata where there is a lot of snow, Kagoshima where there are many typhoons, or Tokyo where there are many densely populated areas.
However, in Japan, where nationwide house builders have a high market share, the current situation is that houses with the same design are being built all over the country.
In Shinshu, where the seasons change so richly, there are bound to be houses that suit Shinshu and have designs that can only be found in Shinshu.
Be aware of the topography, climate, and site, and take care to ensure that the boundaries of neighboring properties are not obstructed and ventilation and sunlight are obtained. By carefully arranging flowers and trees around the outside, your home will blend in with its surroundings, allowing you to fully experience the seasons even when you're indoors. They also provide shade in the summer and let sunlight into the room in the winter. In order to enjoy the four seasons of Shinshu comfortably, Kobo Shinshu House has established a design code and proposes houses that suit the site.
For more information, please see the Kobo Shinshu’s House homepage.
https://www.kobo-shinshu.com/
Old Karuizawa House Story Video
CONTACT US
Karuizawa model house
647-4 Nagakura Minamigaoka, Karuizawa-machi, Kitasaku-gun, Nagano 389-0111
Information about Forest Corporation Co., Ltd.
1st Japan Service Award
Minister of Regional Revitalization Award
A rewarding company to work for
Best Company for 5 consecutive years
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Good Design Award
7 categories for 6 consecutive years
33rd Nikkei New Office AwardReceived “Promotion Award”
Company Profile
Established: 1960 (65th year since establishment)
Representative: Hitoshi Ozawa Number of employees: 140
Branches and sales offices: 6 locations in Nagano Prefecture (12 showrooms)
Business: Custom-built wooden houses/reinforced concrete rental houses
Also, construction and sales of detached rental housing/real estate business
Related site: Studio Shinshu House
Forest Corporation