IRORI 2.0
Designed ByNOT A HOTEL ARCHITECTS3 bathrooms
338.20 sq m (3,640.35 sq ft)
Blending into nature with its all-glass façade,
NOT A HOTEL KITAKARUIZAWA’s flagship “IRORI” is now significantly updated.
An infinity pool open to the forest, a cozy living room surrounding a new hearth, and sofa seating—
All redesigned into a more comfortable, family-friendly space.
INIFINITY POOL
The new infinity pool blends into the forest, preserving IRORI's serene charm.
A tranquil expanse that draws the eye into the woods and enriches your stay.
IRORI
The iconic sunken hearth has been redesigned with sofa seating.
A more relaxed and natural space for tranquil moments across generations.
BATH & SAUNA
Open the door to a semi-open-air bath connecting to the terrace and infinity pool.
The hot spring carved from massive stone warms you in every season—even in snowy Kita-Karuizawa winters.
LIVING & DINING
A glass-walled space with a surprising sense of openness.
The 8-seat dining table makes it ideal for relaxing meals or entertaining guests.
BEDROOM
Guest bedrooms are slightly elevated, creating a sense of rhythm and depth. The space evokes the feeling of a stage, opening up to seasonal views. A thoughtfully placed desk invites quiet reflection or work.
EXTERIOR
A refined balance of high-transparency glass and warm wood blends beautifully with nature.
8cm-thick double-glazed windows ensure indoor comfort year-round.
One of the two buildings is pet-friendly and includes a dog run.
Creators
NOT A HOTEL ARCHITECTS
Akinori Nagashima
Designer
NOT A HOTEL ARCHITECTS
Akinori Nagashima
Designer
First-Class Architect. Completed graduate studies at Shibaura Institute of Technology. Previously worked at Shimizu Corporation, designing research institutes, universities, factories, and offices. Joined NOT A HOTEL in May 2024, focusing on in-house design projects. Licensed First-Class Architect.
NOT A HOTEL ARCHITECTS
Shiho Sasaki
Project Manager
NOT A HOTEL ARCHITECTS
Shiho Sasaki
Project Manager
Graduated from the School of International and Social Studies, University of Tsukuba.
Worked at CBRE, managing corporate office relocations and renovations.
Joined NOT A HOTEL in March 2024. In charge of project management for the KITAKARUIZAWA project.
NEW
KIDS PARK & GYM
A Grand Stage for Adventure, Set in the Forest
Kids can climb, run, and slide in the great outdoors—sled in winter, and play on the grassy roof in summer. Indoors, they’ll enjoy athletic activities or quiet time with a book. A place where play and learning go hand in hand. A full gym for adults is also available.
Please note: KIDS PARK is planned to be available for a fee.
NEW
CAFE & DINING
An open café and restaurant immersed in the forest
Next to the kids park is a café restaurant offering seasonal menus and course meals. Relax and enjoy conversations while watching your children play. A warm, welcoming space for all generations to spend quality time together.
RESTAURANT
SEKIBOKU: An exclusive restaurant available only to staying guests
Sekiboku, a restaurant exclusively for staying guests, offers simple yet refined irori-style dishes, including charcoal-grilled meats and seasonal clay pot rice.
LOCATION
95 minutes by car or 60 by helicopter—an untouched forest retreat for all seasons.
Just a 30-minute drive from Karuizawa Station, the Kita-Karuizawa area offers untouched nature and serene seclusion. Follow a scenic route with views of Mount Asama to reach a quiet forest hideaway—completely private and undisturbed. A tranquil highland retreat where time flows slowly and every visit feels fresh, no matter the season.
A stay surrounded by nature and filled with activity
The surrounding area is rich in attractions that allow you to fully enjoy nature—such as farms, athletic facilities, ski resorts, and hot springs. You can enjoy a variety of outdoor activities, including hiking and winter sports.
Getting there
Travel time from Tokyo
Address: 2286-246 Hosohara, Oaza Omae, Tsumagoi Village, Agatsuma District, Gunma Prefecture, Japan
Masterplan
PRICE BREAKDOWN
1/12 shared ownership1,157,000 USD (178,880,000 JPY)Can stay up to 30 nights/year
SIZE AND LAYOUT
Interior size: 244.73 sq m (2,634.25 sq ft)Total area: 338.20 sq m (3,640.35 sq ft)
8 beds3 bathrooms
KEY AMENITIES
Panoramic forest viewOutdoor fireplaceSaunaPlayroomFull, modern gallery kitchenDining table for 8 guests
Property details
- Advertiser name
- NOT A HOTEL Co., Ltd.
- Office address
- 3-11-8 Sendagaya, Shibuya-ku, Tokyo
- Telephone number
- 050-1780-3110
- License number
- Tokyo Governor (1) No. 106188
- Affiliated association
- Tokyo Real Estate Transaction Association (Member of Fair Trade Council)
- Transaction type
- Seller
- Seller
- NOT A HOTEL Co., Ltd.
- Project developer
- Same as above
- Property name
- NOT A HOTEL KITAKARUIZAWA IRORI2.0
- Property address
- 2286-246, Hosohara, Oaza Omae, Tsumagoi-mura, Agatsuma-gun, Gunma
- Access
- Approx. 35 minutes by car from Karuizawa Station (JR Hokuriku Shinkansen)
- Site area
- IRORI-3: 4,833 sq m, IRORI-4: 6,313 sq m
- Land rights
- Leasehold
- Lease term
- Fixed-term leasehold for 50 years
- Indoor floor area
- 244.73 sq m
- Total floor area
- 299.10 sq m
- Exclusive floor area
- 338.2 sq m
- Structure / floors
- Steel frame partly reinforced concrete, 2 stories
- Layout
- IRORI-3: 3 Bedrooms, IRORI-4: 3 Bedrooms
- Building confirmation numbers
- IRORI-3: 2025 Confirmation CIAS01144, IRORI-4: 2025 Confirmation CIAS01145
- Design
- NOT A HOTEL ARCHITECTS
- Construction
- Nakamura Doken Co., Ltd.
- Type of membership interest
- Co-ownership
- Total price
- JPY 2,146,557,600 (incl. tax)
- Price breakdown
- Building: JPY 1,537,668,000 / License: JPY 472,032,000 / Furniture: JPY 41,144,400 / Redemption Deposit: JPY 95,713,200
- Monthly management fee
- JPY 3,957,840/month (incl. tax)
- Ownership restrictions
- Subject to NOT A HOTEL Owner Agreement T&Cs
- Transfer of rights
- Subject to NOT A HOTEL Owner Agreement T&Cs
- Total number of shares / offering
- 72 units total (10 nights/year), 72 units this offering (10 nights/year)
- Total units
- 2 units
- Scheduled construction completion
- Late July 2027
- Scheduled start of use
- Mid-November 2027
- Facility usage fee
- Included in management fee
- Reservation method
- Reservations possible 10 months in advance within allotted nights
- Restrictions on use
- Subject to NOT A HOTEL Owner Agreement T&Cs
- Annual usable nights (per share)
- 10 nights
- Ancillary facilities
- None
- Operating entity
- NOT A HOTEL MANAGEMENT Co., Ltd.
- House exchange program
- Available
- Number of house exchange facilities and terms of use
- Can use any NOT A HOTEL nationwide (6 locations at time of sale) by paying the price difference (if any)
- Use by non-members
- Not applicable
- Operational scheme
- Leased to operator, operated as hotel
- Validity of transaction terms
- Until next update
- Disclosure / next update
- As of Nov 4, 2025. Next update: Jan 1, 2026
Personal assistance,
just a tap away
Connect with your Concierge at anytime through NOT A HOTEL App. Get notifications for travel itineraries, reservation reminders, and weather reports.
Frequently Asked Questions
* Some properties do not have closets, but you can still store your belongings.
* Storage availability, features, and specifications vary by location.