BASE L
Designed ByYosuke Aizawa1 bathroom
290.97㎡〜
Invite close friends for a shared meal in a spacious setting.
Gather around the fire on the terrace, soak in the rock hot spring bath, and forget the city's hustle.
A secret hideaway in the forest.
Director
Yosuke Aizawa
Graduated from the Department of Textile Design at Tama Art University. After working at COMME des GARÇONS, he founded White Mountaineering in 2006. In 2026, marking the brand's 20th anniversary, he stepped down as its designer and launched the design studio "stactis studio". He serves as Director and CCO of Hokkaido Consadole Sapporo and as a visiting professor at Tama Art University, and is active across a wide range of fields including architectural and product direction.
Features
Overview
A forest retreat for up to eight
Living
Spacious elegance with a cozy fireplace
Bedroom
Bedrooms for personal time and space
Bath
Natural hot spring in a rock bath
Sauna
Open sauna harmonizing with the seasons
Outdoor Living
Another living room set in the heart of nature
Exterior
A 6.3m (20.67 feet) high ceiling sanctuary in the woods
Interior
Synchronized elegance with original interiors in architectural harmony
Getting there
Travel time from Tokyo
Address: 2286-340 Hosohara, Oaza Omae, Tsumagoi Village, Agatsuma District, Gunma Prefecture, Japan
Masterplan
SIZE AND LAYOUT
Interior size: 158.65㎡ (1,707.69 sq ft)Total area: 290.97㎡〜
3 bedrooms1 bathroom
KEY AMENITIES
Outdoor hot spring bath (onsen)Outdoor fireplaceSaunaPrivate garden (pet-friendly units only)Full, modern gallery kitchenDining table for 8 guests
Property details
- Advertiser name
- NOT A HOTEL Co., Ltd.
- Office address
- 4-7-4 Harumi, Chuo-ku, Tokyo, Japan
- Telephone
- 050-1780-3110
- License Number
- Tokyo Governor (2) 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 BASEL6/BASEL7/BASEL8
- Property address
- 2286-59, 2286-60, 2286-65, 2286-66, 2286-79, 2286-56, 2286-57 Omae, Tsumagoi-mura, Agatsuma-gun, Gunma, Japan
- Access
- Approximately 35 minutes by car from JR Hokuriku Shinkansen "Karuizawa Station"
- Site area
- BASEL6: 4,719 sq m
BASEL7: 4,378 sq m
BASEL8: 5,307 sq m - Land rights
- Leasehold
- Lease term
- 50-year fixed-term lease
- Indoor floor area
- BASEL6/L7/L8: 162.10 sq m
- Building Area / gross floor area of the building
- BASEL6: 253.16 sq m
BASEL7: 253.16 sq m
BASEL8: 253.16 sq m - Exclusive Area (Indoor Area + Terrace + Courtyard)
- BASEL6: 290.97 sq m
BASEL7: 297.25 sq m
BASEL8: 346.95 sq m - Structure / Floors
- 2-story wooden structure
- Layout
- BASEL6: 3 Bedrooms
BASEL7: 3 Bedrooms
BASEL8: 3 Bedrooms - Building Confirmation No.
- CIAS01126 (2026) (L6)
CIAS01127 (2026) (L7)
CIAS01128 (2026) (L8) - Design
- NOT A HOTEL ARCHITECTS
- Construction
- Tatebayashi Kogyo Co., Ltd.
- Type of membership interest
- Co-ownership
- Price
- JPY 29,801,200 (incl. tax)
- Price Breakdown
- Building: JPY 20,098,100
License: JPY 7,731,900
Furniture & Fixtures: JPY 706,200
Deposit for Redemption: JPY 1,265,000 - Annual Management Cost (Entire Unit Purchase)
- JPY 51,350/month (incl. tax)
- Eligibility Requirements
- In accordance with the NOT A HOTEL Owner Agreement Terms & Conditions
- Transferability of Rights
- Subject to the NOT A HOTEL Owner Agreement Terms & Conditions
- Total Units / Units Available
- Total Shares: 36 shares per residence (10 nights per share annually) / Shares Available in This Offering: 36 shares
- Total Number of Rooms
- 3 units
- Scheduled construction completion
- December 31, 2027 (planned)
- Scheduled start of use
- March 2028 (planned)
- Facility usage fee
- Included in the management fee
- Reservation method
- Reservations may be made up to 10 months in advance within the allocated annual usage nights.
- Restrictions on use
- Subject to the NOT A HOTEL Owner Agreement Terms & Conditions
- Annual usable nights (per share)
- 10 nights
- Ancillary Facilities / Conditions
- Not applicable
- Operating entity
- NOT A HOTEL MANAGEMENT Co., Ltd.
- House exchange program
- Available
- House exchange program details
- Owners may use NOT A HOTEL properties nationwide (10 locations in operation as of the sale of this property) by paying the applicable House Exchange difference, if any.
- Use of Club Facilities by Non-Members
- Not applicable
- Operational scheme
- The property is loaned to the operating company, which manages and operates it as a hotel.
- Validity of transaction terms
- Until next scheduled update
- Disclosure / next update
- As of September 11, 2026. Next scheduled update: November 1, 2026.
LOCATION
At the Foot of Mount Asama, a Secret Haven Through the Seasons
Landscape
While just about a 30-minute drive from Karuizawa Station, the Kitakaruizawa area offers untouched nature.
Restaurant
The property includes a private restaurant for owners called "Sekiboku."