ENTRY
2 units (minimum)
From ¥10.7M
- Nights
- 16 nights a year, across all eight buildings
- Management
- ¥700,000 / year
Includes priority booking for August.
Biruwa Grand · by referral
Eight buildings,
one hundred owners.
On 32,337 tsubo in Teshikaga, Hokkaido: container villas, a dome, a sauna tower, log cabins. Eight distinct buildings forming one small settlement. Hold a single unit and every building is yours to use.
- buildings
- 8
- units
- 100
- per unit, today
- ¥5.3M
- fully open
- Spring 2029
Available to those with a referral. Online purchase is currently closed.
(Buildings)
Never the same room
twice.
Each building differs in interior and scale. A single unit lets you choose among all eight, so the place you stay changes with the season and the mood. The tower sauna is shared by every owner.
01
Container Villa
Two 40ft containers side by side. 74m² plus a 30m² rooftop deck, sleeps eight.
02
Dome House
A curved-glass dome that glows like a lantern on the snowfield.
03
Tower Sauna shared
Wood stove, ice bath and an outdoor deck. Shared by every owner.
04
Log Cabin
Thick-log cabin, with the sound of firewood and the scent of resin.
05
Instant House
A dome-shaped structure — a quiet retreat for a smaller group.
06
Off-grid Lodge
Runs on solar and batteries alone. Living without a utility pole.
07
NESTING
High-insulation retreat built for two.
08
Forest Lodge
A lodge half-sunk into the forest; every window is green.
(Village)
Images are AI-generated concept visuals and may differ from the finished specification and appearance.
(Specification)
Everything in one building.
Two 40-foot containers set side by side: 74 m² plus a 30 m² roof terrace. Insulation at UA 0.46 or better, a cast-iron wood stove for heat. Life without a utility pole, built to a standard you can actually live in.
The specification below is for one container villa. Details for the other seven buildings follow.
- Footprint
- 12.19 × 4.88 m, 2.9 m high
- Floor area
- 52 m² ground floor + 22 m² mezzanine = 74 m²
- Roof terrace
- 30 m² (12 × 2.5 m)
- Sleeps
- Up to 8
- Insulation
- 100 mm urethane + 50 mm rock wool, UA ≤ 0.46
- Power
- 12 kWp solar + two Powerwall 3 units (27 kWh)
- Heating
- Jøtul F 305 wood stove + electric floor heating
- Water
- 80 m on-site borehole + RO filtration
- Connectivity
- Starlink + Wi-Fi 6
(Land)
The land is already ours.
Acquired in December 2020. Four parcels in Biruwa, Teshikaga, totalling 106,899 m² on the registry — about 2.3 times the footprint of Tokyo Dome. Outside the city planning area, in the ordinary zone of the Natural Parks Act. No neighbouring buildings.
Lake Mashu 25 km, Lake Kussharo 20 km, Lake Akan 35 km. About 60 minutes by car from Kushiro Airport.
- on the registry
- 106,899 m²
- parcels
- 4 parcels
- parcel numbers
- 501-1 / 658-4 / 607-1 / 607-2
- land category
- Wilderness
(Ownership)
One unit,
now ¥5.3M.
The first unit was ¥4.9M, and each unit sold raises the price by ¥100,000. 4 units are sold, so a unit is now ¥5.3M; the minimum is two units, from ¥10.7M in total. That is 16 nights a year in any of the eight buildings, with management at ¥350,000 per unit per year.
What you hold
A unit is intended to combine eight nights of use a year with a registered interest in the land and buildings, offered as a membership. The registration method, transfer and inheritance terms, and exit conditions are fixed in the contract, so this page does not state them as final. We explain them in writing during consultation.
How the price rises
Each unit sold raises the price by ¥100,000. Your price is fixed at the number of units sold when you apply, so earlier is cheaper. The final price at 100 units is ¥14.8M.
- at 1 unit¥4.9M
- at 10 units¥5.8M
- at 25 units¥7.3M
- at 50 units¥9.8M
- at 75 units¥12.3M
- at 100 units¥14.8M
PREMIUM
4 units
From ¥21.8M
- Nights
- 32 nights a year, across all eight buildings
- Management
- ¥1,400,000 / year
August dates can be confirmed four months ahead, from April.
Prices are fixed at the number of units sold when you apply (as of November 4, 2026, 4 units sold). Online purchase is closed; consultation is free.
(Schedule)
Breaking ground 2027, fully open spring 2029.
2026
Design, master plan, permits
Selecting the architect, finalising the container villa design, filing for building confirmation with Teshikaga, surveying and ground tests.
2027 Q1
Groundbreaking and foundations
Container units ordered. Ground improvement for frost and foundation work. Power, water and Starlink infrastructure.
2027 Q2–Q3
Containers set, exteriors finished
Containers arrive and are set. Corten steel exteriors with cedar accents. Solar and batteries installed.
2027 Q4
Interiors complete, first zone opens
Insulation and interiors finished, KAGI smart locks installed. Accommodation zones A–C open.
2028
Shared facilities
Bathhouse, wood-fired saunas, BJJ arena and the 1,000 m² log hall complete. Farm and perimeter trails laid out.
Spring 2029
Fully operational
All ten zones running, with capacity for up to 240 guests.
(FAQ)
Answers,
before you ask.
Can I stay in all eight buildings with a single unit?
Yes. One unit gives you eight nights a year across all eight buildings. Buildings are allocated first-come, first-served, and a family can use two at once within the total nights.
When is the price fixed?
Pricing follows a bonding curve: each unit sold raises the price by ¥100,000. Your price is fixed at the number of units sold when you apply, so earlier is cheaper. The final price at 100 units is ¥14.8M.
Do I have to manage the property myself?
No. The management fee (¥350,000 per unit per year) covers cleaning, maintenance, reservations and guest care. How unused nights are handled will be explained in writing once the contract form is final.
Can I buy right now?
Biruwa Grand is referral-only and online purchase is currently closed. Consultation is free: we explain the material terms on a video call before anything is signed.
Is it comfortable in winter?
Behind the Corten steel exterior sit 100 mm of urethane and 50 mm of rock wool, for a UA value of 0.46 or lower. A Jøtul cast-iron stove is the primary heat, backed by electric floor heating and batteries.
Is the land actually owned?
Acquired in December 2020. Four parcels in Biruwa, Teshikaga, totalling 106,899 m² (about 32,337 tsubo) on the registry, zoned as wilderness. Outside the city planning area, within the ordinary zone of the Natural Parks Act.
By referral
32,337 tsubo,
shared by one hundred.
Biruwa Grand is offered to those with a referral. Consultation is free, and we walk through the material terms on a video call.