… arhitectii japonezi ARTechnic au construit recent o vila contemporana si interesanta in karuizawa, japonia. designul este mai mult decat innovator. cine a mai vazut cladiri tubulare? nu e ca si cum se gasesc la tot pasul … si oricum, nu destinate locuirii si nu in padure🙂 curbele sinuoase creaza un spatiu diferit de ceea ce ochiul uman este obisnuit sa vada, sa perceapa … jocul celor 2 volume da o senzatie de organic … de natural. as zice ca aduc amintesc de trunchiurile copacilor cazuti intamplator prin paduri si de scorburile in care animalutele mici isi fac adapost … eu asa m-as simti locuind aici🙂. un alt element interesant al acestei locuinte se poate observa in plan. intreaga constructie se ‘invarte’ in jurul unui singur brad, creand astfel un spatiu personal, un soi de gradina interioara … numai ca doar ideea uneia, avand in vedere ca ne aflam totusi in plina natura🙂
Japanese architects ARTechnic have completed Shell, a holiday villa in Karuizawa, Japan.
The two-storey, concrete house comprises two tubes with oval sections, arranged around a fir tree.
The floor is raised 1.4 metres from the ground; the architects intended to minimise time spent on maintaining the property by separating the house from its natural surroundings.
“Being in sync with nature isn’t about yielding to nature – it’s about coexistence,” explains Kotaro Ide of ARTechnic. “The existence of the structure depends on its power to endure nature.”
Here’s some more information from ARTechnic architects:
Description of mechanical system
For the house to be actually used, we paid the ultimate attention to its comfort and performance level.
With its classic status as a summer resort, many old villas in Karuizawa take on traditional styles, from the time when visitors arrived with the intention of staying for at least a month. Little did it matter that a day or two had to be spent on maintaining the house, given the long sojourn. With the advent of the Shinkansen, the high-speed railways, Karuizawa is merely an hour and 10 minutes away from Tokyo – visiting Karuizawa just for the weekend has become a norm today. A shorter visit calls for a shorter duration of maintenance.
The central control system enables all mechanical and electrical equipments to be managed by three buttons. In addition, the biometrics lockage and security system will reduce anxiety and stress over house safety management. The installment of the custom made floor-heating system minimizes the use of heat energy for avoiding the trouble of emptying drainage in cold regions.
Furthermore, it is highly effective in mold prevention. In addition, it works as a cold-draft blocking system which enables the luxury of enjoying a hefty amount of space with large openings. The system integrates itself within the architectural form.
Assuming future interior and equipment maintenances (including the window sash) for continual use, the frame is completely separate. The building frame is assumed to assimilate with its surroundings with the passage of time. To provide efficiency during maintenance, the concrete was exposed, finished with a penetrative sealer for concretes.
Description of building composition
The plan was to build the villa around the big fir tree as the center of the site, with a row of pine trees as the main view. Initially, we had planned to build a shell structure with three dimensionally curved surfaces, and the C shaped section was to surround the fir tree and the plan of the building resembled the letter J.
In addition, certain parts were planned to hold double volume space. Yet, going over the budget, construction method and finish, the plan was revised down to a shell structure of two dimensionally curved surfaces. The J shaped structure is constructed by two different size oval cylindrical masses cut with curves.
The straight part of J, a smaller mass connects to a curved part to J, a larger mass. The top of the oval shaped building wall thickens by 350mm and its width continuously increases up to 750mm at both sides to meet the structural requirements.
The free-curved lines appear on the edge, and the three dimensionally curved surface with a twist partly appears on the cut surfaces. However the entire structure was composed by two dimensionally curved surfaces.
All air and exhaust outlets are installed beneath the sash, letting air run outside through the terrace louver. In addition, by devising unfixed windows, we tried to maximize natural ventilation (we haven’t arranged air conditioning in general parts). While at a glance, the oval shaped cylinder space might appear as wasteful use of space, the functional use of space is maximized by the installation of furniture in the lower half of the oval cylinder.
Project title: SHELL
Architects: Kotaro Ide / ARTechnic architects
Assistants : Moriyuki Fujihara・Ruri Mitsuyasu・Takashi Mototani (former member) Kenyu Fujii
Collaborator: ManamiIde (designer of customized metal work)
Structural engineer: Naomi Kitayama / NAO
Mechanical engineer: Hiroshi Nakayama / TNA
Electrical engineer: Jyunetsu Satou / EPS
Constructor: Kenji Kusunoki / GIKAKU
Location: Karuizawa, Kitasaku, Nagano
Principal use: Private villa
Structure: Reinforced concrete
Foundation: Spread foundation
- 2stories / Maximum height 6.45m
- Site area: 1711.03㎡
- Building area: 274.38㎡ (building coverage ratio 16.04％ legal max.20％)
- Total floor area: 329.65㎡ (floor area ratio 19.27％ legal max.20％)
- 1st floor: 267.80㎡
- 2nd floor: 61.85㎡
- Roof and exterior walls: Exposed concrete with penetrative sealer finish
- Roof and exterior walls (entrance): Exposed concrete with penetrative sealer and heat insulating paint finish
- Openings: Steel and aluminum sash
- Terrace flooring: Ulin flooring ｔ=20mm with penetrative paint finish
- Ceiling and interior walls: Expanded hard urethane form t=60ｍｍ with synthetic resin with vermiculite material spray finish
- Ceiling and interior walls (entrance): Heat insulating paint finish
- Ceiling and interior walls (double volume space): Plastered finish
- Interior walls (a part): Teak plywood with oil finish
- Flooring: Ulin flooring t=15mm
- Flooring (entrance concrete floor): Concrete exposed-aggregate finish by washing with color paint finish