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1. Basic Data
| Location |
6-16 Shimizudani, Tennoji-ku, Osaka City, Japan |
| Completion |
October 1993 |
| Design |
Committee for the Osaka Gas NEXT 21 Project |
| Construction work |
Obayashi Corporation |
| Site area |
1,542.92 m2 |
| Zoning |
Residential zone, classified as Class 2 Fire Zone |
| Building coverage |
60% |
| Floor space index |
300% |
| Scale |
6 floors above ground, 1 floor below ground |
| Site coverage area |
896.2 m2 (58.1%) |
| Total floor area |
4,577.2 m2 - floor space area 4,152.9 m2 (269.2%);
car parking area 424.3 m2 |
| Area of each floor |
Basement 915 m2, 1/F 668 m2, 2/F 617.7 m2,
3/F 693 m2, 4/F 636.4 m2, 5/F 587 m2,
6/F 445.9 m2, roof 14 m2 |
| Building height |
Max. height 25.42 m; max eave height 22.66 m |
| Car parking |
Total 20 (3-stage vertical parker: 18 + 1st floor parking: 2) |
| Major function |
Multiple dwelling house (18 dwellings) |
| Structures |
- Pile/foundation: direct foundation (mat slab)
- Basement to 2.F: reinforced concrete structure
- 3/F to 6/F: pre-cast concrete/reinforced concrete mixed structure |
| Air-conditioning facilities |
- Heat source: 7 TR steam-driven absorption chiller-heater (2 sets)
+ 30 TR gas absorption chiller-heater (1 set)
- Air-conditioning system: (a) households - VAV ventilation air-conditioning
system + outer/inner conditioning system, (b) hall - ceiling perforated
panels |
| Hygiene facilities |
- Water supply: mains water, reclaimed water (pressure feed)
- Wastewater: natural flowdown (partial pressure feed) |
| Electrical facilities |
- Power supply : 100 kW fuel cell + 7.5 kW single-crystal solar cells
+ 1,00 Ah lead storage batteries
- Distribution: DC power supply |
| Gas facilities |
Intermediate pressure supply (supply pressure 2500 mmAq) |
| Special facilities |
- Garbage treatment: aqua loop system (catalytic wet oxidation process)
- Wastewater/miscellaneous waste fluids: garbage treatment (contact
aerating system) + intermediate treatment (rapid SS filtering, active carbon) |
| Elevator |
One 1,000 kg or 15 person elevator |
| Car Parking |
Two-level parking system [photo] [other
examples] |
2. Urban Housing
What will housing in
the 21st Century like?
Man has come to congregate in the city, and as such housing today inevitably
faces completely different problems from when Man lived in the natural
environment -- the problem of the right mode of housing in a society where
lifestyles are becoming more diversified and in an information society
that is becoming more advanced; the problem of natural resources and pollution
countermeasures that come with increased energy requirements; the problem
of constructing houses that can adapt to changes in society and our lifestyles.
Each of these problems are interlinked and cannot be solved on their own.
NEXT 21 is an experimental housing project
designed for coming to grips with these problems through continuous trial
and error. I feel that the joint cooperation of specialists in the
fields of construction and the environment for actually constructing a
single, localized form of building is highly significant.
In the future, I hope that the various experiments
carried out in this project will contribute to meaningful suggestions for
urban housing to be built in the 21st century.
Y. Utida (Professor, Meiji University)
Chairman
Committee for the Osaka Gas NEXT 21 Project
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In their efforts to find the most desirable type of urban dwelling
in the 21st century, a number of design and planning professionals in energy,
environmental, urban, architectural and utility system got together, and
presented various problems they were confronting their respective sectors
for discussions. NEXT 21 is a solution arisen from such a process.
A variety of up-to-date technologies incorporated into this apartment house
are now being verified by the actual living experience of the occupants
while various experiments are being conducted to find a way landing to
the optimum living environment compatible with energy-saving and ecology.
 Cities
are excellent places for living. Not only because of the convenience they
afford us, but also because of their many cultural facilities and other
amenities. Yet, in the metropolises of modern-day Japan, the residential
population is steadily declining, as typified by the vast disparity between
daytime and night-time populations. In the future, people will be
required to live in cities in order to stimulate healthy urban growth.
This will, in turn, necessitate a new form of housing based upon this assumption.
Suburban type large-scale housing estates have successively been adopted
on an experimental basis in an attempt to design and develop cities. However,
there have been few attempts to revitalize an awareness in the attraction
of urban housing in urban districts. In order to make living in urban areas
more attractive, we must apply new concepts and technology in seriously
considering housing in the future. This is the point of departure
of the NEXT 21.
3. Experimental
Living
After the first six months that it is open to the public, NEXT 21 will
enter a new experiment phase as a living environment for 16 families in
order to consider a new relationship in the Earth's environment -- the
relationship between Man and city -- from the viewpoint of life in the
21st century.
Osaka Gas will evaluate how housing should be by measuring the various
statistics collected from the inhabitants of NEXT 21, a futuristic experimental
collective housing project developed through the cooperation of many people
in a variety of fields. Grasping a firm idea of which direction technology
should be developed in the future is an important theme of NEXT 21.
  
  
 
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Environment
When considering urban housing in the future, it is vital that we take
into consideration the Earth and the urban environment. From this
standpoint, even if we deal with one issue, the "green" issue, we must
pursue development while researching ecology from a stance that incorporate
the regeneration of the environment - a stance that treats "green" issue
not only from a human viewpoint but from the viewpoint that birds and other
creatures, too, are of value. |
Energy
The more advanced that civilization becomes, the more energy consumption
per person increases. Sources of energy, however, are limited.
An important mission for us is to achieve more comfortable lives without
increasing energy consumption. We will be able to achieve this through
the highly efficient utilization of natural resources and energy. |
Amenity
Urban life has its convenience, and modern-day life its comfort.
These urban living needs will probably not change in the future, either
in order to attain a higher level of satisfaction regarding our comfort,
or "daily sufficiency", we must approach technology from a new conceptual
viewpoint -- to further transform and enhance housing. |
4. Photo Gallery
5. Drawings
6. References
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Osaka Gas Experimental Housing NEXT 21, brochure from the Committee
for the Osaka Gas NEXT 21 Project.
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Sustainable Design Guide-2, Japan Institute of Architects, Tokyo,
May 1996, pp. 70-73.
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GA Japan Environmental Design, Winter 1993 Vol.02.
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GA Japan Environmental Design, Jan-Feb 1994 Vol.06.
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Japan Architect, Spring 1995-1 Vol. 17.
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«Ø¿v¤å¤Æ Kenchiku Bunka,
Jan 1994 Vol.49 No. 567.
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AIA Environmental Resources Guide Case Study.
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Information from Osaka Gas
Co., Ltd. (in Japanese)
7. Further Reading
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