Last Uploaded: July, 2008

Kansai Electric Power Building

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Project Outline

This building was designed to house the Head Office functions of Kansai Electric Power Company. Built as Phase I of the “Nakanoshima 3-Chome Joint Development Project”.
One of the basic concepts for this building is a "model building for environmental symbiosis". In areas around windows, the outer frames (columns, beams) protrude by about 1.8m outwards from the window surface. This not only constitutes a shaded exterior but also provides functions such as a natural light intake from the large window surfaces, shielding of sunlight by the canopy, introduction of natural ventilation via the eaves, and space for installation of solar panels. Besides these, we have also introduced a task-ambient air conditioning system, internal heat storage and other technology for environmental symbiosis.
The building also features a “communication well” (a three-floor atrium in the high-floor office zone), the aim of which is to communicate widely.

Basic Information

[CASBEE rank] S  () Certified
[CASBEE tool used] CASBEE for New Construction (2006 edition)
[Location] Osaka City, Osaka Prefecture
[Completion date]

December, 2004

[Site area] 21,089 m2
[Total floor area] 106,484 m2
[Structure] S / part SRC / RC
[Floors] 5 basement levels / 41 floors above ground
[Owner] Kanden Fudosan Co., Ltd. , Kansai Electric Power Co.,Ltd
[Designer] Nikken Sekkei Ltd. / NEWJEC Inc. JV
[Contractor] (Construction) Takenaka / Obayashi / Konoike Construction / Asanuma / Zenitaka / Okumura JV
(Electricity) Kinden / Kansai Tech / Kanden Kogyo / Sumitomo Densetsu JV
(Climate Control Equipment) SANKI Engineering / Kinden / Takasago Thermal Engineering / Shinryo JV
(Plumbing, drainage and sanitary Equipment) Sanko Air Conditioning / Dai Dan JV
(Precast Concrete Panel) Kinki Concrete Industries Co.,Ltd.

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  • 2nd Sustainable Building Awards, IBEC Chairperson's Prize (Institute for Building Environment and Energy Conservation, 2007)
  • 45th SHASE Awards of Technology, Category in Building Mechanical Service System (The Society of Heating, Air-Conditioning and Sanitary Engineers of Japan, 2007)
  • 18th IEIEJ Awards, Technical Section, Facility Prize (The Institute of Electrical Installation Engineers of Japan, 2006)
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These cases are described based on assessment results obtained using CASBEE.
CASBEE is a method for rating the environmental performance of buildings using Building Environmental Efficiency (BEE) as an indicator, which is based on the results of separate scores obtained for Q-1~Q-3 (Quality) and LR-1~LR-3 (Load Reduction).