Tecno-Station, Obayashi Corporation Technical Research Institute


The project, in short

Our new office building (Techno-Station, Obayashi Technical Research Institute) will achieve a 55% of CO2 emission reduction compared to conventional office buildings in Tokyo. In order to achieve this reduction, we adopted not only the passive methods but also the innovative active technologies.

Renewable energy such as solar power and natural ventilation are used as passive methods to strengthen the building’s thermal performance. An innovative HVAC system has been applied as an active method. High-performance air-cooled heat pumps and ground-coupled heat pumps are applied as a heat source system. The sensible heat and latent heat load of the main office space are separately treated using a desiccant OHU and a task panel, which were newly developed for this project.

In addition, BEMS is applied for the energy management and control. The building’s energy performance is visualized to the occupants to facilitate user participation in CO2 management action. These systems reduce CO2 emissions by 55% during operation, the highest level in Japan.

Furthermore, the building achieved a CASBEE® S rank and 7.6 BEE because of its overall reduction in environmental burdens.


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Project name Tecno-Station, Obayashi Corporation Technical Research Institute
Type (new/renovation) New
Designer(s) Obayashi Corporation, Design Division
Owner(s) Obayashi Corporation
Developer(s) Obayashi Corporation
Year of construction 2010
Address, Country

4-640 Shimokiyoto Kiyose-shi Tokyo, Japan

Building life span 50 years
Heating-degree days 1592 °C day (D18-18)
Cooling-degree days 377 °C day (D22-22)
Project gross area above ground [m²] 5535,38
Project gross area (including below ground) [m²] 8255
Site area [m²] 69401,3
Stories (above grade) 3
Occupancy type(s) Office
Typical building population 200
Number of operating hours / year 2596
Assessment phase New
Assessment tool CASBEE 2008 v. 3.4
Rating Class S BEE=7.6

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