NEC Facilities Contributes to NEC Headquarters Building Earning Tokyo 'Top Level Facility (Silver)' Certification
Supported by NEC Facilities, the NEC Headquarters Building was certified as a Tokyo 'Top Level Facility (Silver)' for its advanced energy management and 100% renewable energy operations.
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April 23, 2026
NEC Facilities, Ltd.
NEC Facilities, Ltd. (Headquarters: Minato-ku, Tokyo; President and Representative Director: Eiji Ozaki; hereinafter "NEC Facilities") announces that the NEC Headquarters Building, for which the company has been supporting facility management and the planning and execution of energy-saving measures, has been certified as a "Top Level Facility (Silver)" under the Tokyo Metropolitan Government's "Top Level Facility Certification System" for fiscal 2025 (Reiwa 7).
As the maintenance and management company for the NEC Headquarters Building, we have continuously promoted the advancement of energy management, the planning and execution of energy-saving measures, and the improvement of equipment operations, thereby contributing to the acquisition of this certification.
■ Background
The "Top Level Facility Certification System" is a program by the Tokyo Metropolitan Government that comprehensively evaluates large-scale facilities on their efforts to improve energy efficiency and reduce greenhouse gas emissions, certifying particularly outstanding facilities as "Top Level Facilities." There are three levels of certification, and "Silver" is awarded to facilities that implement high energy-saving standards and planned, continuous environmental measures.
As a facility subject to the Tokyo Metropolitan Government's Global Warming Countermeasures Plan System, the NEC Headquarters Building was required to continuously and systematically reduce greenhouse gas emissions.
NEC Facilities, as the maintenance and management company for the building, took on the role of promoting global warming countermeasures based on the Tokyo system. Working closely with the business operator, we have continuously driven the advancement of energy management for the entire building, the planning and execution of energy-saving measures, and the improvement of equipment operations. These efforts go beyond mere equipment replacement; by integrating daily operational management, utilization of energy data, and maintenance inspections, we have achieved both energy savings and stable building operations, leading to this certification.
■ Main Energy-Saving Measures at the NEC Headquarters Building
NEC Facilities has planned, executed, and supported the operation of the following energy-saving measures at the NEC Headquarters Building:
・Visualization and continuous analysis of energy usage for the entire building
・High efficiency and operational improvements for air conditioning and lighting equipment
・Introduction of optimal control based on equipment operating conditions
・Performance maintenance and maximization of energy-saving effects through daily inspections and maintenance
・Supplying power generated by solar power facilities installed at the NEC Abiko Plant (managed and operated by NEC Facilities) to the NEC Headquarters Building via self-wheeling
Through these initiatives, the NEC Headquarters Building actively utilizes electricity derived from renewable energy, achieving building operations essentially running on 100% renewable energy. We have steadily reduced energy consumption and CO2 emissions while ensuring comfort and business productivity.
■ Future Developments
We will continue to enhance environmental measures at the NEC Headquarters Building through highly accurate energy management and the utilization of new technologies, contributing to the environmental policies of the Tokyo Metropolitan Government and the environmental management of the NEC Group.
NEC Facilities will continue to leverage the technologies and expertise cultivated as facility management professionals to proactively promote initiatives toward realizing a carbon-neutral society as a whole.
End
NEC Facilities, Ltd.
NEC Facilities, Ltd. (Headquarters: Minato-ku, Tokyo; President and Representative Director: Eiji Ozaki; hereinafter "NEC Facilities") announces that the NEC Headquarters Building, for which the company has been supporting facility management and the planning and execution of energy-saving measures, has been certified as a "Top Level Facility (Silver)" under the Tokyo Metropolitan Government's "Top Level Facility Certification System" for fiscal 2025 (Reiwa 7).
As the maintenance and management company for the NEC Headquarters Building, we have continuously promoted the advancement of energy management, the planning and execution of energy-saving measures, and the improvement of equipment operations, thereby contributing to the acquisition of this certification.
■ Background
The "Top Level Facility Certification System" is a program by the Tokyo Metropolitan Government that comprehensively evaluates large-scale facilities on their efforts to improve energy efficiency and reduce greenhouse gas emissions, certifying particularly outstanding facilities as "Top Level Facilities." There are three levels of certification, and "Silver" is awarded to facilities that implement high energy-saving standards and planned, continuous environmental measures.
As a facility subject to the Tokyo Metropolitan Government's Global Warming Countermeasures Plan System, the NEC Headquarters Building was required to continuously and systematically reduce greenhouse gas emissions.
NEC Facilities, as the maintenance and management company for the building, took on the role of promoting global warming countermeasures based on the Tokyo system. Working closely with the business operator, we have continuously driven the advancement of energy management for the entire building, the planning and execution of energy-saving measures, and the improvement of equipment operations. These efforts go beyond mere equipment replacement; by integrating daily operational management, utilization of energy data, and maintenance inspections, we have achieved both energy savings and stable building operations, leading to this certification.
■ Main Energy-Saving Measures at the NEC Headquarters Building
NEC Facilities has planned, executed, and supported the operation of the following energy-saving measures at the NEC Headquarters Building:
・Visualization and continuous analysis of energy usage for the entire building
・High efficiency and operational improvements for air conditioning and lighting equipment
・Introduction of optimal control based on equipment operating conditions
・Performance maintenance and maximization of energy-saving effects through daily inspections and maintenance
・Supplying power generated by solar power facilities installed at the NEC Abiko Plant (managed and operated by NEC Facilities) to the NEC Headquarters Building via self-wheeling
Through these initiatives, the NEC Headquarters Building actively utilizes electricity derived from renewable energy, achieving building operations essentially running on 100% renewable energy. We have steadily reduced energy consumption and CO2 emissions while ensuring comfort and business productivity.
■ Future Developments
We will continue to enhance environmental measures at the NEC Headquarters Building through highly accurate energy management and the utilization of new technologies, contributing to the environmental policies of the Tokyo Metropolitan Government and the environmental management of the NEC Group.
NEC Facilities will continue to leverage the technologies and expertise cultivated as facility management professionals to proactively promote initiatives toward realizing a carbon-neutral society as a whole.
End