Over 90% of the CO2 emissions of the NTT Group are from power consumption. Thus, in 1997 we launched a campaign called Total Power Revolution (TPR) in order to reduce our power consumption. The TPR campaign promotes energy management at the approximately 4,000 buildings we own nationwide. The campaign has included efforts to introduce energy-efficient power and air-conditioning systems; convert servers, routers, and other IP equipment to use DC power in order to reduce power consumption; and improve energy self sufficiency through such clean sources of energy as solar and wind power systems. In fiscal 2004, we succeeded at reducing out power consumption by 180,000 MWh.
Due to the growth of broadband services, however, we installed additional IP equipment, and installed new third-generation mobile-phone base stations. As a result, our power consumption has increased with each year; consequently, our CO2 emissions in fiscal 2004 were 3,190,000 tons, a 180,000-ton increase against the previous year.
The NTT Group is committed to achieving an age of safety and security, and ubiquitous broadband and computing. In order to accomplish this, we will continue to work to expand the telecommunications infrastructure. We have thus changed the index used for our targets for global-warming prevention from total CO2 emissions to CO2 emissions per unit. We are committed to efficiently deploying telecommunications equipment, while reducing the environmental impact on society as a whole through the deployment of ubiquitous broadband services provided by the NTT Group.
FOMA Base Station Using Solar and Wind Power
In July 2004, NTT DoCoMo began operating a FOMA-service base station called the DoCoMo Eco Tower. In consideration for the global environment, the tower does not use commercial power; it is completely self-powered, using solar and wind power.
Located in the city of Tateyama, Chiba, the 32.5-meter tower's design evokes the image of a canola blossom, the Chiba Prefectural flower. The solar panels at the bottom are designed to look like leaves, the tower itself the stalk, and the windmill vanes the flower's petals. Its maximum power-generation capability is 8.5 kWh from solar power and 6.0 kWh from wind power. The NTT DoCoMo Group has 16 mova-service base stations that use solar and wind power, but this is the first such FOMA-service base station.
The NTT East Saitama Shintoshin Building: A State-of-the-art Energy Efficient Building
 NTT East Saitama Shintoshin Building
Construction of the NTT East Saitama Shintoshin Building (Saitama Media Wave) began in July 2004. The building features a system integrating the management of building air conditioning, electricity, fire prevention, security, and other equipment with telecommunications equipment using the IPv6 next-generation Internet standard.
Support for IPv6 by the controllers for the building's equipment enables efficient scheduled operations using operational-status data from day-to-day operations. The system saves energy by eliminating needless operation. The building also actively incorporates natural lighting, natural ventilation, and other environmentally friendly features, and as much as possible, they are operated manually rather than by machine. These and other features truly make this a next-generation energy efficient building.
NTT Facilities Given Control of New-energy On-site Research at Expo 2005 Aichi, Japan
 Control & Monitoring System
The theme of Expo 2005 Aichi, Japan was "Nature's Wisdom." New Energy and Industrial Technology Development Organization (NEDO) conducted a New Energy Community Centered Research Project that had provided solar, fuel-cell, and other forms of new energy to supply the electricity used by the Japan Pavilion at the Expo's Nagakute venue. The NTT Energy and Environment Systems Laboratories and NTT Facilities were responsible for the Energy Control System for this project, which played one of the most vital roles in the research.
The amount of power that could be obtained via natural energy differed depending on the weather conditions, and these fluctuations could impact the interconnected power grids of concerned power companies. The project has built an energy-control system that controls the output of fuel cells and charge and discharge of storage batteries, thereby compensating for these fluctuation in natural energy, and minimizes the load on the grid. The amount of the new energy-based power accounted for about 10% of that used by the venue as a whole. NTT Facilities has long been committed to introducing clean energy. In recognition of its track record, it was given the most important role of the energy control system.
Eco-drive Campaign at the NTT West Group
 The NTT West Group Automobiles Carry the Declaration "People and Earth-friendly Car"
The NTT Group continues its campaign for idling stops, in an effort to reduce the CO2 emissions of company vehicles. In addition, the NTT West Group* began an Eco-drive campaign in fiscal 2004, in order to ensure environmentally friendly driving throughout the group.
Specifically, the group has created illustrated instructions on Eco-driving for every aspect of driving, including before and after driving and when the vehicle is stopped. Used to improve driving techniques and raise awareness, the materials are distributed to group employees, with a focus on employees who drive company vehicles.
As a further measure to raise employee awareness, the group is participating in the Eco-drive Declaration organized by the Japan Automobile Federation (JAF). About 50,000 employees have made the declaration, and are working to promote the Eco-drive campaign.
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- NTT West, each of the companies of the NTT MARKETING ACT Group, and each of the companies of the NTT NEOMEIT Group
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