NTT group's approaches to energy reduction

With the growth of ICT society, the amount of electrical power used by telecommunication companies has been on an upward trend in recent years. To reduce cost and the burden on the environment, the NTT group has been working to reduce and control the use of electrical power through the Total Power Revolution (TPR) Campaign since 1997. In particular, the earthquake disaster of 2011 resulted in a sharp rise in the price of electricity that caused a major problem in business profits for the NTT Group, which accounts for about 1 % of the power consumption in Japan. To deal with these energy-related problems, we have improved operations by promoting energy management, introducing telecom equipment, power supply systems, and air conditioning systems that have high energy efficiency, and improving the air flow for air conditioning, etc. The various activities achieved a total reduction in power use of 4.18 billion kWh over the period from 1998 to 2012. In 2012, the power used was reduced by 0.93 billion kWh. This article describes the efforts of the NTT Group to reduce power consumption.