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Updated on September 7, 2016

Reducing Greenhouse Gas Emissions

Greenhouse Gas Emissions Reduced by 41% from the Fiscal 2000 Level

  • Greenhouse Gas Emissions from Sites(Calculated in Terms of CO2)
Under the Green Management 2015 mid-term environmental targets, Sony worked to achieve an absolute reduction in greenhouse gas emissions (calculated in terms of CO2) of 30% or more from the fiscal 2000 level by fiscal 2015. Main efforts toward this end included striving to reduce greenhouse gases such as CO2 related to energy consumption and cutting emissions of perfluorocarbons (PFCs) and other gases. In fiscal 2015, the last year under Green Management 2015, Sony's emissions of greenhouse gases* (calculated in terms of CO2) totaled approximately 1.32 million tons. This represents an approximately 41% reduction from the fiscal 2000 level, although it was up 9.7% from the previous fiscal year. Greenhouse gas emissions per unit of consolidated net sales, or emissions intensity, were 0.11 tons of CO2/million yen in Japan and 0.05 tons of CO2/million yen outside Japan.

Under Green Management 2020, which started in April 2016, Sony is working on further energy-saving measures to achieve the new target for fiscal 2020 of reducing absolute greenhouse gas emissions at Sony sites by 5% compared to the fiscal 2015 level.

Greenhouse gas emissions figures in this section represent total emissions after the subtraction of emissions offset by the use of renewable energy.

CO2 Emissions from Energy Use at Sites

In fiscal 2015, emissions of CO2 from energy use at Sony sites*1 accounted for approximately 1.14 million out of the approximately 1.32 million tons of total emissions at Sony, up by about 91,000 tons from fiscal 2014. CO2 emissions resulting from the use of energy at sites in Japan amounted to approximately 725,000 tons,*2 an increase of approximately 103,000 tons from fiscal 2014. These results are mainly due to an increase in device production volumes. CO2 emissions resulting from energy use at Sony sites include emissions from fuel used by Sony-owned business vehicles. In fiscal 2015, CO2 emissions resulting from fuel used in vehicles amounted to approximately 22,000 tons.

Going forward, Sony will take efforts to restrict greenhouse gas emissions through infrastructure-related measures, including the installation of high-efficiency equipment and the promotion of energy recycling, and to enhance nonstructural measures, notably the introduction of training programs designed to foster energy-saving leaders.

This includes CO2 emissions from fuel use of business vehicles owned by Sony.
Taking into account changes in the CO2 conversion rate for the energy purchased in Japan, the amount of CO2 emitted as a result of energy use in fiscal 2015 was approximately 104,000 tons.

Emissions of PFCs and Other Greenhouse Gases

PFCs and other greenhouse gases with high global warming potential are used in cleaning and etching processes in the manufacture of semiconductors and LCD panels. Emissions of PFCs and other greenhouse gases in fiscal 2015 (calculated in terms of CO2) totaled approximately 171,000 tons, up about 25,000 tons from fiscal 2014. The main increase was attributable to an increase in device production volumes. Sony is taking further steps to reduce emissions, including installing gas abatement equipment.

Promoting Efficient Energy Use

To achieve its fiscal 2020 reduction targets, Sony is working on various energy conservation activities at its sites around the world. A sample of these initiatives follows.

Using Waste Heat from Air Conditioners in Semiconductor Cleanroom Facilities

  • The two-fluid humidification system releases mist.
Sony Semiconductor Manufacturing Corporation's Nagasaki Technology Center is working to improve air conditioning systems with the goal of conserving energy in cleanroom facilities used to manufacture semiconductors. Previous systems consumed a great deal of energy blowing clean air into cleanrooms and cooling down waste heat generated by the rooms' production equipment. Focusing on waste heat generated by this equipment, the center installed waste heat recovery equipment and a two-fluid humidification system to effectively use waste heat to power air conditioning equipment. By releasing mist to humidify and cool the room and facilitate transpiration that traps heat from the surrounding environment, two-fluid humidification establishes a system that is remarkably easy to control to ensure a stable air condition. Cleanroom facilities where semiconductors are manufactured must meet rigorous criteria, including precise humidity levels and temperatures. Utilizing two fluids, this humidification system not only meets these conditions, but also saves energy. The Nagasaki Technology Center capitalizes on the synergistic effect between the two-fluid humidification system and the use of recovered waste heat, which had previously been lost as surplus energy, to significantly reduce energy consumption in its cleanroom facilities. This initiative has become the new model for maintaining cleanroom humidity/temperature in the manufacture of semiconductors by Sony.

Effectively Using Waste Heat from the Production Process at Semiconductor Production Plants

  • A highly efficient heat recovery system was installed in the pure water room
Sony Semiconductor Manufacturing Corporation's Kumamoto Technology Center is working to save energy by effectively using the waste heat generated in its production processes. The center uses heated pure water in the semiconductor cleaning process, it had been burning municipal gas and fuel in a boiler to generate steam for heating the water. To save energy, the center switched to a hot water heating method by efficiently recovering the waste heat from manufacturing machinery and using it as the heat source. This resulted in a considerable reduction in energy consumption compared to before installation, equivalent to a decrease of about 880 tons of CO2.

The Eco Challenge Project: An Employee-Driven Initiative

Sony promotes a broad range of energy-saving efforts at its sites around the world. In addition to increasing the energy efficiency of buildings and equipment, in recent years Sony has actively promoted the Eco Challenge Project, a program for reducing energy consumption that centers on manufacturing site employees. This project focuses on the formulation and implementation of energy-saving solutions for manufacturing sites, which consume more electricity than any other part of Sony's manufacturing operations. Employees set ambitious project targets and take steps to shed light on energy consumed in different manufacturing processes. This enables employees to identify unnecessary uses of energy in such processes, as well as to develop and test solutions and, having confirmed the effectiveness thereof, to effect ongoing improvements. Particularly outstanding solutions are subsequently expanded to other sites.

The Eco Challenge Project was launched in 2009 at Sony Corporation's Sendai Technology Center and Sony Storage Media and Devices Corporation's Tagajo site, which led to both sites undertaking a number of distinctive initiatives. After their effectiveness was demonstrated, these initiatives were then widely adopted by other sites such as production plants in Japan, Malaysia, Singapore, Australia, Thailand, India, and China as well as offices and logistics operations in the Pan-Asia region.

As the project expanded in scope, Sony EMCS (Malaysia) Sdn. Bhd. KL Tec initiated its Sustainable Energy Management Program. In recognition of the program, the company was selected as 2nd runner up in the 2014 ASEAN Energy Awards in the Large Industry category under Energy Management in Building and Industry. In 2015, the factory once again won the ASEAN Energy Award for Energy Management in Buildings and Industries - Industry Special Submission (Process Improvement) Category.

  • Sony Technology (Thailand) Co., Ltd. optimized the number of computers used on its production line automatic mounting process, enabling it to reduce their number by one-third.

  • In collaboration with general affairs and technical development departments, Shanghai Suoguang Electronics Co., Ltd. is deploying its independently developed energy management system to manage electricity consumption in real time and control equipment overnight to save energy.
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