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New Five-Year Environmental Action Plan and Environmental Products

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  • New Five-Year Environmental Action Plan
  • Environmental Products
Promoting environmental contribution through products

Sales from products that contribute to the environment

NGK has set a target of increasing the sales of products that contribute to environmental protection, as internally defined, by at least 60% by fiscal 2020 from the base year of fiscal 2013 while maintaining the sales composition at 50% or above. This target aims at attaining business growth and expanding environmental contribution at the same time.

Contribution to widespread use of renewable energy

NAS® battery

NAS battery facilitates widespread use of renewable energy

One of the most frequent uses of the NAS battery is stabilizing renewable energy. While electricity from renewable sources, such as wind and solar power, is clean and, in principle, unlimited, its major limitation is that its output is affected by weather conditions, resulting in unstable output. The NAS battery solves this limitation by storing excess renewable energy when renewable generation exceeds demand, and supplying stored energy to the grid when renewable output is low or demand is high. With a NAS battery, intermittent renewable energy becomes stable and dispatchable, and available 24 hours a day. NAS systems enable global growth in stable renewable energy and thereby help electricity utilities worldwide reduce their environmental footprint.

NAS systems are the world's most popular grid-scale battery storage

 Increasing importance of renewable energy

NGK was the world's first manufacturer to commercialize the NAS battery megawatt-class electricity storage system. Featuring a large capacity, high energy density and long life. The battery can support reliable, long-term stable supply of electricity. Also, the NAS system allows a more compact housing compared with the conventional lead-acid battery

Future development for the NAS battery

To create a sustainable society

I am focusing on the recent marketing trend to shift from selling individual products to offering packaged systems. For NAS batteries, I am striving to build system packages, rather than providing the individual product, by adding related functions to meet the specific needs of individual customers for solving issues. I expect that demand for large-capacity power storage systems will increase to meet needs related to stable electricity supply of renewable energy, which will be introduced broadly in coming years. I will work to sell more NAS batteries so that the products will demonstrate their intended functions to support the introduction and expansion of renewable energy use, as a way of contributing to society.

Daisuke Umino

Automotive exhaust gas purification

Diesel particulate filter (DPF)

Remove PM from exhaust gas

DPF is a porous ceramics filter used in the exhaust system for the diesel vehicles in the world. With a fine pore structure, the filter ensures particle matters (PMs) are captured to purify exhaust gas emitted from diesel vehicles. NGK is the only company to -produce two types of DPFs based both on cordierite and silicon carbide. Utilizing its ceramics technologies, NGK supports further developments of diesel vehicle.

Capture PM with fine pore structure

The honeycomb structure, where the inlet and outlet of the through-holes are alternately sealed, enables the thin ceramic walls to effectively capture PM while exhaust gas runs through them.

Eliminates up to 99% of PM

Future development for DPF

To create a cleaner air environment

When visiting cities plagued by serious air pollution in Asia and other emerging regions, I strongly feel each time that urgent measures are necessary to improve the deteriorated conditions, and NGK's DPFs can address this need in these cities. Our products can help even more widely, creating a cleaner air environment around the world. Demand for DPFs remains strong and is expected to grow in response to the likely tightening of automobile exhaust gas regulations. As a responsible, leading DPF manufacturer, we will ensure a reliable supply of products as well as the timely launch of new products to cater to customer needs effectively.

Ryutaro Shindo


Indispensable function for automotive exhaust gas purifier

HONEYCERAM is a ceramic substrate for catalytic converters to purify harmful contents in exhaust gases from automobiles. The products' honeycomb structure is effective for carrying catalyst to detoxify harmful substances by chemical reaction. Since the launch of its commercial production in 1976, the product has been supplied globally over years as essential part for meeting the automobile exhaust gas regulations that become more stringent and cover wider in criteria. Production has grown to record a cumulative shipment exceeding 1.2 billion units, while expanding manufacturing bases to a current total of eight countries in North America, Asia and Africa. HONEYCERAM is an indispensable component of automobiles, an essential invention that supports enriched modern lifestyles.

4 million tons annually

Honeycomb structure demonstrating a effective purifying performance

NGK's HONEYCERAM production eliminates a total of of NOx per annum*1, equivalent to double the annual NOx emissions in Japan*2.

4 million tons annually

NOx sensors

For long-term high-accuracy measurement

NGK has developed the world's first in-vehicle sensor to measure concentrations of nitrogen oxides (NOx) in exhaust gas in real time with high precision. Specifically, the sensor is capable of measuring NOx concentrations at the parts per million (ppm) level and can thus detect even very small amounts of the gases. The sensor supports precise control of the exhaust purification device of diesel vehicles, which leads to a reduction in NOx emissions and thus helps to promote the use of clean diesel vehicles.

Parts per million level

NOx sensors

Future development of NOx sensors

Contributing to the advancement of clean diesel vehicles

The NOx sensor business has achieved remarkable growth over recent years as exhaust gas regulations around the world have become more and more stringent. We are now developing and releasing a series of new-type sensors to help increase the environmental performance of clean diesel vehicles. We will continue to create environment-friendly products to meet the needs of customers and society at large and deliver them to people across the globe, thereby contributing to a better social environment.

Dr. Daniel Siegberg

Treatment of low-level radioactive waste

Low-level radwaste treatment system

To ensure safe treatment of radioactive waste

NGK has developed a wide range of systems to safely treat low-level radioactive waste generated from nuclear facilities, utilizing its proprietary incineration technology and dust collection technology by ceramic filter, and have supplied these systems to nuclear power stations and related institutes across Japan.
We undertake many of engineering projects including design, manufacturing, and site construction, and also provide a long-term maintenance service to deliver the stable and high-level radioactive decontamination. Therefore, NGK provides essential support for safe and stable operation of nuclear facilities.
In addition, we focus on the development of new systems for treating various types of radwaste expected to be generated from the decommissioning and demolition of aging nuclear reactors.

Importance of treating radioactive waste

Low-level radwaste treatment systems

The performance level of radioactivity removal;

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