NGK Insulators

Not to be confused with the former NGK Spark Plug Co. (1936-2022), which spun off from NGK Insulators in 1936 and as of 2023 is known as Niterra..

NGK Insulators, Ltd.

Native name

| 日本碍子株式会社

Romanized name

| Nihon Gaishi kabushiki gaisha
Company type| Public KK

Traded as

* TYO: 5333
* NAG: 5333
* Nikkei 225 component

Industry| Glass and Ceramics
Predecessor| Spun-off from Toyo Toki
Founded| 5 May 1919 (1919-05-05)
Headquarters|

Nagoya

Japan

Key people

| Shun Matsushita, President and CEO
Masaharu Shibata, Chairman[1]
Products| Insulator (electrical)
Sodium-sulfur batteries (grid energy storage)
Revenue|  ¥119,976 million (2010)

Operating income

|  ¥16,551 million (2010)

Net income

|  ¥10,983 million (2010)
Total assets| ¥313,591 million (2010)

Number of employees

| 3,272[1]
Parent| Morimura Group
Website| www.ngk.co.jp/english/index.html
Head office

NGK Insulators, Ltd. (日本碍子株式会社, Nihon gaishi kabushikigaisha) is a Japanese ceramics company. It primarily produces insulators but also produces other products, especially ceramic products. NGK is headquartered in Tokyo (Marunouchi Bldg. 25F, 2-4-1, Marunouchi, Chiyoda-ku, Tokyo 100–6325) and is listed on the Nikkei 225, which is an index of the Tokyo Stock Exchange.[2] It is also listed in the Osaka Securities Exchange, the Nagoya Stock Exchange, and the Sapporo Securities Exchange all under listing code 5333.[3][4] NGK stands for Nippon (Japan) Gaishi (insulator) Kaisha (company).

## Sodium-sulfur batteries[edit]

NGK Insulators is known-worldwide for the development of sodium-sulfur batteries in cooperation with TEPCO.[5] NGK's NaS battery systems are being used worldwide, primarily in Japan and the United States.[6]

NGK Insulators markets its NaS batteries for use as grid storage (especially for use in conjunction with renewable energy sources such as wind and solar). The battery systems can be used for both peak shaving, load leveling, emissions reductions, and as emergency power supplies. The "typical system" (as defined by NGK) is composed of 40 50-kW units for a total system capacity of 12,000 kWh.[5]

NGK's systems are currently used worldwide, both as grid storage and as a supplement to wind and solar installations. System capacities range from 1.5 to 34 MW.[6]

## See also[edit]

* NGK
* Tokyo Electric Power Company

## References[edit]

1. ^ a b "Corporate Outline". NGK Insulators.
2. ^ "Nikkei Constituents". NIKKEI. Retrieved 11 November 2010.
3. ^ "Investor Relations". NGK Insulators. Retrieved 23 December 2010.
4. ^ "NGK INSULATORS, LTD. (Public, TYO:5333)". Google Finance. Retrieved 23 December 2010.
5. ^ a b NGK Insulators, Ltd. (2011). "NAS Batteries". Retrieved 1 August 2011.
6. ^ a b NGK Insulators, Ltd. (2011). "Reference Installations". Retrieved 1 August 2011.

## External links[edit]

Media related to NGK Insulators at Wikimedia Commons

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