NGK Insulators

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NGK Insulators, Ltd.
Native name
Romanized name
Nihon Gaishi kabushiki gaisha
Type Public KK
IndustryGlass and Ceramics
PredecessorSpun-off from Toyo Toki
Founded5 May 1919 (1919-05-05)
Key people
Shun Matsushita, President and CEO
Masaharu Shibata, Chairman [1]
Products Insulator (electrical)
Sodium-sulfur batteries (grid energy storage)
RevenueIncrease2.svg ¥119,976 million (2010)
Increase2.svg ¥16,551 million (2010)
Increase2.svg ¥10,983 million (2010)
Total assets ¥313,591 million (2010)
Number of employees
3,272 [1]
Parent Morimura Group
Head office NGK Insulators LTD 01.JPG
Head office

NGK Insulators, Ltd. (日本碍子株式会社, Nihon gaishi kabushikigaisha) (TYO : 5333) 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

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]

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  1. 1 2 "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. 1 2 NGK Insulators, Ltd. (2011). "NAS Batteries" . Retrieved 1 August 2011.
  6. 1 2 NGK Insulators, Ltd. (2011). "Reference Installations" . Retrieved 1 August 2011.

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