Terms of Use

These websites (https://www.ngk.co.jp, https://www.ngk-insulators.com, https://www.ngk-global.com) are operated by NGK Insulators, Ltd. ("NGK" hereinafter). Carefully read the Terms and Conditions of Use set forth below before using these websites. If you do not agree with these terms, please refrain from using these sites.

NGK reserves the right to amend the following Terms and Conditions of Use. Please review the latest updates periodically. Use of these sites following any amendment of the Terms and Conditions of Use constitutes consent to such amendments. If any part of the Terms and Conditions of Use is found invalid, in violation of laws or regulations, or otherwise inapplicable, all other Terms and Conditions shall remain applicable and binding.

Use of these websites

Actions that result in or are likely to result in disadvantage or harm to any third party or to NGK, actions inconsistent with societal norms and public standards, and any use of these websites for commercial gain are strictly prohibited.


Copyrights and other rights to the information on these websites are owned by NGK and the original holders of the copyrights or other rights. Duplication or plagiarism of any of the content published on these sites, in whole or in part, beyond the extent allowed for personal use or other uses permitted under the Copyright Act, is strictly prohibited. The information on these websites (i.e., textual information as well as logos, illustrations, audio, images, and website designs and layouts) may not be reused (including duplication, plagiarism, modification, redistribution, or rebroadcast) without the express consent of NGK.

Copyrights to the KUROKO character appearing on these websites as NGK's advertising character belong to NGK and to TYO Inc., Dwarf Division.
© NGK, kero/dwarf


The NGK name, NGK logos, NGK product names, and other names used on these websites are the trademarks or registered trademarks of NGK (including those used under license from other companies). Other product and company names found on these websites are the property of the respective trademark owners. Any unauthorized reuse or reproduction of the trademarks and registered trademarks used on these websites is strictly prohibited.

Handling of personal information

Personal information collected through these websites is handled in accordance with the NGK Group Privacy Policy. Click here to view thePrivacy Policy. These sites handle personal information as described below.

  • These websites use Secure Sockets Layer (SSL) encryption to protect users' personal information. To prevent leakage, misuse, or unauthorized alteration of personal information through improper access by third parties, these sites employ firewalls, antivirus technologies, and other practical security measures.
  • These websites use cookies to enable more convenient services for users. Information contained in cookies, such as records of pages viewed by users, is anonymous and cannot be used to identify specific individuals. Users may change their browser settings to refuse to accept cookies. For more information concerning the use of cookies, see the Cookie Policy.
  • These websites record information on users in access logs. Access logs contain records of information such as IP address, type of browser and operating system, and date and time of access. This information cannot be used to determine a user's identity.

Linking to these websites

Please use Contact Us to request NGK's permission before linking to these websites.

Handling of linked sites

The content of sites operated by non-NGK third parties linked from or to these websites ("linked sites" hereinafter) is managed by the respective companies. When using linked sites, please comply with the Terms and Conditions of Use, copyrights, and other provisions of each site. NGK rejects any and all liability for the content of linked sites or for any damages arising from use of such sites.

Proposals from users

Except when actively seeking proposals from customers, NGK does not accept any ideas submitted by users through Contact Us forms or other features of these websites with regard to technical matters, sales, products, or other topics. We ask for the understanding of our users in this matter.
NGK rejects any obligations and liability concerning confidentiality, evaluations, payment, or other aspects of any user proposals.


NGK employs the utmost care in posting information to these websites. Nevertheless, it provides no guarantees regarding the accuracy, security (including freedom from the interruption or suspension of services or features provided on these websites, absence of errors, corrections of errors, or the absence, on these websites and their servers, of computer viruses or other harmful content), suitability for specific purposes, or legality of such information.

NGK shall not be liable for any damages resulting from access to or use of these websites.

Recommended browsers

We recommend the following environments for optimal functionality and the best viewing experience:

  • Microsoft Edge, latest version
  • Google Chrome, latest version
  • Mozilla Firefox, latest version
  • Safari, latest version
  • Google Chrome, latest version
  • iOS 10.0 or higher
  • Safari, latest version
  • Google Chrome, latest version
  • Android OS 5.0 or higher
  • Google Chrome, latest version

Please set your browser to use TLS 1.2 or higher when viewing the pages of these websites.

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Applicable law and court with jurisdiction

Except where otherwise specified, use of these websites and the interpretation and application of these Terms and Conditions of Use shall be governed by the laws of Japan. Except where otherwise specified, the Nagoya District Court shall be the exclusive court of first instance for any and all disputes arising in connection with the use of these sites.