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Privacy Policy

1. Basic concept

The National Diet Library (NDL) pays close attention to protecting the privacy of its users in smoothly operating the NDL official website (the website provided under the following URL: https://www.ndl.go.jp/).
In addition, collected information is managed appropriately within the scope of "3. Purpose of use."

2. The scope of collected information

  • 2.1 The NDL official website automatically collects the following information of its users: Internet domain names, IP addresses, dates of access, accessed files, browsers, etc. We do not use cookies (information which is transmitted from the server to the users' browsers and then stored in the users' computers, for the server to identify the users).
  • 2.2 When users make inquiries using the Inquiry Form, the NDL official website requires its users to submit their names, email addresses, and the content of their inquiries. Submitting a user IDs and affiliated institutions are optional.
  • 2.3 In case of applying for events or of other necessary situations, the NDL official website may require its users to submit their names, email addresses, and other necessary information for the smooth operation of events.

3. Purpose of use

Information collected on the basis of 2.1 above is used as reference for the smooth operation of services provided via the NDL official website.
Information collected on the basis of 2.2 above is used by the NDL to process the inquiries and for reference in considering future measures. The content of inquiries may be forwarded to related departments in the NDL. Moreover, the NDL may use email addresses and other information to make responses or contacts.
Information collected on the basis of 2.3 above is only used for the smooth operation of the events concerned.

4. Restriction on use and provision

The NDL will never use the collected information for any purposes other than those stated in 3 above, nor will the NDL provide it to a third party, except for particular cases where there were legal disclosure requests, illegal access, or other unlawful actions.
However, the NDL may publish the statistical information of those mentioned in 2.1 above.

5. Measures to ensure security

The NDL takes appropriate measures in order to prevent the leakage, destruction, or damage of collected information.

6. Use of Google Custom Search

The NDL official website uses Google Custom Search. When the users use Google Custom Search, Google may collect the searched contents. For Google's policy on protection of personal information, please see "Privacy and Terms of Google" (link to the Google website.)

7. Use of content from Twitter and Facebook

The NDL official website uses content from Twitter and Facebook. When users who are logged in to Twitter or Facebook browse content, some information, such as their user IDs or the content they have browsed, may be collected by Twitter or Facebook even without clicking the share buttons. For Twitter's policy on protection of personal information, please see "Twitter Privacy Policy" (link to the Twitter website), and for Facebook's policy on protection of personal information, please see "Data Policy" (link to the Facebook website).

8. Scope of application

This Privacy Policy applies only to the NDL official website. Websites provided under the domain "ndl.go.jp" other than the NDL official website (e.g. NDL Search: http://iss.ndl.go.jp/) follow their own Privacy Policy accordingly.

9. Protection of private information by the NDL

Concerning the protection of private information of the entire NDL, please see "Protection of Personal Information."


Digital Information Distribution Division
Digital Information Department
National Diet Library

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