Help : Use of bibliographic data & API
Frequently asked questions
Q What kind of bibliographic data is available online?
Q Is bibliographic data available for purchase?
Q Do I need to submit an application to use NDL bibliographic data?
Q What should I do to use an API（externally-provided interface) ?
Q Are there any statistics on bibliographic data?
Q What is the Japanese National Bibliography?
NDL bibliographic data is available free of charge from various web services. Please see "Terms of Use of Contents of the National Diet Library's Website".
No application is required regardless of purpose or number of titles. Please see "Using Bibliographic Data" for further details.
Please see "How to use NDL Search API" for details on using the NDL Search API.
For API provided by the National Diet Library, please see the page "List of API".
Please refer to "統計からみた書誌データ(Statistics of bibliographic data)" (in Japanese).
The Japanese National Bibliography comprises standard bibliographic data for Japanese publications acquired via the legal deposit system as well as Japanese publications and foreign publications in Japanese acquired through donation, purchase, or other means. The National Diet Library makes Japanese National Bibliography records available from a number of sources to promote new publications promptly and widely. Please see "The Japanese National Bibliography (JNB)" for further details.