Help : Use of bibliographic data & API

Frequently asked questions

Q: What kind of bibliographic data is available online?
A: Please see "How to Get Bibliographic Data > Bibliographic Data Services".

Q: Is bibliographic data available for purchase?
A: NDL bibliographic data is available free of charge from various web services. Please see "How to Get Bibliographic Data".

Q: Do I need to submit an application to use NDL bibliographic data?
A: No application is required regardless of purpose or number of titles. Please see "Using Bibliographic Data" for further details.
Please see "APIのご利用について (Using the API)" (in Japanese) for details on using the NDL Search API.

Q: What should I do to use an API （externally-provided interface) ?
A: For API provided by the National Diet Library, please see the page "List of API".

Q: Are there any statistics on bibliographic data?
A: Please refer to "統計からみた書誌データ(Statistics of bibliographic data)" (in Japanese).

Q: What is the Japanese National Bibliography?
A: 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.