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Free Data Service

Bibliographic Data of the National Diet Library Digital Collections

The National Diet Library (NDL) provides basic metadata datasets of the NDL Digital Collections. These datasets include basic bibliographic data for books, periodicals, rare books, and old materials (title, volume, series title, edition, creator, publisher, publication year, ISBN or ISSN, extent (page number, size) and subject and classification (NDC, NDLC, subject, Old Material Classifications)) as well as for digitized images (URL and terms of use). There are also datasets of doctoral dissertations digitized by NDL (title, creator, university (degree grantor), year granted, URLs of digitized images and terms of use), as well as those of Historical Recordings Collection (product number, title, lyricist, composer, artist/performer, label name, release date, genre, and the URLs of digitized recordings).

  • (1)Metadata of books, periodicals, rare books and old materials and doctoral dissertations are dated July 23, 2019. Those of Historical Recordings Collection are dated November 27, 2019. The information for bibliographic items, access restrictions, or other attributes is subject to change. For the latest information, please see the NDL Search or the NDL Digital Collections. Furthermore, NDL Search and the NDL Digital Collections support only a limited number of concurrent requests to prevent server overload. Access might not be available when web traffic is heavy.
  • (2)There are no restrictions on the use of these metadata datasets, except for digital images and digital recordings referenced by these metadata. NDL assumes no responsibility or liability for any actions taken as a result of using these datasets.
  • (3)Although the volumes and publication year indicate the first and the last year of digitized serials, this does not mean that all volumes published during the intervening years have been digitized, and some might be missing. There are two separate datasets, based on access restrictions: "Available only at the NDL and partner libraries" and "Available only at the NDL." When access restrictions differ across different volumes of a single serial, the titles are included in both datasets.
    Material type Access Restriction
    Available Online 1 Available only at the NDL and partner libraries 2 Available only at the NDL 3
    Books xlsx format: 32.0 MB
    tsv format (zip): 11.6 MB
    approx. 354,000 items
    xlsx format (part 1): 29.0 MB
    xlsx format (part 2): 25.7 MB
    tsv format (zip) (part 1): 11.2 MB
    tsv format (zip) (part 2): 9.9 MB
    approx. 567,000 items
    xlsx format: 6.7 MB
    tsv format (zip): 2.4 MB
    approx. 73,000 items
    Rare Books and Old Materials xlsx format: 5.2 MB
    tsv format (zip): 1.5 MB
    approx. 80,000 items
    xlsx format: 1.0 MB
    tsv format (zip): 235 KB
    approx. 18,000 items
    xlsx format: 5 KB
    tsv format (zip): 0.6 KB
    4 items
    Serials xlsx format: 13 KB
    tsv format (zip): 4 KB
    74 items
    xlsx format: 1.0 MB
    tsv format (zip): 480 KB
    approx. 11,000 items
    xlsx format: 311 KB
    tsv format (zip): 147 KB
    approx. 3,000 items
    Doctoral Dissertations xlsx format: 1.2 MB
    tsv format (zip): 814 KB
    approx. 15,000 items
    xlsx format: 9.9 MB
    tsv format (zip): 6.5 MB
    approx. 117,000 items
    xlsx format: 799 KB
    tsv format (zip): 508 KB
    approx. 10,000 items
    Historical Recordings Collection 4 xlsx format: 322 KB
    tsv format (zip): 138 KB
    approx. 5,000 items

    Notes:

    1. Datasets that are available online include the bibliographic data of digital images in the NDL Digital Collections (1) which are in the public domain due to copyright expiration, (2) for which permission was granted by the copyright holder, or (3) for which permission was granted by the Commissioner of the Agency for Cultural Affairs.
    2. Datasets of books, rare books and old materials, serials and doctoral dissertations that are available at both the NDL and its partner libraries are bibliographic data of digital images which are not available online and for which the original source is out-of-print or otherwise difficult to obtain. The images may be viewed on the premises at either the NDL or one of its partner academic or public libraries.
    3. Dataset that are available only at the NDL are bibliographic data of digital images available only on the premises at the NDL.
    4. The datasets of Historical Recordings Collection's bibliographic data which are available only at the NDL and partner libraries and those that are available only at the NDL are the same. It contains bibliographic data of recordings, whose right of public transmission has not been cleared. These recordings are available only at the NDL and the Historical Recordings Collection partner libraries.

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Bibliographic Data of Japanese Publications (Most Recent Year)

The National Diet Library (NDL) provides basic metadata dataset of the publications published in Japan. That dataset includes basic bibliographic data (material type, National Bibliography Number, ISBN or ISSN, title, creator, edition, series title, publication information, size and duration) and NDL Online URL.

  • This bibliographic data is metadata about Japanese publications; domestic publications and foreign publications in Japanese. The bibliographic data cataloged by the NDL in the year (from January to December) is included.
  • The information of the bibliographic items is subject to change. There are some cases in which the URL does not navigate to the page of the NDL Online.
  • In the Material Type (FMT), there are six types: Books (BK), Computer files (CF), Maps (MP), Music (MU), Serials (SE), Visual materials (VM).
  • There are no restrictions on the use of the metadata dataset. NDL assumes no responsibility or liability for any actions taken as a result of using the dataset.

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Bibliographic ID List

The National Diet Library (NDL) provides the bibliographic data through online services such as the NDL Online, the NDL Search, the NDL Digital Collections. They include different bibliographic items and different target materials. For more efficient use of the bibliographic data, the NDL provides the list of identifiers (IDs) which could integrate individual bibliographic data.

  • (1)The list includes the following IDs:
    • NDL Bibliographic ID (NDLBibID)
    • National Bibliography Number (JPNO)
    • International Standard Book Number (ISBN)
    • Permanent identifier added by the NDL (NDLJP) (PID)
    For further details, please see the About Bibliographic ID List (txt: 6KB) (Japanese).
  • (2)The list was made from bibliographic data, dated December 17, 2018. The data are subject to change. For the latest data, please see the NDL Search or the NDL Digital Collections. Furthermore, NDL Search and the NDL Digital Collections support only a limited number of concurrent requests to prevent server overload. Access might not be available when web traffic is heavy.
  • (3)There are no restrictions on the use of the list. NDL assumes no responsibility or liability for any actions taken as a result of using the list.
  • Bibliographic ID List (The dataset is divided into 2 files.)

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Beta version of International Standard Identifier for Libraries and Related Organizations (ISIL) LOD

The ISIL (International Standard Identifier for Libraries and Related Organizations) is an identifier which can be allocated to libraries and relevant organizations, such as archives and museums. The NDL operates the National Agency for ISIL in Japan and provides ISIL LOD as part of its initiatives to promote LOD. Please contact us if you have any inquiries or opinions.
This ISIL LOD is version 1.2 Beta.
There are no restrictions on use of these public domain datasets.

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Bibliographic Data of Books on Japan in Foreign Languages (Beta version)

The National Diet Library (NDL) has been acquiring books on Japan in foreign languages published in and out of the country. This dataset includes selected fields of bibliographic data for such books (bibliographic ID, title, creator, edition, place of publication, publisher, publication date, publication year, page number and size, series title, ISBN, language code, country code, NDLC, NDL call number, URL of the bibliographic record).

  • (1)This dataset contains bibliographic data the NDL created between 2015 and 2017 for the books in the following categories:
    • Books on Japan in Western languages
      • Books in Western languages on the subjects related to Japan
      • Books in Western languages authored by Japanese or Japanese descents
    • Books on Japan in Asian languages
      • Books in Asian languages on the subjects related to Japan
      • Books in Asian languages authored by Japanese or Japanese descents
    • Children's books on Japan published in other countries
      • Children's books in foreign languages on the subjects related to Japan
      • Children's books in foreign languages authored by Japanese or Japanese descents
      • Japanese children's books translated into foreign languages
  • (2)This bibliographic data is dated March 15, 2019.
  • (3)There are no restrictions on the use of the dataset. The NDL assumes no responsibility or liability for any actions taken as a result of using the dataset.
  • (4)A catalog of books on Japan in Western languages has been provided via "Books on Japan" on the Web. This dataset has stretched the scope of "Books on Japan" on the Web, by including the books of the equivalent categories in Asian languages and/or targeting Children as major audience.

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Contact for inquiries about Free Data Service

Standardization Section, Digital Information Distribution Division,
Digital Information Department, National Diet Library
E-mail: standardizationat n d l dot g o dot j p

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