National Diet Library Digital Collections

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Frequently asked questions regarding the use of the National Diet Library Digital Collections

※As for reproduction of the contents of this database, please refer to: Frequently asked questions : Utilizing the contents of the website.
As for photoduplication services, please refer to:Frequently asked questions : Copying without visiting the Library (Remote).

FAQ


【Questions about General Matters】

  1. What kinds of resources are available at the "National Diet Library Digital Collections"?
  2. Can I insert a link to the "National Diet Library Digital Collections"? Which URL can I use to insert a link?
  3. Where can I find materials marked "Available only at the NDL and partner libraries"?
  4. Where can I find materials marked "Available only at the NDL"?
  5. How can I use materials marked "Available only at the NDL" or "Available only at the NDL and partner libraries" when I cannot visit any access point?
  6. Where can I access materials of the Historical Records Collection marked "Available only at the NDL"?

【Questions about Search/View Functions】

<About Search>
  1. Where can I find detailed instructions on how to search/view the contents of this database?
  2. How can I exclude the materials which are not available via the Internet from the search results?
  3. Does the system distinguish between upper/lower cases, Hiragana/Katakana, contracted sounds, choked sounds, full/half-width, and variants of Chinese characters?
  4. In the result list, different volumes of the same journals/magazines are listed. Can I aggregate the volumes under the same title?
  5. How do I perform a title search for a prefix, an exact match, or a phrase?
  6. Is it possible to search for the sub-classifications as indicated by decimal places in the Nippon Decimal Classification (NDC)?
<About View Functions>
  1. Are there any tips to improve the viewing experience?
  2. How can I zoom in and out of the image?
  3. How can I read the PDF materials more clearly?
  4. What can I do when images do not appear?
  5. Images do not appear after I click on the "JPEG View". How can I solve this problem?
  6. Images cannot be rendered in full resolution. How can I solve this problem?
  7. Why are there some books for which links to the previous volume and next volume appear in the upper right of the viewer, while for others they do not?
  8. Why do some books have no text data for the table of contents despite the original hard copy having a table of contents?
  9. What do the symbols 〓, @, and ◇ mean in the table of contents?
  10. Why are there cases where the older issues of a serial are provied under the category "Periodicals", while the newer issues are located under the category "Online publications"?

【Questions About Image Specifications】

  1. Why is it that some items are in black-and-white, while others are in color?

【Questions about Print Functions】

<About Print Functions for the materials available via the Internet>
  1. Can I print out or save the digitized materials?
  2. How can I create PDF files?
  3. I have trouble either displaying or printing out PDF files. The images are either not full or crooked. What should I do?
  4. Why are there items on which the "Print" or "JPEG View" buttons do not appear on the Viewer?
  5. Why is there a limit to the number of frames that can be printed at one time?
  6. I wish to save PDF files, but they open by default. Can you improve this function?
  7. It takes time to create PDF files.
<About printing the materials not available via the Internet>
  1. I want to get a copy of a material not available via the Internet. What should I do?
  2. Rather than by mail, I would like copied material sent to me via email as a PDF. Or can you send it to me via fax?

【Other Questions】

  1. Who should I notify if I find mistakes concerning bibliographic information, the table of contents, etc.?
  2. Who should I notify if I find an unclear image or if the material is missing some pages?
  3. Why are some materials available via the Internet, while others are not, although written by the same author?
  4. What do the terms 保護期間満了, 許諾, and 裁定mean in the Access Restrictions field of materials that are available online?
  5. I wish to reproduce an image from the "National Diet Library Digital Collections" whose "Access Restriction" of the Bibliographic Information Area does not show "インターネット公開". What should I do?
  6. Is there a list of materials provided via the NDL Digital Collections?
  7. Is there a way to automatically search and obtain bibliographic data from the system?
  8. What kind of materials are preferentially digitized?

Answers

【Questions about General Matters】

  1. What kinds of resources are available at the "National Diet Library Digital Collections"?
  2. Can I insert a link to the "National Diet Library Digital Collections"? Which URL can I use to insert a link?
    • You can freely link the National Diet Library Digital Collections.
      When attempting to link a particular item, use the URL shown in the browser. (The format of the URL: http://dl.ndl.go.jp/info:ndljp/pid/{NUMBER})
      When attempting to link a particular image of an item, click on the button "URL" in the Content Area, and obtain the specific URL of the image. (The format of the URL: http://dl.ndl.go.jp/info:ndljp/pid/{NUMBER}/{FRAME NUMBER})

      For linking, the banners below are available.
      The National Diet Library Digital Collectionshttp://dl.ndl.go.jp/

  3. Where can I find materials marked "Available only at the NDL and partner libraries"?
    • This material is available only within the facilities of the NDL and on the site of the partner libraries in Japan.

  4. Where can I find materials marked "Available only at the NDL"?
    • This material is available only within the facilities of the NDL.

  5. How can I use materials marked "Available only at the NDL" or "Available only at the NDL and partner libraries" when I cannot visit any access point?
    • You may apply for our remote photoduplication service, if the specific pages to be copied are clear. Following materials are excluded.
      • Doctoral dissertations for which degrees were conferred in or after April 2013
      • Historical Recordings Collection
      • Science Film
      • Online Publications

  6. Where can I access materials of the Historical Records Collection marked "Available only at the NDL"?

 【Questions about Search/View Functions】

<About Search>
  1. Where can I find detailed instructions on how to search/view the contents of this database?
    • Detailed instructions can be found at the "Help" page.

  2. How can I exclude the materials which are not available via the Internet from the search results?
    • You could conduct targeted search by removing the check on the "Available Online" checkbox before searching, or by using the refined search on the left side of the page after the search results are shown.Detailed instructions can be found at the "Help" page, under "1-1. Keyword Search." or "2-1. Search Results.".

  3. Does the system distinguish between upper/lower cases, Hiragana/Katakana, contracted sounds, choked sounds, full/half-width, and variants of Chinese characters?
    • This system does not distinguish between the following:
      • Alphabet (Upper/Lower cases, Full-/Half- width)
      • Hiragana/Katakana
      • Numbers (Full/Half width)
      • Yo-on (Contracted sound) / Soku-on (Choked Sound)
      • Variants of Chinese Characters (example: 竜 or 龍)
      For details, please read section "1-3. Search Tips (1)Normalization of Characters".

  4. In the result list, different volumes of the same journals/magazines are listed. Can I aggregate the volumes under the same title?
    • Please click on "Aggregate items of the same title" in the left-hand culumn of the Search Result.

  5. How do I perform a title search for a prefix, an exact match, or a phrase?
    • Note: The title search function does not search tables of contents, body texts, abstracts, summaries, or republications.

      Searching titles for a prefix
      Please put a forward slash (/) in front of the search string.
      E.g. To find materials with titles that begin with the Japanese word図書館 (toshokan, library), input the search string /図書館. Only materials with titles that begin with 図書館 (for example, 図書館, 図書館の歴史, 図書館学概論) will appear in the search results.
    • Searching titles for an exact match
      Please put a forward slash (/) before and after the search string.
      E.g. To find materials with the exact title 図書館, input the search string /図書館/. Only materials with the title 図書館 will appear in the search results.
    • Searching titles for a phrase
      Please enclose the search string in quotation marks (“”).
      E.g. To find materials with titles that contain the phrase ‘library work,’ input the search string “library work”. Only materials with titles that contain the phrase ‘library work’ will appear in the search results. In contrast, materials with a title that contains the phrase “work in library” will not appear.
    • It is not possible to search for suffixes.

  6. Is it possible to search for the sub-classifications as indicated by decimal places in the Nippon Decimal Classification (NDC)?
<About View Functions>
  1. Are there any tips to improve the viewing experience?
    • The Image Viewer has the following functions. Using shortcut keys may improve your experience.
      <Shortcut keys to turn pages>Use "←" and "→" to go to the previous and the next page respectively. Other useful shortcut keys are introduced in the section "b-1. Image Viewer" of the "Help" page.
      <Hide the Bibliographic Information Area to expand the Content Area>"Metadata" and "Analysis" shown on the left-hand side can be hidden by clicking on the respective tab, so that you can have a wider "Content Area" on which images are displayed.
      <Expand the area where images are shown>Click on the button "Resize Viewer" to set the desirable image area size by pixels. Please set the viewer size to fit the display size of your PC and press the F11 key to have the largest whole image shown on your screen.
      <Full Screen View>Click on the button "Full Screen ON" or use the shortcut key "f" to display the image as large as the window size. To fit the window size to the display size, please click on "F11".
      <Zoom In/Out>By using the mouse wheel, you can zoom in and out by 6%→13%→25%→50%→100%→200%. To zoom in/out by 1%, click on the zoom bar shown above and press "←" and "→" to zoom out and in respectively.

  2. How can I zoom in and out of the images?
    • By turning the mouse wheel, you can zoom in and out of the image by 5% from 1 to 30%, and by 40%, 50%, 75%, 100%, 125%, 150%, 200%. When you would like to adjust it more accurately, you may use the zoom bar above the view window.

  3. How can I read the PDF materials more clearly?
    • You can adjust the image by using your PDF viewer.

  4. What can I do if images do not appear?
  5. Images do not appear after I click on the "JPEG View". How can I solve this problem?
    • Depending on the memory size of your computer, rendering of large size JPEG images may not be completed successfully. Please try again after closing other applications, or choose smaller image size.

  6. Images cannot be rendered in full resolution. How can I solve this problem?
    • Images of some items, especially those of rare books and old materials, can be as large as a couple of megabytes. Depending on the memory size of your computer, rendering may not be completed successfully. Please try again after closeing other applications, or view in JPEG format by clicking the button "JPEG View".

  7. Why are there some books for which links to the previous volume and next volume appear in the upper right of the viewer, while for others they do not?
    • There are some rare books or old materials for which multiple volumes have been cataloged as a single bibliographic entry. In such a case, there are links to the previous and next volumes.
      E.g. All three volumes (上巻,中巻,下巻) of "吾輩ハ猫デアル"have been cataloged in a single bibliographic entry.
      On the other hand, modern publications are always cataloged with individual bibliographic entries for each volume. You can find related volumes by clicking the Find Other Volumes link in upper right corner of the viewer to display books with the same title and publisher.
      E.g. "PBリポート所蔵目録. 第1巻"

  8. Why do some books have no text data of the table of contents despite the original hard copy having a table of contents?
    • The NDL does not make text data of the table of contents concerning the following materials:
      • Multiple volumes rebound in one volume
      • Complete collections or series which have an independent volume for the table of contents
      • If the table of contents is illegible due to stains or defacement.

  9. What do the symbols 〓, @, and ◇ mean in the table of contents?
    • These symbols represent characters that are either illegible or do not exist in UTF-8, which is the character code in which the NDL Digital Collections are encoded.

  10. Why are there cases where the older issues of a serial are provied under the category "periodicals", while the newer issues are located under the category "internet resources"?
    • Issues digitized from a hard copy are categorized as "periodicals", while born-digital issues collected from the websites of publishers are categorized as "internet resources".

【Questions About Image Specifications】

  1. Why is it that some items are in black-and-white, while others are in color?
    • Items digitized from microfilms are in black-and-white, while those digitized form original hard copies are in color.

【Questions about Print Functions】

<About Print Functions for the materials available via the Internet>
  1. Can I print out or save the digitized materials?
    • The "Print" button appears on materials that can be printed or saved. You can print or save the PDF file by using the "Print" button, or by saving the image by using the "JPEG View" button.

  2. How can I create PDF files?
    • You can create PDF file by "Print" button.

  3. I have trouble either displaying or printing out PDF files. The images are either not full or crooked. What should I do?
    • We are now investigating this issue, which appears to occur in certain versions of Adobe Reader.
      Sometimes selecting the Print As Image option solves this problem when printing from Adobe Reader.
      Or, if that does not work, please use the JPEG View option.

  4. Why are there items on which the "Print" or "JPEG View" buttons do not appear on the Viewer?
    • Because some materials are made available on the Internet on the condition that they will not be printed or reproduced by any other means.

  5. Why is there a limit to the number of frames that can be printed at one time?
    • The number is limited due to the technical capability of the system.You can print up to 50 frames at once via the Internet or in the partner libraries, but the available number of frames at one time is limited to 20 frames in the facilities of the NDL due to the time it takes to provide the printed materials.

  6. I wish to save PDF files, but they open by default. Can you improve this function?
    • PDF files used in the NDL Digital Collections are output as Content type:application/pdf, and are opened or saved in accordance with your browser settings, which could vary depending on your browser and operating system.
      If you wish to save PDF files without viewing them, try using the following setting for Firefox or Google Chrome.
      • In Firefox
        Go to Tools > Add-ons > Plugins in Firefox, and disable Adobe Acrobat.
        Then go to Options > Programs, and change the Adobe Acrobat Documents setting to Save Files.
      • In Chrome
        Go to Settings > Advanced settings > Content settings > Disable individual plug-ins, and disable Chrome PDF Viewer and Adobe Acrobat.

  7. It takes time to create PDF files.
    • The time to create the PDF file depends on the numbers of frames and the quality of the images. If it takes too much time, please reduce the number of frames and print small numbers of frames at one time.

<About printing the materials not available via the Internet>
  1. I want to get a copy of a material not available via the Internet. What should I do?
    • You can make a request for copying to the NDL and receive it by courier or postal mail.
      For details, please refer to the following information. *Some materials are unavailable for photoduplication services. (ex: materials included in the Historical Recordings Collection, some doctoral dissertations and online publications)
      **The NDL provides photoduplication services in accordance with the "Copyright Law" and "The National Diet Library Rules Concerning the Use of Library Materials."

  2. Rather than by mail, I would like copied material sent to me via email as a PDF. Or can you send it to me via fax?
    • In accordance with copyright laws (public transmission rights, rights to make items electronically transmissible), the Library must obtain permission from the copyright holder in order to send copyrighted materials either in electronic PDF form or by FAX or email.
      Please be aware that the Library does not seek permission from copyright owners on behalf of users, and does not collect copyright royalties to provide its copying service.

【Other Questions】

  1. Who should I notify if I find mistakes concerning bibliographic information, the table of contents, etc.?
    • Please send the information of the material and the error (title of the material, URL, frame number, etc.) from following Form.
      • inquiry Form
        *please select the radio button "About NDL Digital Collections"
      When the original material has an error, the digital data will sustain the original text from the point of view of respecting the original text. Please check the text in the image before sending the inquiry if possible.

  2. Who should I notify if I find an unclear image or if the material is missing some pages?
    • Please send the information of the material and the error (title of the material, URL, frame number, etc.) from following Form.
      • inquiry Form
        *please select the radio button "About NDL Digital Collections"
      Please note in some cases, the printing of the original material may be indistinct, or there may be misbound pages or missing pages in the original material. If the original material has been badly damaged or is in a unique configuration, we may not be able to photograph the material again. We appreciate your understanding in advance.

  3. Why are some materials available via the Internet, while others are not, although written by the same author?
    • The NDL has been consecutively checking the copyright of digitized materials published before 1945. Materials of which the copyright issues have been cleared for all the text, illustrations, the calligraphy of the title lettering, etc. are provided via the Internet. Thus, according to the degree of progress of the confirmation and processing procedures for all the copyright holders, some materials may be available via the Internet, while others are not. In addition, materials which were only recently digitized may not have gone through the confirmation procedures. These materials are not provided via the Internet.

  4. What do the terms 保護期間満了, 許諾, and 裁定mean in the Access Restrictions field of materials that are available online?
    • These terms indicate the reason the materials are available online.

    • 保護期間満了 (Protection Period Expired)
      This term indicates that we have confirmed that copyright protection for the document has expired. This term is also used for all materials that have no copyright protection. For example, laws as well as announcements, directives, and notifications issued by the national government, municipal governments, or independent administrative agencies. Also, collections of data such as telephone directories, which are not subject to copyright protection.
    • 許諾 (Permission)
      This term indicates that the copyright holder has agreed to permit the material to be made available online.
    • 裁定 (Adjudication)
      This term indicates that the Commissioner for Cultural Affairs has determined the material may be made available online even though the copyright status is unclear or the copyright holders’ contact information is unknown. (so-called orphan works).

    • We make every effort to contact the copyright holders of materials that are included in the NDL Digital Collections. If you have information on how to contact a copyright holder, please contact us at the following e-mail address.
      E-mail: ml-chosakuken(at)ndl.go.jp
      Note: Please replace the (at) with an @.

  5. I wish to reproduce an image from the "National Diet Library Digital Collections" whose "Access Restriction" of the Bibliographic Information Area does not show "インターネット公開". What should I do?
    • If the "Access Restriction" shows "国立国会図書館/図書館送信参加館内公開 (Available only at the NDL and partner libraries)" or "館内公開 (Available only at the NDL)", we do not provide digital images. Please use the Photoduplication Service.

  6. Is there a list of materials provided via the NDL Digital Collections?
  7. Is there a way to automatically search and obtain bibliographic data from the system?
    • The NDL Digital Collections has implemented the protocols SRU, SRW, OpenSearch, OpenURL, Z39.50, and OAI-PMH. Base URLs for each protocol are listed at the Application Programming Interface (API) (in Japanese) of the NDL Search.

  8. What kind of materials are preferentially digitized?
    • The NDL develops annual digitization plans, based on the assessment of deterioration levels, usage frequency, and the estimated cost for copyright clearance.

Contact Us

Contact information regarding the National Diet Library Digital Collections is available following page.