CiNii - About CiNii

About CiNii

CiNii(Academic information search service, pronounced like "sigh-knee") is a database service which can be searched with academic information of articles, Books, Journals & Dissertations.
It is available free of charge for anyone.

"CiNii Research" enables you to search not only information on academic articles but also a lot of information related to research activities such as research data and project information..
About CiNii Research>>

"CiNii Articles" was integrated into CiNii Research on April 18, 2022.

"CiNii Books" enables you to search information of books and journals held by university libraries in Japan.
About CiNii Books>>

"CiNii Dissertations" enables you to search information on dissertations written for doctoral degrees in Japan conferred by Japanese Universities and the National Institute for Academic Degrees and University Evaluation.
About CiNii Dissertations>>

Before using CiNii

Please read carefully the Academic Content Service Usage Regulations and CiNii Articles Service Usage Detailed Regulations before using CiNii. By using CiNii, you agree to both regulations.

Terms of use>>


You can download PDF Brochures of CiNii.

CiNii_pamphlet CiNii_Brochures(2023/10)[PDF: 1.6 MB]

System Requirements

Recommdended web browsers

Operating environments are as follows (as of November 2021):

  • Mozilla Firefox
  • Google Chrome
  • Microsoft Edge
  • Safari

* Please use the latest versions of each browser.


CiNii uses JavaScript. Please enable JavaScript to use CiNii, in the settings of the browser you are using. If JavaScript is not enabled, some pages may not function or be displayed properly.

Cookie Configuration

CiNii uses cookies. Please allow your browser to accept cookies, in the settings of the browser you are using. If cookies are not enabled, some functions may not be used. Details of cookie configuration, please see as follows:


CiNii uses Pop-ups. Please allow your browser to accept Pop-ups, in the settings of the browser you are using. If Pop-ups are not enabled, some functions may not be used.

Plug-in Requirements

Full text documents are available for reading from CiNii Research, CiNii Articles and CiNii Dissertations in PDF format. Please obtain the latest version of Adobe Reader (6.0 or later is recommended) in advance.

If you get an error viewing a PDF, try uninstalling your Adobe Acrobat Reader and reinstalling the latest version. It has been reported that having copies of both old and new versions of Adobe Acrobat Reader on the same computer can causes an error, even if you have installed the latest version.
Download Adobe Reader>>

If you get error messages frequently, please refer to the following FAQ page.
Frequently-Asked Questions "Questions about using content">>