About CiNii - CiNii Articles Databases Incorporated

Databases Incorporated

CiNii Articles incorporates the following databases, enabling users to search for articles and Authors from a large volume of data.
The work of unifying different databases is ongoing, steadily making CiNii easier to use.
As of April 2014, the number of articles which can be searched is about 16 million. (Excelude Citation information)

(Providing Institution)
Code Content Coverage
Electronic Library Service Academic Society Journals
(National Institute of Informatics)

◎Full text documents available
◎Abstracts incorporated when available

This database provides access to papers published in Japanese academic society journals, with all pages stored as PDF files.

※Parts of this database (the Image Database of Preprint, the Electronic Library Original Document Database, and Clinical Case Reports) are compiled with the support of Grants-in-Aid for Publication of Scientific Research Results from the Japan Society for the Promotion of Science.

Period available is different according to the journal. (It depends on the period approved for computerization.)

Approx. 3.65 million items
List of journals available
Electronic Library Service Research Bulletins
(joint input from each university)

◎Partial text documents/external links available
◎Partial abstracts available

This database compiles article information appearing in research bulletins published by Japanese universities, etc.

Period available is different according to the journal.

Approx. 1.1 million items
List of journals incorporated
Citation Database for Japanese Publications
(National Institute of Informatics)

CJP ref
*See NOTE 1

◎References incorporated when available
This database is designed to show the relationship between academic papers and the papers they reference, covering papers of Japanese academic society journals in the field of natural sciences.

Period available: 1992 onwards (It differs by journal.)

Bibliography: Approx. 2 million items
References: Approx. 22.90 million items
List of journals incorporated
NDLJPI Japanese Periodicals Index
(National Diet Library)

◎Bibliographic information only
With academic journals, university bulletins and specialized magazines at the core of the publications collected by the National Diet Library, the Japanese Periodicals Index is the nation’s largest index compiling data on every field from society and culture to science and technology to medicine and pharmacy.

Approx. 11.30 million items
List of journals incorporated(National Diet Libray website)
Institutional Repository
(Universities, etc.)

◎Full text documents available
◎Partial abstracts available
Institutional Repository is archive system installed for research institutions, such as universities to collect, accumulate, and store their intellectual products in an electronic form and disclose them for free.
Although integrated search service JAIRO of Japanese institutional repositories is offered by National Institute of Informatics, searching for articles is enabled also by CiNii.

Approx. 1.02 million items
(Japan Science and Technology Agency)


◎Full text documents available
◎Abstracts available
J-STAGE, a database which offers e-journals of Japanese academic societies.
Journal@rchive, a database which offers the archive of major academic journals in Japan.
Only those permitted by Academic Society can be searched also with CiNii. Academic Society which wants to be posted in CiNii needs to inform the secretariat of the Japan Science and Technology Agency.

Approx. 0.74 million items
JSAP Online Journals
(The Japan Society of Applied Physics)

◎Full text documents available
◎Abstracts available
E-journals published by The Japan Society of Applied Physics. "Japanese Journal of Applied Physics" and "Applied Physics Express"

Approx. 0.1 million items
Nikkei BP Magazine Archive
(Nikkei BP)
Nikkei BP

◎Full text documents available
◎Abstracts available
Search service for journals published by Nikkei BP.
Link buttons to Nikkei BP’s service and abstracts are added by them for existing data from other databases.


As of April, 2014

*Note1: About references in the Citation Database for Japanese Papers (CJP ref)
CiNii Articles counts each referenced datum from the Citation Database for Japanese Papers as a single record.
In most cases, when the "Databases: " field has only "CJP ref", only simplified information (e.g. bibliography in a references list) is available.
Please note that entries are presented as they originally appeared, and NII cannot correct any errors in the data.