From Wikipedia the free encyclopedia

ProducerNational Institute of Informatics (Japan)
HistoryApril 2005–present
LanguagesJapanese, English
CostFree; Subscription for full-text
Record depthIndex, abstract & full-text
Format coverageJournal articles and books
Temporal coverage1906–present
Geospatial coverageJapan
No. of records22 million

CiNii (/ˈsn/)[1] is a bibliographic database service for material in Japanese academic libraries, especially focusing on Japanese works and English works published in Japan. An early trial version of the database was a component of its predecessor called GeNii, [2] available online at least since June 2002.[3] A complete version of CiNii has been available since April 2005.[4] The service searches from within the databases maintained by the NII itself (Citation Database for Japanese Publications, CJP), as well as the databases provided by the Japan Science and Technology Agency (J-STAGE), the National Diet Library of Japan, institutional repositories, and other organizations.[5]

As of March 2020, the database contains more than 22 million articles from more than 3,600 publications.[5] A typical month (in 2012) saw more than 30 million accesses from 2.2 million unique visitors,[6] and is the largest and most comprehensive database of its kind in Japan. Although the database is multidisciplinary, the largest portion of the queries it receives is in the humanities and social sciences field, perhaps because CiNii is the only database that covers Japanese scholarly works in this field (as opposed to the natural, formal, and medical sciences which benefit from other databases).[7]

Database identifiers[edit]

The database assigns a unique identifier, NII Article ID (NAID), to each of its journal article entries.[6] A different identifier, NII Citation ID (NCID or 書誌ID) aka NACSIS-CAT Record ID, is used for books.

NCID examples[edit]

  • NCID BA04004867 for the 1951 Little, Brown edition and of The Catcher in the Rye
  • NCID BB17611495 for the 2010 Penguin edition of The Catcher in the Rye
  • NCID BA36680090 for a 1952 edition of Kiken na nenrei (危険な年齢), NCID BN01880084 for a 1964 edition of Rai-mugi batake de tsukamaete (ライ麦畑でつかまえて), and NCID BA61718322 for a 2003 edition of Kyatchā in za rai (キャッチャー・イン・ザ・ライ), all three being Japanese translations of The Catcher in the Rye
  • NCID BB13715590 for a 1997 edition of Mai tian li de shou wang zhe (麦田里的守望者), a Chinese translation of The Catcher in the Rye.

Identifiers are also assigned to authors of books, and of journal articles, in two separate series (so an author may have a different identifier value in each). For example, Shinsaku Kimoto is DA00432173 for books and 9000002393144 for journal articles.

See also[edit]


  1. ^ "About CiNii". CiNii. Retrieved 2014-02-23.
  2. ^ Negishi, Masamitsu; Sun, Yuan; Shigi, Kunihiro (2004). "Citation Database for Japanese Papers: A new bibliometric tool for Japanese academic society". Scientometrics. 60 (3): 348. doi:10.1023/B:SCIE.0000034378.38698.b2. Retrieved 2023-08-25.
  3. ^ "About CiNii" (in Japanese). National Institute of Informatics. June 2002. Archived from the original on 2002-06-10. Retrieved 2023-08-25.
  4. ^ 大向一輝 (Ohmukai, Ikki) (2009). "学術情報プラットフォームとしてのCiNii". Current Awareness (in Japanese) (301). CA1691.
  5. ^ a b "CiNii Articles - CiNii Articles Incorporated Databases". CiNii. Retrieved 2023-08-25.
  6. ^ a b 大向一輝 (Ohmukai, Ikki) (2012). "System design and data modeling of CiNii articles". The Journal of Information Science and Technology Association. 62 (11): 473–477.
  7. ^ 日詰梨恵 (Hizume, Rie); 逸村裕 (Itsumura, Hiroshi) (2010). "CiNii 収録率から見たわが国の学術情報電子化の現状:人文学4領域を対象に". 中部図書館情報学会誌. 50: 19–35. hdl:2241/105270.

External links[edit]