CiNii (National The National Institute of Informatics (NII) is the largest academic database in Japan, operated by the National Institute of Information, and contains journal articles and university journal articles from various academic institutions and organizations in Japan. The indexed papers are more extensive and contain a considerable amount of full-text literature, which shows how papers are cited and quoted.

CiNii Articles: Retrieval Japanese Articles - You can retrieve information on academic articles published in academic journals of the Association, university research journals, the National Diet Library's magazine chronicles, and indexing databases. The database contains about 15 million academic papers, of which about 3.7 million are published in the journals of the Association, university journals, or the National Research Institute of Japan.

CiNii Books: Bibliographic Search for Japanese University Libraries - Access to bibliographic information on approximately 10 million titles (approximately 100 million volumes) and 1.5 million authors from 1,200 university libraries in Japan. The bibliographies include a wide range of bibliographic information, from the most recent edition to the most recent edition. These bibliographies include a wide range of publications from the latest publications to classics, overseas books, CDs, DVDs, and many other areas. By searching, readers can find out where these books are housed, and from the pages of the books and magazines, they can link directly to the OPAC system of each university library, and can instantly confirm whether they can borrow them.