2024-9-19 "Japanese Periodicals Index", the number of articles exceeded 15 million

The National Diet Library provides the "Japanese Periodicals Index" as a search means for Japanese periodical articles from 1949. On September 13, the number of records exceeded 15 million.

The "Japanese Periodicals Index" indexes about 11,000 periodicals (so far accumulated about 26,000 periodicals). Its scopes in the field of periodicals and the volume of its records make it one of the leading databases of periodical articles in Japan.

Not only in the services of the National Diet Library (ex. the NDL Search), this database is widely used in, for example, the CiNii Research of the National Institute of Informatics and the WorldCat of the OCLC, Inc.