May 20, 2022

All Bibliographic Data From the National Library of Japan (National Diet Library) is Now Freely Available for Commercial or Non-Commercial Use

From the National Library of Japan:

The bibliographic data of the National Diet Library (not including body text) became available for anyone at no charge, whether the purpose of use is commercial or non-commercial, from April 1, 2019.

The bibliographic data includes authority data (data of authors and keywords which are arranged for use as clues when searching materials), data of periodicals index, and information of table of contents, as well as bibliographic data (titles, authors, publishers, and date of publication of materials) made by the National Diet Library.

In addition, data provided by the National Diet Library, which the National Diet Library obtains by links to external organizations, is also available without application, as long as the National Diet Library is permitted to provide the data in accordance with the contract with the organization.

Services which currently provide bibliographic data are as follows. Please check the introduction and help pages of each service when using that data. Please take this chance to try to use the bibliographic data of the National Diet Library in various situations.

About Gary Price

Gary Price ( is a librarian, writer, consultant, and frequent conference speaker based in the Washington D.C. metro area. Before launching INFOdocket, Price and Shirl Kennedy were the founders and senior editors at ResourceShelf and DocuTicker for 10 years. From 2006-2009 he was Director of Online Information Services at, and is currently a contributing editor at Search Engine Land.