Publications issued in Japan, statutes and parliamentary documents, publications on Japan, reference material, material on science and technology, publications of international organizations and foreign governments, children's literature and related material, Asian works
The purpose of the library is to assist members of the Diet of Japan (国会, Kokkai). The library is similar in purpose and scope to the U.S. Library of Congress.
The National Diet Library has two main facilities. One is in Tokyo and the other is in Kyoto. There are also several branch libraries in Japan.