Preceding this reorganization, the Research and Legislative Reference Bureau had been reorganized on April 1, 2001, in order to deal with the rise of demand from the Diet to improve legislative research services. For details, please see the National Diet Library Monthly Bulletin, No. 482, May 2001 (text in Japanese). 

As a result of this reorganization, the NDL now consists of the Main Library (Tokyo Main Library with one bureau, five departments and the Detached Library in the Diet, and the Kansai-kan with one division and two departments) and two branch libraries (the ILCL and the Toyo Bunko) and 27 Branch Libraries located in the executive and judicial agencies of the government. For the new Organization Chart of the National Diet Library, please see here. 
 

1. Tokyo Main Library 

From materials to functions
Previous, some departments had been organized according to their collections (Books, Serials, and Special Materials Department). This time the Library was reorganized according to its function (acquisition, cataloging, storage, and public services) to improve its services for the Diet, executive and judicial agencies, and the general public. 

(1) A Bibliography Department has been established to integrate the cataloging services that had formerly provided by several departments. 

(2) A Public Services Department has been established to manage basic materials, books and serials, and provide comprehensive public services. 

(3) A Reference and Special Collections Department has been established to provide appropriate reference service that meets today's needs, 

Integration and enhancement of planning and coordinating function
Administrative aspects of library cooperation such as planning, coordination and negotiation that had been undertaken by the Library Cooperation Department, were integrated into the Administrative Department to enhance library cooperation functions. The Planning and Cooperation Division is in charge of these affairs. The Branch Libraries Division that supports the Branch Libraries placed in the executive and judicial agencies of the government was also transferred to the Administrative Department. 

Coping with the Information Technology Society
To undertake the construction of the Information Technology Society that is an important national policy, the Electronic Library Development Office, Planning Division, Administrative Department, was reorganized as the Digital Information Planning Office, Planning and Cooperation Division, Administrative Department. The Office coordinates digital information service projects that are being undertaken by several divisions such as the Kansai-kan and cooperates with both domestic and international advanced institutes in this field. 

Enhancement of acquisition function
To deal with the wider demand for library materials and the diversification of information media, the cataloging function was separated from the Acquisitions Department. The acquisition and management function of library materials was effectively reorganized and the new Acquisitions Department established. It consists of the Acquisition Administration Division, the Domestic Materials Acquisition Division, the Foreign Materials Acquisition Division and the Preservation Division. 

Integration and enhancement of bibliographic service
The newly established Bibliography Department integrates bibliographic service and provides it to the Tokyo Main Library, the Kansai-kan, and the ILCL. It consists of the Bibliographic Control Division, the Domestic Monographs Cataloging Division, the Foreign Monographs and Non-book Materials Cataloging Division, and the Serials Cataloging Division. In the Serials Cataloging Division, the Japanese Periodicals Index is also produced. 

Comprehensive promotion of public services
The newly established Public Services Department coordinates public services operated in the Tokyo Main Library, the Kansai-kan and the ILCL and aims at providing total and effective public services. It consists of the Reader Service Planning Division, the Photoduplication Service Division, the Book Service Division, the Periodicals Service Division, and the Electronic Resources Division. This last provides not only audiovisual materials but also electronic journals and offline electronic materials in the library. 

Enhancement of reference service
The special materials rooms of the Reference and Special Collections Department were reorganized to clarify their themes and aim at providing not only the Library's collections but also a wide range of information on those subjects. The Reference and Special Collections Department consists of the Reference Service Planning Division, the Business, Science and Technology Division, the Humanities Division (including library science and maps collection), the Modern Japanese Political Documents Division, the Rare Books and Old Materials Division, and the Newspapers Division. 

In the Research and Legislative Reference Bureau, the Parliamentary Documents and Official Publications Division was newly established and provides statutes, parliamentary documents, government documents, official publications and reference books on law and politics to the Diet members and the general public. 
 

2. Kansai-kan

Establishment of the Kansai-kan
The newly established Kansai-kan of the National Diet Library consists of the Administrative Division, the Collections Department and the Projects Department. 

(1) Administrative Division: In charge of management, personnel, accounts and the facilities of the Kansai-kan. 

(2) Collections Department: In charge of acquisition, cataloging and public services. It consists of the Public Services Division (including remote services), Asian Resources Division, and Acquisitions and Cataloging Division 

(3) Projects Department: In charge of library cooperation and the digital library project in the Kansai-kan. It consists of the Library Support Division (producing the union catalog, providing services for the visually and physically handicapped, conducting library science research and training for librarians) and the Digital Library Division (digitization and services via the Internet, and acquisition of online electronic materials). The Digital Library Division also conducts research and development of the digital library. 
 

3. The International Library of Children's Literature