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Statistics

Statistics by fiscal year are available at "Annual Report of the National Diet Library".

Please see "Finance" page for budget information.

The NDL in figures (Key statistics of FY 2022)

Buildings and storages (Approximate)

  Total site area Total floor space Total area of reading rooms Total storage space Storage capacity
Tokyo Main Library 30,000m2 148,000m2 19,000m2 78,000m2 12,000,000 volumes
Kansai-kan of the NDL 83,000m2 84,000m2 4,300m2 39,000m2 11,000,000 volumes
ILCL 7,700m2 13,000m2 2,100m2 3,100m2 1,050,000 volumes

Collections (domestic and foreign publications)

Total acquisitions Annual acquisition
Total 46,855,998 items Total 871,292 items
Books 12,113,354 items Books 186,646 items
Periodicals 13,456,981 items Periodicals 260,288 items
Newspapers 6,904,107 items Newspapers 186,299 items
Microforms 9,167,880 items Microforms 163,479 items
Video recordings 281,359 items Video recordings 28,614 items
Audio recordings 813,300 items Audio recordings 11,458 items
Machine-readable materials
(CD-ROMs, etc.)
182,830 items Machine-readable materials
(CD-ROMs, etc.)
9,461 items
Maps 596,759 items Maps 3,783 items
Musical scores 31,840 items Musical scores 3,143 items
Doctoral dissertations 601,664 items Doctoral dissertations 1,532 items
Manuscripts 438,370 items Manuscripts 14,385 items
Braille and large print 50,220 items Braille and large print 1,838 items

Services

Services for the public
Reference services 500,513 cases
Reading services 1,652,421 items
Photoduplication services 942,166 cases
Remote photoduplication services 277,981 cases
On-site users 509,023 people
Tokyo Main Library 334,626 people
(1,199 per day on average)
Kansai-kan of the NDL 67,188 people
(241 per day on average)
ILCL 107,209 people
(377 per day on average)
Digital Library services
Visitors to our website 37,941,442 cases
Viewers of digitized materials on the NDL Digital Collections 66,871,857 cases
Viewers of contents on the Web Archiving Project 38,797,455 cases
Digitized materials available on the NDL Digital Collections
Number of digitized materials
5,028,894 items
Number of materials available via the internet 1,838,041 items
Available with Digitized Contents Transmission Service 1,851,430 items
Available only at the NDL 1,339,423 items
Materials digitized by the NDL (Approximate) 3,430,000 items
Number of materials available via the internet 580,000 items
Available with Digitized Contents Transmission Service 1,840,000 items
Available only at the NDL 1,010,000 items
Online publications collected by the NDL (Approximate) 1,480,000 items
Number of materials available via the internet 1,250,000 items
Available only at the NDL 220,000 items
Number of captures (Web Archiving Project) 238,065 items
Services for the Diet
Research on request 33,465 cases
Research on national policy issues 319 cases
Services for the executive and judicial branches of the government
Research and reference 426 cases
Loan services 4,028 items
Services for Libraries
Reference services 4,142 cases
Loan services 14,024 items
Libraries participating in the Collaborative Reference Database 907 libraries

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