Home > About Us > Statistics

Statistics

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

Back numbers of "Annual Report of the National Diet Library" are available at "National Diet Library Digital Collections." Please see "Finance" page for budget information.

The NDL in figures (Key statistics of FY 2018)

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

* Storage capacity is calculated based on a book thickness of 3cm.

Collections (domestic and foreign publications)

  Total acquisitions Annual acquisition
Total 44,187,016 items 777,196 items
Books 11,354,294 items 201,118 items
Periodicals 12,350,578 items 300,935 items
Newspapers 6,194,453 items 201,089 items
Microforms 9,137,645 items 13,780 items
Video recordings 365,598 items 11,589 items
Audio recordings 762,661 items 16,053 items
Machine-readable materials
(CDs, DVDs, etc.)
157,533 items 6,654 items
Maps 580,608 items 7,208 items
Musical scores 20,285 items 788 items
Doctoral dissertations 596,153 items 1,344 items
Manuscripts 409,666 items 13,614 items
Braille and large print 43,525 items 1,514 items

Services

Services for the public
Reference services 863,691 cases
Reading services 2,185,497 items
Photoduplication services 1,320,116 cases
Remote photoduplication services 285,409 cases
On-site users 791,370 people
Tokyo Main Library 575,756 people
(2,071 per day on average)
Kansai-kan of the NDL 72,373 people
(260 per day on average)
ILCL 143,241 people
(503 per day on average)
Digital Library services
Visitors to our website 18,275,403 cases
Viewers of digitized materials on the NDL Digital Collections 66,234,507 cases
Digitized materials available on the NDL Digital Collections
Number of digitized materials
3,929,535 items
Number of materials available via the internet 1,574,119 items
Available at partner libraries 1,510,004 items
Available only at the NDL 845,412 items
Materials digitized by the NDL (Approximate) 2,690,000 items
Number of materials available via the internet 540,000 items
Available at partner libraries 1,500,000 items
Available only at the NDL 650,000 items
Services for the Diet
Research on request 37,897 cases
Research on national policy issues 323 cases
Services for the executive and judicial branches of the government
Research and reference 721 cases
Loan services 6,046 items
Services for Libraries
Reference services 4,416 cases
Loan services 14,875 items
Libraries participating in the Collaborative Reference Database 805 libraries

To the head of this page