Home > About Us > Statistics

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 2020)

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 45,609,602 items 710,655 items
Books 11,739,412 items 192,928 items
Periodicals 12,921,695 items 283,972 items
Newspapers 6,560,825 items 190,208 items
Microforms 9,148,357 items 6,663 items
Video recordings 386,298 items 6,939 items
Audio recordings 788,269 items 10,134 items
Machine-readable materials
(CDs, DVDs, etc.)
167,590 items 6,597 items
Maps 590,171 items 4,389 items
Musical scores 26,612 items 3,117 items
Doctoral dissertations 598,195 items 901 items
Manuscripts 419,810 items 3,555 items
Braille and large print 45,588 items 1,043 items

Services

Services for the public
Reference services 306,873 cases
Reading services 985,939 items
Photoduplication services 681,363 cases
Remote photoduplication services 311,539 cases
On-site users 263,234 people
Tokyo Main Library 155,629 people
(695 per day on average)
Kansai-kan of the NDL 59,444 people
(249 per day on average)
ILCL 48,161 people
(210 per day on average)
Digital Library services
Visitors to our website 31,483,468 cases
Viewers of digitized materials on the NDL Digital Collections 118,477,479 cases
Viewers of contents on the Web Archiving Project 57,667,525 cases
Digitized materials available on the NDL Digital Collections
Number of digitized materials
4,190,051 items
Number of materials available via the internet 1,698,967 items
Available at partner libraries 1,529,162 items
Available only at the NDL 961,922 items
Materials digitized by the NDL (Approximate) 2,760,000 items
Number of materials available via the internet 550,000 items
Available at partner libraries 1,520,000 items
Available only at the NDL 690,000 items
Online publications collected by the NDL 1,330,000 items
Number of materials available via the internet 1,140,000 items
Available only at the NDL 190,000 items
Number of captures (Web Archiving Project) 197,446 items
Services for the Diet
Research on request 35,259 cases
Research on national policy issues 329 cases
Services for the executive and judicial branches of the government
Research and reference 588 cases
Loan services 4,355 items
Services for Libraries
Reference services 4,073 cases
Loan services 12,863 items
Libraries participating in the Collaborative Reference Database 855 libraries

To the head of this page