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 2017)

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 14,8000m2 19,000m2 78,000m2 12,000,000 volumes
Kansai-kan of the NDL 83,000m2 59,000m2 4,300m2 24,000m2 6,000,000 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 43,426,450 items 801,747 items
Books 11,154,403 items 201,873 items
Periodicals 12,050,850 items 319,808 items
Newspapers 6,006,088 items 198,830 items
Microforms 9,125,325 items 7,929 items
Video recordings 354,009 items 24,699 items
Audio recordings 746,610 items 20,669 items
Machine-readable materials
(CDs, DVDs, etc.)
150,881 items 7,049 items
Maps 573,408 items 6,331 items
Musical scores 19,497 items 1,167 items
Doctoral dissertations 594,809 items 713 items
Manuscripts 396,052 items 6,562 items
Braille and large print 42,011 items 4,592 items

Services

Services for the public
Reference services 884,830 cases
Reading services 2,313,096 items
Photoduplication services 1,329,172 cases
Remote photoduplication services 262,066 cases
On-site users 791,710 people
Tokyo Main Library 576,933 people
(2,068 per day on average)
Kansai-kan of the NDL 73,576 people
(264 per day on average)
ILCL 141,201 people
(495 per day on average)
Digital Library services
Visitors to our website 20,894,477 cases
Viewers of digitized materials on the NDL Digital Collections 56,137,662 cases
Digitized materials available on the NDL Digital Collections
Number of digitized materials
3,778,853 items
Number of materials available via the internet 1,485,995 items
Available at partner libraries 1,512,509 items
Available only at the NDL 780,349 items
Materials digitized by the NDL (Approximate) 2,660,000 items
Number of materials available via the internet 530,000 items
Available at partner libraries 1,500,000 items
Available only at the NDL 630,000 items
Services for the Diet
Research on request 36,224 cases
Anticipatory research 328 cases
Services for the executive and judicial branches of the government
Research and reference 779 cases
Loan services 7,317 items
Services for Libraries
Reference services 4,872 cases
Loan services 15,350 items
Libraries participating in the Collaborative Reference Database 769 libraries

To the head of this page