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 |