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 2023)
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 |
| International Library of Children's Literature(ILCL) | 7,700m2 | 13,000m2 | 2,100m2 | 3,100m2 | 1,050,000 volumes |
Collections (domestic and foreign publications)
| Total acquisitions | Annual acquisition | ||
|---|---|---|---|
| Total | 47,531,625 items | Total | 694,619 items |
| Books | 12,302,392 items | Books | 196,457 items |
| Periodicals | 13,718,823 items | Periodicals | 261,996 items |
| Newspapers | 7,059,131 items | Newspapers | 165,753 items |
| Microforms | 9,170,324 items | Microforms | 3,124 items |
| Video recordings | 295,098 items | Video recordings | 13,741 items |
| Audio recordings | 824,320 items | Audio recordings | 11,024 items |
| Machine-readable materials (CD-ROMs, etc.) |
189,956 items | Machine-readable materials (CD-ROMs, etc.) |
7,129 items |
| Maps | 600,786 items | Maps | 4,027 items |
| Musical scores | 32,591 items | Musical scores | 751 items |
| Doctoral dissertations | 602,462 items | Doctoral dissertations | 798 items |
| Manuscripts | 466,869 items | Manuscripts | 28,500 items |
| Braille and large print | 51,337 items | Braille and large print | 1,117 items |
Services
| Services for the public | |
|---|---|
| Reference services | 548,207 cases |
| Reading services | 1,777,120 items |
| Photoduplication services | 952,547 cases |
| Remote photoduplication services | 255,806 cases |
| On-site users | 610,422 people |
| Tokyo Main Library | 413,407 people (1,476 per day on average) |
| Kansai-kan of the NDL | 66,576 people (239 per day on average) |
| ILCL | 130,439 people (456 per day on average) |
| Digital Library services | |
|---|---|
| Visitors to our website | 46,148,607 cases |
| Viewers of digitized materials on the NDL Digital Collections | 3,814,483 cases |
| Viewers of contents on the Web Archiving Project | 43,294,113 cases |
| Digitized materials available on the NDL Digital Collections Total | 5,578,623 items |
| Number of materials available via the internet | 1,919,280 items |
| Available with Digitized Contents Transmission Service | 1,803,834 items |
| Available only at the NDL | 1,855,509 items |
| Materials digitized by the NDL (Approximate) | 3,900,000 items |
| Number of materials available via the internet | 620,000 items |
| Available with Digitized Contents Transmission Service | 1,790,000 items |
| Available only at the NDL | 1,490,000 items |
| Online publications collected by the NDL (Approximate) Total | 1,530,000 items |
| Number of materials available via the internet | 1,290,000 items |
| Available only at the NDL | 240,000 items |
| Number of captures (Web Archiving Project) | 256,771 items |
| Services for the Diet | |
|---|---|
| Research on request | 36,233 cases |
| Research on national policy issues | 307 cases |
| Services for the executive and judicial branches of the government | |
|---|---|
| Research and reference | 401 cases |
| Loan services | 3,344 items |
| Services for Libraries | |
|---|---|
| Reference services | 3,527 cases |
| Loan services | 12,063 items |
| Libraries participating in the Collaborative Reference Database | 925 libraries |