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 2025)
Buildings and storages
| Tokyo Main Library | Kansai-kan of the NDL | International Library of Children's Literature(ILCL) | |
|---|---|---|---|
| Total site area | 29,822m2 | 82,665m2 | 7,733m2 |
| Total floor space | 147,853m2 | 84,339m2 | 12,761m2 |
| Total area of reading rooms | 18,983m2 | 4,265m2 | 2,054m2 |
| Total storage space | 77,829m2 | 39,026m2 | 3,114m2 |
| Storage capacity | 12,000,000 volumes | 11,000,000 volumes | 1,050,000 volumes |
Collections (domestic and foreign publications)
| Total acquisitions | Annual acquisition | ||
|---|---|---|---|
| Total | 48,697,924 items | Total | 595,823 items |
| Books | 12,631,196 items | Books | 165,561 items |
| Periodicals | 14,198,381 items | Periodicals | 234,057 items |
| Newspapers | 7,364,935 items | Newspapers | 155,942 items |
| Microforms | 9,147,339 items | Microforms | 3,681 items |
| Video recordings | 308,875 items | Video recordings | 6,980 items |
| Audio recordings | 841,010 items | Audio recordings | 7,978 items |
| Machine-readable materials (CD-ROMs, etc.) | 201,774 items | Machine-readable materials (CD-ROMs, etc.) | 5,581 items |
| Maps | 608,203 items | Maps | 3,465 items |
| Musical scores | 34,128 items | Musical scores | 749 items |
| Doctoral dissertations | 603,551 items | Doctoral dissertations | 541 items |
| Manuscripts | 486,888 items | Manuscripts | 9,913 items |
| Braille and large print | 53,876 items | Braille and large print | 1,168 items |
Services
| Services for the public | |
|---|---|
| On-site users | 715,311 people |
| Tokyo Main Library | 472,921 people (1,707 per day on average) |
| Kansai-kan of the NDL | 72,200 people (263 per day on average) |
| ILCL | 170,190 people (597 per day on average) |
| Reading services | 1,665,876 items |
| Photoduplication services | 857,155 cases |
| Remote photoduplication services | 219,236 cases |
| Reference services | 606,757 cases |
| Digital Library services | |
|---|---|
| Digitized materials available on the NDL Digital Collections Total | 6,749,342 items |
| Number of materials available via the internet | 2,092,441 items |
| Available with Digitized Contents Transmission Service | 2,339,551 items |
| Available only at the NDL | 2,317,350 items |
| Materials digitized by the NDL (Approximate) | 4,910,000 items |
| Number of materials available via the internet | 680,000 items |
| Available with Digitized Contents Transmission Service | 2,330,000 items |
| Available only at the NDL | 1,910,000 items |
| Online publications collected by the NDL (Approximate) Total | 1,660,000 items |
| Number of materials available via the internet | 1,400,000 items |
| Available only at the NDL | 260,000 items |
| Number of captures (Web Archiving Project) | 296,669 items |
| Services for the Diet | |
|---|---|
| Research on request | 26,510 cases |
| Research on national policy issues | 321 cases |
| Services for the executive and judicial branches of the government | |
|---|---|
| Loan services | 2,291 items |
| Research and reference | 225 cases |
| Services for Libraries | |
|---|---|
| Loan services | 8,504 items |
| Reference services | 2,276 cases |
| Libraries participating in the Collaborative Reference Database | 956 libraries |