National Diet Library

national library in Japan
Organization national_library Q477675
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The National Diet Library is Japan’s national library. It was founded on February 25, 1948.

The library serves as the country’s primary repository for published materials. Its establishment marked the consolidation of parliamentary and national collections under a single institution.

Key Facts

  • Member of: World Digital Library[3], Geheugen van Nederland[4], International Federation of Library Associations and Institutions[5], International Internet Preservation Consortium[6]
  • Located in the administrative territorial entity: Nagatachō[7]
  • Country: Japan[8]
  • Instance of: parliamentary library[9], library building[10]
  • Architect: Maekawa Associates, Architects & Engineers[11]
  • Main regulatory text: National Diet Library Act[12]
  • Operator: National Diet[13]
  • Headquarters location: Nagatachō[14]
  • Postal code: 100-8924[15]
  • Commons category: National Diet Library[16]
  • Has part(s): International Library of Children's Literature[17], Supreme Court Library[18], Kokuritsu Kokkai Toshokan. Shibu Ueno Toshokan[19], Kokuritsu Kokkai Toshokan Toshokan Kyoryokubu[20], Modern Japanese Political History Materials Room[21], Research and Legislative Reference Bureau, National Diet Library[22], Kansai-kan of the National Diet Library[23], Detached Library in the Diet[24]
  • Inception: February 25, 1948[25]
  • Parent organization or unit: National Diet[26]
  • Official website: https://www.ndl.go.jp/[27], https://www.ndl.go.jp/en/[28], https://www.ndl.go.jp/zh/[29], https://www.ndl.go.jp/ko/[30]
  • Topic's main category: Category:National Diet Library[31]
  • Described at URL: http://viaf.org/viaf/partnerpages/NDL.html[32]
  • Web feed URL: https://www.ndl.go.jp/jp/rss/update.xml[33]
  • Described by source: Open GLAM Survey[34]
  • Replaces: Imperial Library[35]
  • Topic has template: Template:National Diet Library[36], Template:National Diet Library Bibliographic ID[37]
  • Collection or exhibition size: 43,426,450 concrete object[38]
  • Official name: 国立国会図書館[39], National Diet Library[40]
  • Has characteristic: web accessibility[41]
  • Commons Institution page: National Diet Library[42]
  • Date of official opening: June 5, 1948[43]

Body

Identity

National Diet Library's short name is recorded as NDL[44].

Why It Matters

National Diet Library has Wikipedia articles in 28 language editions, a strong signal of global cultural recognition.[45] It is known by 48 alternative names across languages and contexts.[46]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [8] ↑ . wikidata.org.
  2. [9] ↑ . wikidata.org.
  3. [10] ↑ . wikidata.org.
  4. [11] ↑ . mlit.go.jp. mlit.go.jp. Provenance: wikidata.org.
  5. [12] ↑ . wikidata.org.
  6. [7] ↑ . wikidata.org.
  7. [13] ↑ . wikidata.org.
  8. [14] ↑ . wikidata.org.
  9. [15] ↑ . wikidata.org.
  10. [16] ↑ . wikidata.org.
  11. [3] ↑ . wdl.org. wdl.org. Provenance: wikidata.org.
  12. [4] ↑ . geheugen.delpher.nl. Retrieved . geheugen.delpher.nl. Provenance: wikidata.org.
  13. [5] ↑ . Retrieved . wikidata.org.
  14. [6] ↑ . netpreserve.org. Retrieved . netpreserve.org. Provenance: wikidata.org.
  15. [17] ↑ . ndl.go.jp. Retrieved . ndl.go.jp. Provenance: wikidata.org.
  16. [18] ↑ . ndl.go.jp. Retrieved . ndl.go.jp. Provenance: wikidata.org.
  17. [19] ↑ . wikidata.org.
  18. [20] ↑ . wikidata.org.
  19. [21] ↑ . wikidata.org.
  20. [22] ↑ . wikidata.org.
  21. [23] ↑ . wikidata.org.
  22. [24] ↑ . ndl.go.jp. Retrieved . ndl.go.jp. Provenance: wikidata.org.
  23. [25] ↑ . wikidata.org.
  24. [26] ↑ . wikidata.org.
  25. [27] ↑ . wikidata.org.
  26. [28] ↑ . wikidata.org.
  27. [29] ↑ . wikidata.org.
  28. [30] ↑ . wikidata.org.
  29. [31] ↑ . wikidata.org.
  30. [32] ↑ . viaf.org. Retrieved . viaf.org. Provenance: wikidata.org.
  31. [33] ↑ . wikidata.org.
  32. [34] ↑ . Internet Archive. Retrieved . docs.google.com. Provenance: wikidata.org.
  33. [35] ↑ . wikidata.org.
  34. [36] ↑ . wikidata.org.
  35. [37] ↑ . wikidata.org.
  36. [38] ↑ . ndl.go.jp. Retrieved . ndl.go.jp. Provenance: wikidata.org.
  37. [39] ↑ . National Tax Agency Corporate Number Publication Site. wikidata.org.
  38. [40] ↑ . National Tax Agency Corporate Number Publication Site. wikidata.org.
  39. [41] ↑ . w3.org. w3.org. Provenance: wikidata.org.
  40. [42] ↑ . wikidata.org.
  41. [43] ↑ . wikidata.org.
  42. [44] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [45] ↑ . Wikidata sitelinks. wikidata.org.
  3. [46] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). National Diet Library. Retrieved October 10, 2026, from https://4ort.xyz/entity/national-diet-library
MLA “National Diet Library.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Oct. 2026, https://4ort.xyz/entity/national-diet-library.
BibTeX @misc{4ortxyz_national-diet-library_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{National Diet Library}}, year = {2026}, url = {https://4ort.xyz/entity/national-diet-library}, note = {Accessed: 2026-10-10}}
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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 13w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    P14541 → 2LFIwQ
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
  2. 20w ago · Ihimutefu · 2026-05-22 view diff on Wikidata ↗
    Described by source → Open GLAM Survey
    Instance of → national library, parliamentary library, library building
    Main regulatory text → National Diet Library Act
    Instance of → —
    + 36 other properties edited (see Wikidata diff for full list)
    "/* wbremoveclaims-remove:1| */ Official website: https://www.ndl.go.jp/zh/"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.