National Diet Library
Japan's national library, established in 1948, serving the public, researchers, and Parliament through free physical and digital access to comprehensive collections via NDL Search, e-Depo, and digital exhibitions.
- Company typePrivate
- Founded1948
- HeadquartersTokyo, Japan
- Headcount501–1,000
- GTM typeB2C
- OfferingServices
What National Diet Library does
The National Diet Library (国立国会図書館), established in 1948, is Japan's national library operating as a government state entity under the National Diet (Parliament). It serves as both the parliamentary library and the country's primary research/reference institution, providing access to published materials in Japanese and foreign languages, government documents, and digital content. Its core user base comprises the general public, researchers and academics, Diet members and government officials requiring legislative reference services, and prefectural/municipal libraries engaged in resource-sharing programs.
The library's technical platform is anchored by NDL Search (国立国会図書館サーチ), an online catalog and discovery system at ndlonline.ndl.go.jp providing search across physical and digital holdings; e-Depo (eデポ), an online collection system for ingesting, preserving, and serving e-books and e-magazines; and Digital Exhibitions (電子展示会), a curated showcase platform presenting unique holdings with accessible explanations. Operations span two physical facilities (Tokyo Main Library and Kansai-kan in Osaka) plus a children's library service, with distribution complemented by an interlibrary cooperation network with prefectural and municipal libraries.
The National Diet Library is funded entirely through the Japanese national government budget rather than commercial revenue. All core services — physical access, online catalogs, digital archives, and e-resource lending — are provided free of charge to users. It is not a private or investor-backed entity, has no subsidiaries, and conducts no M&A activity. Marketing and public communication operate through the official website, RSS feeds, X (Twitter), and YouTube, all oriented toward public service and information dissemination rather than commercial demand generation.
National Diet Library firmographics
Firmographics- Name
- National Diet Library
- Legal name
- National Diet Library, Japan (国立国会図書館)
- Website
- https://ndl.go.jp
- Company type
- Private
- Founded year
- 1948
- Operating status
- Operating
- Headcount range
- 501–1,000 employees
- Short description
- Japan's national library, established in 1948, serving the public, researchers, and Parliament through free physical and digital access to comprehensive collections via NDL Search, e-Depo, and digital exhibitions.
- Ownership category
- akta.pro rank
National Diet Library industry classification
Industry- Product category
- National Library Services
- NAICS
- Libraries and Archives (51921), Web Search Portals, Libraries, Archives, and Other Information Services (5192)
- akta.pro primary industry
- Public Library Operations & Community Branch Management (EDAEAGAC)
- akta.pro secondary industries
- Special Libraries (Law, Medical, Corporate, Government) Operations (EDAEAGAD), eBook & Digital Reading Platforms (BPAMAJAK)
Keywords
Where National Diet Library is headquartered
LocationHeadquarters
- HQ city
- Tokyo
- HQ country
- Japan
- HQ region
- Asia
Offices2 records
Markets served
National Diet Library business model
Business model- GTM type
- B2C
- Offering type
- Services
- Cost components
- Personnel, Operations, Infrastructure, Technology or R&D, Supply Chain
Revenue model
- Government Funding: As Japan's national library, the National Diet Library is funded through the national government budget. Services are provided free of charge to the public.
Go-to-market motion1 record
Distribution channels3 records
Marketing channels4 records
National Diet Library product offering
Product offeringCore offering
The National Diet Library operates as Japan's national library, collecting, preserving, and providing public access to all materials published in Japan. Its core offerings include the NDL Search online catalog system, the e-Depo system for collecting and providing access to e-books and e-magazines, and Digital Exhibitions showcasing unique collection materials — all delivered free of charge alongside in-person access at the Tokyo Main Library and Kansai Kan.
Product overview
National Diet Library operates as Japan's national library, offering a unified platform of interconnected information services. The core offerings include NDL Search (国立国会図書館サーチ), the primary online search system for cataloging and discovering library materials; e-Depo (eデポ), the online collection system for digital materials including e-books and e-magazines; and Digital Exhibitions (電子展示会), which presents curated digital showcases of the library's unique holdings. These services are complemented by periodic events such as the Digital Archive Festival. The library maintains physical locations in Tokyo and Kansai, as well as child-focused services.
Differentiator
Problem solved
Functional benefit
Products and services
- NDL Search (国立国会図書館サーチ) Online search system that allows users to discover and search the National Diet Library's extensive collection of books, digital materials, periodicals, and online resources. Provided free of charge to the general public, researchers, Diet members, and government agencies.
- e-Depo (eデポ) Online Resource Collection System Online collection system for collecting, preserving, and providing public access to e-books and e-magazines (online materials), supplementing the library's physical collection of published works.
- Digital Exhibitions (電子展示会) Online exhibition service presenting unique materials from the National Diet Library's collection with accessible explanations, highlighting distinctive holdings for the general public and researchers.
- Physical Library Access Services In-person access to the National Diet Library's collections, reference services, and visitor facilities at the Tokyo Main Library headquarters and the Kansai Kan branch in Osaka, serving individual researchers, citizens, and institutional visitors.
Companies that use National Diet Library
Customer profileSegments3 records
Ideal customer profiles3 records
National Diet Library technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
National Diet Library partnerships and signals
Strategic signalScale indicators1 record
Recent moves5 records
Expansion highlights4 records
National Diet Library competitors and assessment
Company assessmentEmerging players
- Internet Archive: A large-scale digital library providing public access to digitized books, web archives, and audiovisual materials. It overlaps with NDL's digital-preservation and public-access roles but operates as a non-governmental nonprofit, making it a complementary rather than directly competing player.
- HathiTrust: A large-scale collaborative digital preservation repository for academic and research library collections, serving researchers globally. It overlaps with NDL's role as a digital-preservation and discovery platform for published scholarly content.
Direct peers
- Koninklijke Bibliotheek (KB): The Netherlands' national library operates a national legal-deposit mandate with strong digital preservation programs (e.g., the KB e-depot for digital publications), directly comparable to the NDL's e-Depo system for e-books and e-magazines.
- Deutsche Nationalbibliothek: Germany's national library combines legal-deposit collection with extensive digital cataloging and is the closest European analog to the NDL in operating model, mandate structure, and national-scale digital services.
- Library of Congress: The Library of Congress is the United States' national library and legislative library, directly analogous to the NDL's combined role as Japan's parliamentary library and national bibliographic institution. Both operate under statutory mandates to collect and preserve national publishing output and serve legislative reference needs.
- British Library: The British Library is the UK's national research library and a major digital archive operator. It is comparable to the NDL in role (legal deposit library serving researchers and the public), scale of digital services, and operating model as a non-commercial national institution.
- National Library of China: China's national library performs the same legal-deposit, bibliographic, and digital-preservation functions at national scale. It is comparable to the NDL in mandate, government affiliation, and role as a primary national information institution.
- National Library of Korea: The National Library of Korea operates as the Republic of Korea's central national library and parliamentary library, with similar deposit-law collections, digital archive services, and a dual mandate serving government and citizens — a closely analogous East Asian counterpart.
- Bibliothèque nationale de France (BnF): BnF is France's national library, with a comparable legal-deposit mandate and large-scale digital heritage programs (e.g., Gallica). Its national scope, parliamentary and public service mix, and digital-collection systems parallel the NDL's role in Japan.
Others
- OCLC: A global library cooperative that operates shared cataloging infrastructure (WorldCat) used by research and national libraries worldwide. OCLC is not a direct competitor but provides enabling infrastructure that overlaps with the NDL's cataloging and discovery functions.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks4 records
Key highlights5 records
Customer concentration
National Diet Library social profiles
Digital presenceNational Diet Library financial estimates
Financial estimateRevenue estimate
Valuation estimate
National Diet Library leadership team
Management profileNumber of profiles
National Diet Library funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
National Diet Library M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about National Diet Library
What does National Diet Library do?
The National Diet Library operates as Japan's national library, collecting, preserving, and providing public access to all materials published in Japan. Its core offerings include the NDL Search online catalog system, the e-Depo system for collecting and providing access to e-books and e-magazines, and Digital Exhibitions showcasing unique collection materials — all delivered free of charge alongside in-person access at the Tokyo Main Library and Kansai Kan.
Is National Diet Library a public or private company?
National Diet Library is a private company. It is classified as state government owned and is currently operating.
When was National Diet Library founded?
National Diet Library was founded in 1948. It employs 501 to 1,000 people.
Where is National Diet Library based?
National Diet Library is headquartered in Tokyo, Japan, in the Asia region.
How does National Diet Library make money?
One revenue line is on record: government Funding.
Who are National Diet Library's main competitors?
Emerging players on record are Internet Archive and HathiTrust. Direct peers are Koninklijke Bibliotheek (KB), Deutsche Nationalbibliothek, Library of Congress, British Library, National Library of China, National Library of Korea and Bibliothèque nationale de France (BnF). OCLC is listed as an others.
Does National Diet Library have an API?
No public API is recorded for National Diet Library.
What industry is National Diet Library in?
National Diet Library's product category is National Library Services. Its primary akta.pro industry code is EDAEAGAC, Public Library Operations & Community Branch Management, with a secondary code of EDAEAGAD, Special Libraries (Law, Medical, Corporate, Government) Operations. Its NAICS code is 51921.