Japan’s ISSN National Centre, run by the National Diet Library, provides information about ISSN registration.
NDL online
Search the National Diet Library catalog and request materials or locate copies held by libraries across Japan.
About NDL online
Search the National Diet Library catalog and request materials or locate copies held by libraries across Japan.
NDL online is a website in our Academic Search collection, part of the Research & Data directory. It runs in your web browser, so there's nothing to install. The site is mainly in Japanese.
People usually find NDL online when they’re looking for api.
Not quite what you need? Close alternatives include ISSN National Centre for Japan, Web Archiving Project, and National Library Service of Italy — compare them below.
NDL online at a glance
- Website
- ndlsearch.ndl.go.jp
- Category
- Research & Data › Academic Search
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- Japanese
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
NDL online alternatives
Tools and sites you could use instead, ranked by how closely they match.
Japan's National Diet Library Web Archiving Project regularly collects and preserves websites published in Japan.
Search Italy's OPAC SBN collective catalog for materials held by participating libraries.
CiNii Books searches books and journals held by university libraries across Japan.
Search Germany's Union Catalogue of Serials for journal and periodical records held by participating libraries.
Search Handrit.is for digitized Icelandic manuscripts held by libraries and research institutions in Iceland and Denmark.
Popular in Academic Search
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NDL online FAQ
What is NDL online?
Search the National Diet Library catalog and request materials or locate copies held by libraries across Japan.
Can I use NDL online in my browser?
Yes. NDL online works on the web, so you can use it from any modern browser without installing anything.
Is NDL online working?
ndlsearch.ndl.go.jp responded when checked on Oct 6, 2026. Its current availability has not been confirmed.
What are the best alternatives to NDL online?
Popular alternatives to NDL online include ISSN National Centre for Japan, Web Archiving Project, National Library Service of Italy, and CiNii Books. We list 12+ options matched by topic, tags and features.
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