The list of API-providing databases

This is the list of API-providing databases. You can check whether the metadata you want to use is licensed or not.

For a general overview of using APIs, please refer to “How to use NDL Search API”. For a general overview of each database, please refer to “The list of NDL Search databases” (Japanese page only).

1. Databases providing Search APIs or Harvest APIs

Data provider

Databases which provide the metadata for NDL Search.

Repository number

The unique number of the databases in NDL Search. It is included in the item number of each metadata.

Data provider ID

Identification data which is used to specify a database.

Metadata use terms

○：You do not need to apply to use the metadata of the database.
△：You need to apply to use the metadata of the database.

On the application, please refer to “How to use NDL Search API.”
When a Creative Commons license is displayed on the metadata use terms, you do not need to apply to use the metadata. Please abide by the license.
By using open as the data provider ID, you can search and harvest the metadata which is open data (PDM, CC0).
Note: The terms below are the metadata use terms. If you want to know the terms about the content, you must check each database's content use terms.

Repository Number	Data Providing Database	Data Provider ID	Search API	Harvesting API	Metadata use term non-profit \| for-profit
R000000004	Japanese Periodical Index	zassaku	○	○	CC BY ⁽¹⁾
R000000004	Japanese Periodical Index (Online)	zassaku-online	○	○	CC BY ⁽¹⁾
R000000005	Shinsho Map	shinsho	○	×	○	△
R000000007	Current Awareness	awareness	○	×	○	△
R000000014	Aozora Bunko	aozora	○	○	CC BY
R000000016	J-STAGE	jstage	○	○	○	△
R000000020	Web Archiving Project（WARP）	warp	○	○	CC BY
R000000025	Institutional Repositories DataBase(IRDB)(Institutional Repository)	irdb	○	×	○	△
R000000030	The Japan P.E.N. Club Digital Library⁽²⁾	penclub	○	×	○	△
R000000032	Image database of Nara Women's University	narajo	○	○	CC0
R000000034	Digital Library of Ibaraki Prefectural Library	ibaraki	○	○	CC BY
R000000035	Kobe University Library Digital Archive Newspaper Clippings Collection	u-kobe	○	○	CC BY
R000000038	NARA regional historical materials catalog	nara-tiiki	○	○	CC BY
R000000039	Nara Prefectural Library and Information Center Mahoroba Digital Library	nara-book	○	○	CC BY
R000000046	Rare Books Collection / University of Tsukuba Library	tsukuba	○	○	○	△
R000000047	Online catalog of reading room of material related to Okinawa war (digitalized)⁽²⁾	okinawa-1	○	○	○	△
R000000048	Online catalog of reading room of material related to Okinawa war (not digitalized)⁽²⁾	okinawa-2	○	○	○	△
R000000050	KOTENSEKI SOGO DATABASE(Japanese & Chinese Classics) (Waseda University Library)	waseda	○	○	○	△
R000000051	Digital archive of books material of Japan Fisheries Research and Education Agency	suisan	○	○	CC BY
R000000054	Eichi no Mori Web (Miyagi Prefectural Library)	miyagi	○	○	CC0
R000000055	Special Collections of Hiroshima Central City Library	hiroshima-c	○	○	CC0
R000000058	Digital library of Sapporo Municipal Central Library	sapporo	○	○	CC BY
R000000059	Northern Materials Digital library of Hokkaido Prefectural Library	hokkaido	○	○	○	△
R000000061	Digital library of Tokushima Prefectural Library	tokushima	○	○	CC BY
R000000062	OSAKA PREFECTURAL LIBRARY OSAKA e-COLLECTION	osaka-n	○	○	○	△
R000000185	Digital library of Saitama Prefectural Library	saitama	○	○	CC0
R000000187	Chiba Digital Archive	chiba	○	○	CC BY
R000000189	Yamagata Prefectural Library Digital Library	yamagata	○	○	CC BY
R000000190	Ihatov Iwate digital library (Iwate Prefectural Library)	iwate	○	○	CC BY
R000000191	Web gallery of Kawasaki-City Library	kawasakishi	○	○	○	△
R000000193	Kanagawa Prefectural Library Digital Archive	kanagawa	○	○	CC0
R000000194	Gallery of rare pictures and books of Toyama Prefectural Library	toyama	○	○	○	△
R000000195	Materials about Gifu prefecture & Maps of Gifu Prefectural Library⁽²⁾	gifu	○	○	○	△
R000000196	Yokohama's Memory (Yokohama City Central Library)⁽²⁾	yokohama	○	○	CC0
R000000199	Digital Library of Shizuoka Prefectural Central Library	shizuoka	○	○	○	△
R000000202	Digital archive and gallery of Hakodate City Central Library	hakodate	○	○	○	△
R000000204	Rare Books Digital Archive of Miyazaki Prefectural Library	miyazaki	○	○	○	△
R000000205	Ohmi Digital Historical Road of Shiga Prefectural Library⁽²⁾	shiga	○	○	○	△
R000000206	Echigo Sado Digital Library of Niigata Prefectural Library and Archives⁽²⁾	niigata	○	○	○	△
R100000002	National Diet Library Catalog	iss-ndl-opac	○	○	CC BY⁽¹⁾
R100000002	NDL newly acquired bibliographic data	iss-ndl-opac-inprocess	○	○	CC BY ⁽¹⁾
R100000002	Japanese National Bibliography	iss-ndl-opac-national	○	○	CC BY ⁽¹⁾
R100000002	Foreign-language books about Japan at the NDL	ndl-boj	○	○	CC BY ⁽¹⁾
R100000002	Online Resources Published in Japan with ISSN	issn-online	○	○	CC BY ⁽¹⁾
R100000038	Online Catalog of Sapie Library	sapie	○	×	○	△
R100000039	NDL Digital Collections	ndl-dl	○	○	○	△
R100000039	NDL Digital Collections (Online Publications)	ndl-dl-online	○	○	○	△
R100000039	NDL Digital Collections (Open Data)	ndl-dl-open	○	○	CC BY⁽¹⁾
R100000039	NDL Digital Collections (DOI Assigned)	ndl-dl-doi	○	○	○	△
R100000046	Japan Atomic Energy Agency's Library Catalog	jaea	○	○	CC BY-NC
R100000049	Union Catalog of Materials for Persons with Disabilities in Japan	tenroku	○	×	○	△
R100000073	Digital Material for Persons with Print Disabilities	ndl-dl-daisy	○	○	CC BY⁽¹⁾
R100000074	Agriculture Library Information system - WebOPAC	nosui	○	○	○	△
R100000075	Okinawa Prefectural Library "Valuable Materials Digital Archive"⁽²⁾	okinawa-rare-digital	○	○	○	△
R100000086	Tokyo Metropolitan Library Edo-Tokyo Digital Collections	tokyo-metro-da	○	○	CC0
R100000087	Komazawa University Electronic unique collections	komazawa-univ	○	○	○	△
R100000088	NWEC Women's Digital Archive System	nwec-womens-da	○	○	CC BY
R100000089	Yamanashi Digital Archive（Yamanashi Prefectural Library）	yamanashi-da	○	○	CC BY
R100000090	Digital Library System for Ministry of Agriculture, Forestry and Fisheries	nosui-library-da	○	○	○	△
R100000092	Kyushu University Collections	kyudai	○	○	CC0
R100000094	Digital Archive System ADEAC	adeac	○	○	CC BY ⁽³⁾
R100000098	Media Art Database (Manga)	ma-db	○	○	CC BY
R100000099	Supreme Court Library Online Public Access Catalog	s-court	○	○	○	△
R100000100	Digital Collections of Keio University Libraries	keio	○	○	CC0
R100000101	Aomori Prefecture Library Digital Archive	aomori	○	○	CC BY
R100000102	UTokyo Academic Archives Portal	u-tokyo	○	○	CC BY-SA⁽⁴⁾
R100000103	Digital Archive Fukui	fukui	○	○	CC0
R100000104	Digital library of Gunma Prefectural Library	gunma	○	○	CC BY
R100000105	KULINE Rare Books	u-kyoto	○	○	CC BY
R100000106	Library of Education: Digital Collection of Rare Materials	nier-rare	○	○	CC BY (政府標準利用規約（第2.0版）準拠)
R100000107	Osaka Municipal Library Digital Archives	osaka-c	○	○	CC0
R100000108	Library of Education: Oraimono Digital Archive	nier-orai	○	○	CC BY (政府標準利用規約（第2.0版）準拠)
R100000109	Library of Education: Japanese Modern Textbook Digital Archive	nier-mode	○	○	CC BY (政府標準利用規約（第2.0版）準拠)
R100000110	Library of Education: Materials on Post-war education Digital Archive	nier-postw	○	○	CC BY (政府標準利用規約（第2.0版）準拠)
R100000111	The Ajinomoto Dietary Culture Library OPAC	ajinomoto	○	○	CC0
R100000112	Ryukyu／Okinawa-related Materials Digital Special Collections	u-ryukyu	○	○	CC BY
R100000113	Saga Prefectural Library Database	saga	○	○	CC0
R100000114	Kansai University Digital Archive	u-kansai	○	○	CC0
R100000115	Kyushu Sangyo University Library Digital Archive	kyusan	○	○	CC BY
R100000116	Shimane University Digital Archives	shimane-u	○	○	CC0
R100000118	DAITO BUNKA UNIVERSITY Digital Archives	daito	○	○	CC BY
R100000119	Hiroshima Shudo University Digital Archive	shudo	○	○	CC0
R100000120	Tottori Digital Collections	tottori-dc	○	○	CC0
R100000121	The Dietary Culture Library Digital Archives	ajinomoto-d	○	○	CC0
R100000122	KAMAKURA CITY LIBRARY	kamakura	○	○	CC BY
R100000123	Doshisha University Digital Collections	doshisha	○	○	CC BY
R100000124	Rekisaikan Digital archive	kyoto	○	○	CC0
R100000125	Tokushima University Library High Definition Digital Archive of Rare Materials	u-tokushima	○	○	CC BY
R100000126	Sanko Library Collection Search	sanko	○	○	CC0
R100000128	Center for International Children's Literature, Osaka Prefectural Central Library	osaka-jibunkan	○	×	○	△
R100000129	The Three Collections of Research Center for Children's Literature and Culture, Shirayuri University	shirayuri	○	○	CC BY-NC-ND
R100000132	Baika Women's University Library Catalog (Children's Books)	baika	○	○	CC BY
R100000133	Ishikawa Prefectural Library Comprehensive search system（SHOSHO)	ishikawa-da	○	○	CC0
R100000134	Kanagawa Museum of Modern Literature Collection Search	kanabun	○	○	CC BY
R100000135	Ryukoku University Library Digital Archives "Ryukoku-zou"	ryukoku	○	○	CC0
R100000136	CiNii Research	ciniir	○	○	○	△
R100000137	Japan Publication Registry Office⁽⁵⁾	jpro	○	○	○	△
R100000137	Japan Publication Registry Office (Printed Book) ⁽⁵⁾	jpro-book	○	○	○	△
R100000137	Japan Publication Registry Office (Electronic Book)⁽⁵⁾	jpro-online	○	○	○	△
R100000137	Japan Publication Registry Office (Audio Book)⁽⁵⁾	jpro-audiobook	○	○	○	△
R100000137	Japan Publication Registry Office (Electronic Book) (Repository)⁽⁵⁾	jpro-online-repository	○	○	○	△
R100000137	Japan Publication Registry Office (Electronic Book) (TTS)⁽⁵⁾	jpro-online-tts	○	○	○	△
R100000138	Nagoya Collection	nagoya	○	○	○	△
R100000139	Chiba University Academic Resource Collections - c-arc	chiba-u	○	○	CC BY
R100000140	OTEPIA Kochi Library collection search	kochi	○	○	CC BY
R100000141	National Institute of Informatics Accessible Metadata Database for Persons with Print Disabilities	irdb-pub	○	×	○	△
R100000142	Rare Material Collection of Hiroshima Prefectual Library	hiroshima	○	×	CC BY-NC-ND
R100000143	Ibaraki University Digital Collection	ibaraki-u	○	○	CC0
R100000144	Kobe University Library Digital Archive Special Collections	u-kobe-s	○	○	CC BY⁽⁶⁾
R100000145	Minamata Studies Archive	minamata	○	○	CC BY-NC-SA
R100000146	Deep Library	dlib	○	○	CC0
R100000147	Okura Institute of Spiritual Culture Library Book Search	okura	○	○	CC BY
R100000148	Shibata City History Library	shibata	○	○	CC BY
R100000149	AICHI PREFECTURAL LIBRARY DIGITAL ARCHIVE	aichi	○	○	CC0
R100000150	Meiji University Digital Archives	meiji-u	○	○	CC BY
R100000151	Tokai National Higher Education and Research System Academic Digital Archive	tokai-h	○	○	CC0

^^^^^^^^^
The terms of use of the metadata which are created and provided by National Diet Library (NDL) are compatible with CC BY.
Please check “Terms of Use of the National Diet Library's website” for details.
^^^^^^^^
These databases are under renewal. You cannot search the metadata of them now.
^
The terms of use of the metadata which are provided by Digital Archive System ADEAC
When you use the metadata, you should give credit as “The metadata of ADEAC originates from each institution which provide data on ADEAC. The license of the metadata is CC BY”.
^
The terms of use of the metadata which are provided by UTokyo Academic Archives Portal
When metadata of UTokyo Academic Archives Portal displays the license of the metadata, the license displayed has priority.
^^^^^^
The metadata provided by the Japan Publication Registry Office (JPRO) includes upcoming book metadata, printed book metadata, eBook metadata, and audio book metadata. Upcoming book metadata may be different from published book metadata. The data provider IDs of JPRO are as below.
- jpro： All metadata provided by JPRO
- jpro-book： The metadata of upcoming books and printed books provided from JPRO; subset of jpro
- jpro-online： The metadata of eBooks and audio books provided from JPRO; subset of jpro
- jpro-audiobook： The metadata of audio books provided from JPRO; subset of jpro-online
- jpro-online-repository： The metadata of eBooks stored in the repository of the Digital Publishers Federation of Japan provided from JPRO; subset of jpro-online. The metadata includes "リポジトリ収録資料" as "Collection (particular)."
- jpro-online-tts： The metadata of eBooks which have a text to speech function provided by JPRO; subset of jpro-online. The metadata includes "TTS対応（Text to speech）" as "Digital File Characteristics."
^
The terms of use of the metadata which are provided by Kobe University Library Digital Archive Special Collections are CC0 or CC BY.
For more details, please check “連携コレクション一覧” (in Japanese).

Details of the National Diet Library (NDL) data providers

The catalog of the NDL

National Diet Library Catalog (iss-ndl-opac): The catalog of the NDL. It includes books published in Japan, books in non-Japanese languages, postdoctoral theses, maps, periodical volumes, and other materials in the NDL.
It does not include the below.

NDL newly acquired bibliographic data (iss-ndl-opac-inprocess)
NDL Periodical Index (zassaku)
NDL Periodical Index (Online) (zassaku-online)
NDL Digital Collections (ndl-dl)
NDL Digital Collections (Online Publications) (ndl-dl-online)

National Diet Library Catalog (Not Including Periodical Volume) (iss-ndl-opac-bib): A subset of the National Diet Library Catalog (iss-ndl-opac) that does not include the metadata of periodical volumes. It is equivalent to the metadata set which was provided as National Diet Library Catalog (iss-ndl-opac) until December 2023.
Japanese National Bibliography (iss-ndl-opac-national): A subset of the National Diet Library Catalog (iss-ndl-opac) that includes the completed metadata of the Japanese National Bibliography; Japanese publications acquired via the legal deposit system and Japanese publications and foreign publications in Japanese acquired through donation or purchase. The metadata has national bibliographic numbers. It does not include the metadata provided by the National Diet Library Newly Acquired Bibliographic Data (iss-ndl-opac-inprocess). It does not include the metadata of periodical volumes. It is equivalent to the metadata set which was provided as Japanese National Bibliography (National) (iss-ndl-opac-national) until December 2023.
National Diet Library newly acquired bibliographic data (iss-ndl-opac-inprocess): The metadata of the Japanese National Bibliography* currently being created. It can be acquired about four days after publications arrive at the NDL. Since it is unfinished metadata, it may be revised later. In SRU, you can also acquire the metadata by specifying inprocess=true.
*Not including maps and materials in Asian languages.
Foreign-language books about Japan at the NDL (ndl-boj): Published as a subset of NDL bibliographic data (iss-ndl-opac), foreign-language books about Japan (ndl-boj) comprises bibliographic records created after 2001 for books in Western and Asian languages on subject matter related to Japan or by authors who are either Japanese citizens or of Japanese heritage.

NDL Periodical Index

Japanese Periodical Index (zassaku): An index of articles from domestically published Japanese language periodicals (partly including foreign periodicals in Japanese and Japanese periodicals in foreign languages). The periodicals are selected based on the "JPI Periodical Selection Criteria.” Articles in the periodicals are selected based on the "JPI Article Selection and Indexing Criteria". It does not include the metadata of the NDL Periodical Index (Online) (zassaku-online).
See Also: The Japanese Periodicals Index
https://www.ndl.go.jp/en/data/sakuin/sakuin_select.html
Japanese Periodical Index (Online) (zassaku-online): An index of articles from Japanese language periodicals published on the internet. The periodicals are selected based on the "JPI Periodical Selection Criteria (Online)”. It does not include the metadata of articles of the NDL Digital Collections (Online Publications).

NDL Digital Collections

NDL Digital Collections (ndl-dl): NDL Digital Collections. The metadata of digitalized materials of the NDL. It does not include the metadata of the NDL Digital Collections (Online Publications).
NDL Digital Collections (Online Publications) (ndl-dl-online): NDL Digital Collections (Online Publications). The metadata of publications on the Internet which the NDL acquired after July 1, 2013, and publications by the NDL on the NDL homepage.
NDL Digital Collections (Open data) (dl-open): The open metadata of the NDL Digital Collections (ndl-dl) or NDL Digital Collections (Online Publications) (ndl-dl-online). Its license is equivalent to Creative Commons Attribution License 4.0.
*The license for content is described in the metadata.

Other

NDL Online Publications (Article) (ndl-article-online): The metadata of articles from online publications. It includes the metadata of the NDL Periodical Index (Online) (zassaku-online) and the article metadata of the NDL Digital Collections (Online Publications) (ndl-dl-online).
Online Resources Published in Japan with ISSN (issn-online): Bibliographic data of domestic online resources with ISSN, which have been registered and are maintained by the Japanese National Centre for ISSN.

2. Related pages

17. How to use NDL Search API

API仕様の概要