Book Citation Index is the only one citation search database of scholarly book in the world.

・Covers more than 60,000 books include Social Sciences, Arts & Humanities and Natural Sciences.
・We continue to expand the index coverage with an additional 10,000 new titles each year.
・Content is comprised of scholarly books, both Series and Non-series that present fully referenced articles of original research, or reviews of the literature.

CiNii Research, launched in April 2021, is an academic information search service provided by the National Institute of Informatics (NII).
It allows users to cross-search various information on research activities, including research data, articles, books, doctoral dissertations, and project information.

* CiNii Articles has been merged with CiNii Research on April 18, 2022.

“NDL Search” is a new search service of National Diet Library.
This service aims to be an access point from which you can use affluent knowledge from public libraries, archives, museums, institutes of academic research and NDL.

- Search target of the National Diet Library search
- Help - National Diet Library search

Developed cooperatively with scholars and librarians worldwide, Oxford Bibliographies offers exclusive, authoritative research guides. Combining the best features of an annotated bibliography and a high-level encyclopedia, this cutting-edge resource guides researchers to the best available scholarship across a wide variety of subjects. Oxford Bibliographies is updated regularly, with 50-75 articles added per year to each subject area. Check back for updates and to see what's new. 

Kyushu University Collections is a comprehensive database of academic contents provided by Kyushu University library, where you can search and access printed books and journals in the university, subscribed and open access e-journals and e-books, Kyushu University Institutional Repository (QIR), digitized images of our rare materials, and more.

Online catalog of Fukuoka Prefectural Library.

Fukuoka Libraries Federated Search.