Updated regularly. Provides access to various reference sources, including dictionaries (Japanese, English and multi-languages, such as the Dictionary of Synonyms in Japanese), encyclopedias (Encyclopedia Nipponica, Encyclopedia of Japan, Kodansha Encyclopedia of Japan, etc.), other Japanese reference works (biographies, maps, chronologies, etc.), full text Tōyō Bunko and Shūkan Ekonomisuto (Weekly Economist), and other visual and sound databases. Also includes its sub-series: 日本歴史地名大系 and 国史大辞典.
Web search portal for the Kyoto Institute, Library and Archives. The institute is formerly known as the Kyoto Prefectural Archives. Its collection include medieval manuscripts, administrative archives, literature, images, and catalogues from the Museum of Kyoto 京都文化博物館. Only items publicly available on the internet are searchable.
It searches the Meiji-era newspaper and magazines in Center for Modern Japanese Legal and Political Documents at the University of Tokyo. 東京大学大学院法学政治学研究科附属近代日本法政史料センター明治新聞雑誌文庫が所蔵する明治期〜昭和戦前期（1868〜1945）の新聞・錦絵新聞・宮武外骨蒐集資料（外骨書函）・吉野作造旧蔵資料（吉野文庫）などの所蔵情報を検索するためのデータベースです。
For more about how to use and request copies of the collected materials, see http://www.meiji.j.u-tokyo.ac.jp/.
The Digital Archive of Documents on Japanese Foreign Policy is a digital archive created and maintained by the Ministry of Foreign Affairs. The time coverage spans from the Meiji era to the end of WWII. Users have to install djvu extension to view the documents.
"A project of Harvard University’s Reischauer Institute of Japanese Studies, the Japan Disasters Digital Archive (JDA) is an evolving, collaborative space for citizens, researchers, students, and policy makers, as well as a site of shared memory for those most directly affected by these events. The digital archive is an advanced search engine for archived materials from all over the web, including websites, images, video, audio, news articles, individual testimonials, tweets, and other content, primarily from international partners who are building digital repositories about the disasters."
The Library of Congress digitized the Japanese Censorship collection in collaboration with the Japan's National Diet Library. It contains 1,327 marked-up copies of censored monographs and galley proofs for approximately 1,100 titles, mostly from the 1920s and 1930s. At present, 247 of the censored titles are available on the Library’s website for off-site viewing, but this number will continue to grow as more titles enter the public domain. All 1,327 items in the collection can be viewed on site at the Library of Congress.