NLC Collection of Republican Period Publications 中国国家图书馆特色资源（民国专栏）

NLC Collection of Republican Period Publications 中国国家图书馆特色资源（民国专栏）.
Developed by the National Library of China, this online collection of Republican period (1913-1949) publications includes full images of over 8000 books, full images of over 8000 legal documents, and the full text of over 4000 periodicals.
Adobe Reader 7.0 and above (Chinese version) is recommended for reading full [...]

Taiwan Periodicals Under Japanese Rule 日治時期期刊

Taiwan Periodicals Under Japanese Rule 日治時期期刊.
Developed by the National Taiwan Library (NTL), this database can be used to find articles in 79 periodicals (in Japanese language) that were published in the period of Japanese occupation (1895-1945). The citations are freely available over the Internet and the articles can be downloaded remotely with NTL card.
What [...]

Hong Kong & Macau Periodicals Network 港澳期刊網

Hong Kong & Macau Periodicals Network 港澳期刊網.
A joint project between the Chinese University of Hong Kong Library and the University of Macau Library, this database indexes articles published on over 300 Chinese and bilingual periodicals in Hong Kong and Macau. Coverage for most periodicals starts in 1980, but some important journals are indexed since the [...]

Yale University Divinity Library: Digital Collections

Yale University Divinity Library: Digital Collections.
Including several collections relevant to China studies, such as

China Christian Colleges & Universities Image Database
Internet Mission Photography Archive
Missionary Periodicals Database

ATLA Cooperative Digital Resources Initiative
Nanking Massacre Project
American Context of China’s Christian Colleges and Schools

KINDS: Korea Integrated News Database System

KINDS: Korea Integrated News Database System.
Developed by the Korea Press Foundation, this comprehensive full-text Korean news database covers national, local, internet, and industry newspapers, as well as magazines and TV reports since 1990. Among other things, it includes four major daily newspapers: Kyŏnghyang 京鄉, Tonga 東亞,
Sŏul 서울, and Han’guk 한국(1960 to 1989) and two newspapers [...]

Database for Japanese Books and Magazines on Modern Korea 近代朝鮮関係書籍データベース

Access here.
Developed at the Institute of Oriental Studies, University of Tokyo, this is a bibliographic database of books and magazines on Korea published in Japan between 1868 and 1945.

Columbia University Digital Collections on East Asia

The Columbia University Library Digital Collections include:

Bunraku Collection Gallery
Chinese Paper Gods
Ling long Women’s Magazine

Nara Women’s University Digital Collections 奈良女子大学電子画像集

Access here.
The most important resources are probably 女性関連資料画像, a database of 68 Edo- and Meiji-period books for women, and 阪本龍門文庫善本電子画像集, a collection of rare books. The full list of content is copied below:

奈良地域関連資料画像データベース

春日大社電子画像集

生駒山寶山寺所蔵貴重資料電子画像集

元興寺電子画像集

三輪山縁起

阪本龍門文庫善本電子画像集

談山神社電子画像集

宗祐寺電子画像

達磨寺電子画像

檀王法林寺電子画像

成覚寺所蔵電子画像

手向山八幡所蔵電子画像

興福寺所蔵電子画像

聖光寺所蔵電子画像

興福寺所蔵電子画像

奈良女子大学所蔵資料電子画像集

伊勢物語の世界

江戸時代紀行文集

岡潔文庫

画像で綴る 奈良女子大学の九十年

女性関連資料

雑誌 學習研究

雑誌 伸びて行く

雑誌 家事及裁縫

教育用掛図

伊藤博文卿 掛軸

春日権現霊験記繪巻

Special Collections of the National Library of China 国家图书馆特色资源

Access here.
Including publications from the Republican period, local gazetteers, and images.

Shao Center Database for Overseas Chinese Newspapers and Journals

Access here.
Developed at the Shao Center of Ohio University, this database can be used to find titles of overseas Chinese newspapers and periodicals.