This photographic database contains Yomiuri Shimbun photographs from the 1950s to the present. Since this is a relatively new electronic resource, look for more material to be added in the future.
The largest digital image database in Japan, the Mainichi PhotoBank contains over 120,000 photographs from the prewar era, and over 200,000 photographs since 1998.
(京都大学電子図書館: 貴重資料画像) includes the Meiji Restoration database, National Treasure Konjaku monogatari, Goseibai shikimoku, and Fujikawa collection of medical books.
An open-access archive of digitized photographs, negatives, postcards, and slides of imperial Japan (1868-1945), its Asian empire (1895-1945) and occupied Japan (1947-52).