Historical Newspaper Databases
Kikuzo Visual II for Libraries 聞蔵IIビジュアル for Libraries ID 朝日新聞 (1879-present).
Maisaku 毎日新聞 ID (1872-Present)
Keijo nippo 京城日報 / Kyŏngsŏng ilbo 경성일보 (1915-1944) ID Online access to full image reproductions in pdf format of an official Japanese-language newspaper from colonial-period Korea.
Taiwan jihō 臺灣時報 ID
Keyword searching and scanned full text in .pdf format for a Japanese-language journal published by the Japanese colonial government in Taiwan. Search terms may be entered using Chinese or Japanese. Includes the earlier Taiwan Kyōkai kaihō 臺灣協會會報 (note: the texts are in Japanese and the metadata may be searched in Japanese. The website, help files, etc., are in Chinese).
Taiwan nichinichi shinpō 臺灣日日新報 ID
Harvard-Yenching Microfilm FJ-50010 (includes the earlier Taiwan shinpō 臺灣新報)
Including both Japanese (1898.5 - 1944.3) and Chinese (1905.7 - 1911.11) editions. Search terms may be entered using Japanese or Chinese characters. Texts are in .pdf format; citations may be saved or emailed. Continues Taiwan shinpō 臺灣新報 (note: the texts are in Japanese and the metadata may be searched in Japanese. The website, help files, etc., are in Chinese).
The Hoji Shinbun Digital Collection Hoover Institution, Stanford University
ProQuest Historical Newspapers: Chinese Newspapers Collection (1832-1953) This historical newspaper provides genealogists, researchers and scholars with online, easily-searchable first-hand accounts and unparalleled coverage of the politics, society and events of the time.
Japan Times (1897-2014) ID
The Trans-Pacific (Sep 1919 - 1921) Via Hathi Trust.
Japan Weekly Mail 1870 (Vol.1, #1-50)
The Anglo-Japanese Gazette (Vol. 1-2, July 1902-June 1903)
NK News News from North Kore
Westlaw Japan Legal news, publications, and all legal precedents and current laws are searchable in this database.
Microform and Print
From the Harvard collections (links are to Hollis listings):
郵便報知新聞 Yūbin hōchi shinbun (1872-1894)
日本初期新聞全集 Nihon shoki shinbun zenshū (1857-1873) in 67 volumes.
幕末明治新聞全集 Bakumatsu Meiji shinbun zenshu (1853-1870) in 6 volumes.
赤旗縮刷版 (1961-2003, missing 1995)
Akahata [Microfilm] (1945-1960)
Gordon W. Prange Collection of newspapers and newsletters 18,047 newspapers and newsletters in microfilm 1945-1949 (in 3,826 rolls)
The Daily Yomiuri (1955-2002) [microfilm]