asahi.com and asahi.com: English   http://www.asahi.com/home.html
Online sites for The Asahi Shinbun - 朝日新聞

Foreign Press Center   http://www.fpcj.jp/
The FPC was established in October 1976 as an independent, private and non-profit foundation with funds provided by the Japan Newspaper and Editors Association and the Keidanren (Japan Federation of Economic Organizations). It supports members of the foreign press in their work in Japan by helping them to overcome such barriers as differences in customs and language and to get "accurate information, gathered quickly and without waste."

Japan Times   http://www.japantimes.co.jp/
Succeeded Japan Times (1897-1918), Japan Times and Mail (1918-1940), Japan Advertiser (1939-1941), Japan Times and Advertiser (Oct 5-Dec 31, 1942), Nippon Times (1943-1956)
Newpapers and Microforms: S134S
Search Archive, 1999-
Almost all the domestic stories from the printed paper are online with their full-length text, as long as they come from JT writers and correspondents or from the Kyodo wire service. See instructions for searching for editorials.

Mainichi Shinbun    毎日新聞   http://www.mainichi.co.jp/

Nikei Net and Nikei Net Interactive- Japanese Business News Online   http://www.nikkei.co.jp/
Web access to the Nihon Keizai Shinbun and the former Japan Economic Journal
Nihon Keizai Shinbun: Ford Business Library -- recent three months; EAC: N691KE (Feb 1992-present)
Japan Economic Journal: Microforms--S6530; Library has 1985-1991

SankeiWeb  http://www.sankei.co.jp/
The Sankei Shinbun website - 産経新聞

Yomiuri Online and Daily Yomiuri Online  http://www.yomiuri.co.jp/
Yomiuri Shinbun - 読売新聞 

Zenshin http://www.zenshin.org/index.htm
週刊『前進』 published by the Japan Revolutionary Communist League.  Includes the full text of the weekly newspaper from 1939 to the present. Most recent year is searchable; full text is browsable back to 1939.