Magazines, newspapers, literature:
ALC Press Japanese Textbook Series
No.1 publisher for Japanese textbooks from Japan (in English)
http://www.alc.co.jp/nihongoji/ns/jts/index.html
Asahi Shinbun
Japanese newspaper (in English/Japanese)
http://www.asahi.com/english/english.html
Japan Times
Japanese newspaper (in English)
http://www.japantimes.co.jp
Mainichi Shinbun
Japanese newspaper frequently containing video news (in English/Japanese)
http://mdn.mainichi.co.jp
Entertainment: Manga, Movies, Music, etc.:
J!-ENT Japanese Dorama Database
Most comprehensive Engl. Database for Japanese TV-Drama series (in English)
http://www.nt2099.com/DORAMA
Midnighteye
Most comprehensive japanese website for movies (in English)
http://www.midnighteye.com/
KFCCinema
More than 50 DVD/VCD/theatre reviews of J-Movies including many pictures (in English)
http://www.kfccinema.com/reviews/other/japan.html
Oricon
One of the most influential music magazines in Japan (in Japanese)
http://www.oricon.co.jp
The Movie Times Japan
Find all weekly movie releases and box office charts for Japan (in English)
http://www.movie-times.net/JAPAN.PAGE.HTM