Check out these websites for information on Japan overall, as well as Tokyo and surrounding areas.
Japan
http://www.yjw2009.jp/eng/index.html
http://www.yjw2009.jp/eng/pdf/YJW2009GuideBook_eng.pdf
http://www.planettokyo.com/
http://www.japan-guide.com/
Japan Local area
(Takaosan)
http://www.takaotozan.co.jp/takaotozan_eng1/index2.htm
(Kamakura)
http://www.city.kamakura.kanagawa.jp/foreign01_english/index.html
(Nikko)
http://www.city.nikko.lg.jp/kankou/shaji/english/main.htm
(Tokyo)
http://www.japan-guide.com/e/e2164.html