While we're on books, here are some useful links for browsers:

http://www.geocities.com/evelynleeper/jp-north.htm
Northern Japan
http://www.geocities.com/evelynleeper/jp-tskba.htm     Tsukuba/Eastern
                                                           Tokyo
Suburbs
http://www.geocities.com/evelynleeper/jp-tokyo.htm
Central Tokyo (excluding Jimbocho/Hongo)
http://www.geocities.com/evelynleeper/jp-kanda.htm
Central Tokyo

(Jimbocho/Hongo)
http://www.geocities.com/evelynleeper/jp-hama.htm
Western Tokyo

Suburbs/Kawasaki/Yokohama
http://www.geocities.com/evelynleeper/jp-hama.htm
Tokyo Suburbs/

Kawasaki/Yokohama
http://www.geocities.com/evelynleeper/jp-cent.htm
Central Japan
http://www.geocities.com/evelynleeper/jp-kyoto.htm
Kyoto
http://www.geocities.com/evelynleeper/jp-osaka.htm     Osaka/Kobe
http://www.geocities.com/evelynleeper/jp-west.htm
Western Japan
http://www.geocities.com/evelynleeper/jp-misc.htm
Japan (miscellaneous information) 

John
http://rarebooksinjapan.com