Tokyo guide books
Your best bet is either at a bookstore in your home country before you leave or using resources on the Internet.
If you get to Japan without a guide, there are several other options: The airports (Narita and/or Haneda) have English language book stores and there are a number of stores in the city that have English language books and maps.
Maruzen Oazo (https://plus.google.com/114508196092140592493/about?gl=jp&hl=en)
Kinokuniya in Shinjuku, 6th floor (sorry - website is in Japanese only): http://www.kinokuniya.co.jp/contents/pc/store/Shinjuku-South-Store/floorguide.html
And, if you find yourself in Yokohama, you can find books in Eigo here:
Landmark Tower Kumazawa
http://www.yokohama-landmark.jp/page/floorguide/detail/?id=177
Enjoy!!
jdlawrence
United States