Uw tips:Learn a few Japanese words and don't be frightened by the unknown.
Tokyo and Japan as a whole is an amazing experience.
Everyone is very kind, although a little reserved towards foreigners and the level of English spoken is little to none. However, put in a little effort and you're sure to get a result.
Restaurants are everywhere, shopping can be done in lots of places and you can easily get to your destination by train or taxi. There's nothing quite like walking along a street full of skyscrapers and suddenly finding yourself standing in front of a traditional temple.
A warning though, hotel rooms are generally small for western standards and beds can be very uncomfortable in the average hotel.
While getting to Japan is quite expensive, staying there is not. You can get cheap, filling meals for little money.
If you were still wondering whether to go to Japan or not, please just go!