Non-hotel places for having breakfast in Tokyo ?

My friends and I are going to Tokyo next month. Our stay has already been arranged, sister of one of my friends has a house there, so the only two things we would need money for are food and electrical goodies we intend to buy. Do you know some non-hotel places for having breakfast in Tokyo?

When I have been in Tokyo I have always ate breakfast in Caf in Westin Tokyo. If you cannot find a way just call 3 5423 7778/ Pastries, breads, juice, coffee and tea, that is what you can get fro 1200 Yen. Desserts are around 900 Yen, while lunch and dinner cost around 1500 for a set menu (pizza, dessert and beverage, for example).