The Ginza district of Tokyo, literally "Silver Mint", is in the Chuo ward. It is considered the high fashion center of the city and contains many upscale shops and restaurants.
Weekends on Chuo-dori are Pedestrians' Paradise, with the street closed to motor traffic during the day. You can catch street music (nothing too loud) and performance, hawkers selling magical puppets which dance without strings, and thousands of other people to bump into.
Ginza is the home of Tokyo's oldest and most prestigious department stores; the most exclusive is probably Wako. And of course Louis Vuitton, Dior, Chanel and Prada have stores as well, as do most other fashion brands you can think of.