The Ginza area is a hot spot if you want to show off, go shopping and buy luxury goods, a lot of department stores are regrouped there, there is even a metro stop called after one of them (Mitsukoshi mae).
Just like the Boulevard Haussmann in Paris, it took a massive fire at the end of the XIX century for an architect to redesign the area. gradually it became the place to be seen for the Tokyoites until the great earthquake in 1923. The area, guess what, was rebuilt one more time and again regained its fame for nice buildings, high end shopping.
After the war, the reputation came back and nowadays, Ginza is packed with Chinese tourists coming for luxury goods, so much so that restrictions are in place in most shops that the Japanese themselves can get access and stock of those, should they want to buy any.
Nightlife is trendy there, although very expensive. however, if you go down the avenue towards Shimbashi, then, it becomes food paradise, plenty of izakaya, all types of bars and cafes. Ginza Corridor for brasseries, oyster bars, etc.