What to Expect
Ginza and Shinbashi are pretty close each other, but very different.
Ginza is very hlgh elegant, gougeous town, on the other hand Shinbashi has downtown and traditional atmosphere.
I beleive you can enjoy both by sightseeing, food, and shopping.
GINZA SIX (newly opened shopping and restaurant building)
Shopping at so called "Antena Shop" of some prefecture
New Shinbashi Building (traditional historic atmosphere building)
Local food such as "Ohsyo Gyoza (fried dumpling)" or Japanese local food.
Shopping at famous "Don Quijote ".