Ginza serves a good variety of sushi and sashimi in a setting that is somewhat upscale but still comfortable enough for one to go there for a causal dinner. Most of the sushi is good. Not amazing, but the regular rolls are solid and some of the specialty rolls are very good. My personal favorite is the Greenwich roll. Prices are reasonable, even by Pittsburgh standards, and the restaurant is BYOB.
The service was a little rocky when the restaurant opened, but it has steadily improved since then and now is good. I wouldn't celebrate my wedding anniversary there, but it seems like a good place to go with friends or your partner for sushi.