We decided to try Ginza one random night for sushi as we were looking for some new places to try.
We ended up ordering the Ginza Mountain and a Ginza roll. The Mountain was HUGE! Tons of fish in there. Everything seems pretty fresh to us, which is probably the most important factor with sushi. It was all pretty good, however, a lot of the menu includes tempura including the Spicy Yellowtail and Ginza roll. I have to say I'm not a big fan of that. If I want tempura, I'll get tempura separately. Otherwise the food was decent if not particularly inspired.
A couple of items to note: This is a BYOB establishment, so plan accordingly (we didn't unfortunately). Interestingly, their spicy was not particularly spicy. I'm used to more spice than this, which was a little disappointing.
Overall this was a pretty good deal for sushi, so if money is a major factor, this is certainly a place to consider. However, I think there are other better places for sushi in the city.