I am not sure if I went to Ginza on an off-night, but my experience there was pretty bad. First of all, I would like to point out that the restaurant itself is a converted Five-and-Diner with an exterior that was made to look like like an old-fashioned soda shop. Ginza has thrown a gaudy, green neon sign on the chromed-out edifice of the old restaurant. I would not have stepped in to the place based on looks, but because it was the only sushi restaurant identified on Yelp to be near my location at the time, and because it had a four-star rating, I decided it was worth a shot.
I sat at the sushi bar. The chefs seemed disinterested if not depressed. I am used to sushi chefs who are anxious to make me something, yelling out "What's next?" At Ginza, they seemed almost intimidated by the customer before them: me. The food was so-so. I was disappointed by the portions. The sushi was sliced so thin I would call it "miserly." I could understand if I had ordered all-you-can-eat, but I was eating a la cart.
One test I have for a sushi restaurant is to see how fresh the mackerel is. Mackerel is a very fishy fish. I know this. I feel that if you do not have fresh mackerel you should not have mackerel on your menu. The mackerel at Ginza was extremely fishy and almost acidic as though it had been cured. Maybe that is a way to serve this type of fish, but I have never had it that way before and it was unpalatable.
Once again, maybe I was there on an off-night. The only reason I would go back there is under the confidence of a trusted friend who knows sushi.