Had a terrible experience here with a group of friends and the food definitely isn't nearly good enough to make up for it (decent at the best of times).
A number of us went to Ginza hoping to get the sushi happy hour. The staff asked if we wanted to be seated in a tea room and we said why not. We didn't find out until we got our bill that that meant we didn't get half price sushi anymore. We talked to the hostess and then the manager and not only did no one offer anyone any kind of refund, they wouldn't even give an apology or admit any degree of fault in the situation. By the end of the ordeal, all we wanted was someone to say 'Sorry, we should have been more up front about not getting the discount in the tea room' or even (for maximum responsibility-dodging) 'Thanks for the suggestion, in the future we'll mention that the tea room doesn't qualify for the discount.'