Instead of Kyubei, you might consider "Sushi Mizutani" which is also in Ginza.

With only about 10 seats, gives you a very personal experience with Mizutani-san.

My favorite Edo-style Sushi.

L'Hôtel de Mikuni had a nice japanese touch on the french cuisine, while not drifting towards "fusion" at all.

If you want something more casual, L'Atelier de Joel Robuchon in Roppongi Hills (near GH Tokyo) does good food.