We have spent the last 4 winters looking for decent sushi in Tucson. We tried Ginza the other night, it is in the Ventana Mall at the intersection of Skyline and Kolb Road. The sushi was not as great as we are used to back east, but it was the best we have found here. The owner/chef Joon will prepare requests, and the menu contained a variety of choices. We would recommend it if you need a sushi fix.
Ed and Jude