Canon has closed the old Canon Salon photo gallery and service center in Ginza and reopened on April 25, 2005 at a new location 2 blocks away nearer to Higashi Ginza. They now have a new place called Canon Plaza Ginza.
It houses the new Canon Gallery Ginza, Canon Digital House Ginza, and the newly-named Canon Service Center Ginza (2nd floor). It includes a product showroom which occupies most of the new space.
http://cweb.canon.jp/canonplaza/ginza/info/open.html
It’s open from 10:00 am to 7:00 pm. Near Ginza subway station, exit A12 or Higashi-Ginza Station, exit A8.