[Sangetsu]

Uniqlo all the way... it is the quintessential Japanese clothing brand. You'll find their stores pretty much everywhere (even in Tokyo Station).

Seriously, most Japanese people don't care for Japanese labels, the prefer European and America stuff. Most of my co-workers seem to favor Paul Smith at the moment (which costs about 40% more here than in America or Europe).

If you want something Japanese, you're better off with an accessory, something from Porter, or Takeo Kikuchi.