[Sangetsu]

Japan is a very homogeneous society, perhaps 1% of the population is made up of foreigners, and of this 1%, 90% are Asian. The number of Western/European foreigners is very small, most of the foreigners you actually see are tourists and not residents.

The numbers of foreigners have been decreasing as of late due to layoffs in Japanese industry. Brazilian factory workers are being paid by the government to go home, and many of the expats who work in the financial industry have returned home as well.

The only places you'll find the sidewalks crowded with foreigners is Akihabara (where busloads of Chinese are dropped off to shop), and Roppongi, where the western foreigners tend to gravitate to. As mentioned, most of these are tourists.