[joeyj]

Yakuza don't bother foreigners unless you purposely try to make trouble with them. I've been around them in the countryside and in Tokyo (not actually hanging out with them, just walked by) and they didn't even bother to look at me.

Also, I walked down some of the worst streets in shibuya and shinjuku and no one bothered me, the danger level is pretty laughable compared to the states... You might get a few rude Japanese that will make comments about you, but the majority of people are really nice.

Good luck and have fun!