Is a frog waterproof?
The town I live in as well as every town I've visited on four continents has those kind of areas. However, like any place, just be aware of your surroundings, stay out of dark alleys, don't run up a bar tab, keep your wallet in your front pocket, and enjoy the tourist attractions. When I traveled in Japan a few times, the people were pleasant and helpful in big cities and smaller, off the beaten path, areas. Plenty to see, take lots of money.
Dennis