Even if you've never been to Japan you've probably heard or in some way or the other know that it's polite to take off your shoes when entering someone's home. But this can be confusing when other buildings such as offices, temples, and restaurants. There are, however, a few cues you can pick up on. If there are slippers around the entrance; you are then expected to take off your outdoor shoes and put on the slippers. Also, if the surface is raised at the entrance it's safe to assume that you are expected to take off your shoes before entering.