If you are ever invited to a local's house, it may be a good idea to bring a gift. It is certainly not expected, but it is very much appreciated. When arriving, pay attention to what the host is wearing. If he or she is not wearing shoes inside, then you should also take your shoes off before entering. If there for a meal, leaving a little bit of food on your plate shows that you are full, though leaving rice on the place is seen as wasteful. It also considered rude to take the last portion from a serving bowl, and it's important to wait to be asked before serving yourself seconds.