when you are not using your chopsticks place them on the holder.You shouldn't placed upright in your rice because this resembles a ceremony performed at funerals in Japan. Don't hover your chopsticks over all the dishes because this is considered greedy. Don't share food by passing from chopsticks to chopsticks because this resembles a custom at Japanese funerals. Don't cross your chopsticks when resting them on the table because that resembles people of funeral ceremonies. Don't point with your chopsticks when hold them and don't rup together because it is a sign that you think they are cheap.