Japan is a country that had lost the war. And through the food shortage in agony. The importance of food greatly, eating out. It is the most important manners one.
The case is the food doesn't like or not eating, should let employees give back without touch food.
Eating out. The container looks clean, such as fishbone was moving to the division include at the same angle, etc to show politeness. The attentive even delicate. The media to get good parenting from a young age of the person.