Table manners are the rules of etiquette used while eating, which may also include the appropriate use of utensils. Different cultures observe different rules for table manners. Each family or group sets its own standards for how strictly these rules are to be enforced.
If a meal come out in front of your eyes, will you eat that soon? When you come to Japan, you think why does Japanese put them hands together and say "Itadakimasu" before eating? This is a traditional custom in Japan. We cannot live without having a meal. However, life dwells in the things we eat, such as a fish, meet and so on. The reason Japanese put them hands together and say "Itadakimasu" before eating is to express their gratitude to a food.
After finishing to eat them, let's put your hands together and say..."Gochisou-sama". "Gochisou-sama" is the feelings of appreciation in regard to be able to eat a meal. By trying to do that, perhaps, you can feel the Japanese culture and more familiar the country, Japan.
We think the behavior which sipping while making a sound is shameful action in your country. In Japan, we don't make a sound when we eat pasta. If we make a sound, it is shameful action.
"itadakimasu" : before eating
"Gochisou-sama" : after eating
put your hands together : before and after eating