After the Meal
When the meal is finished, offer a formal thanks by saying: “Gochisosama-deshita” or simply “Gochisosama” for less formal occasions.
If you ate with disposable chopsticks, place them neatly back inside of the small bag and fold the end. Otherwise, leave them sideways on your plate rather than pointing them at the person seated across.
If eating in a restaurant, chances are that your host will pay to follow the concept of saving face. If you pay, place your money on the small tray provided rather than handing it to the server or register attendant. If no tray is present, use both hands to give your money and receive the change.
Tipping is not common and is often considered rude in Japan. Read more about tipping in Japan.