Is it rude to not finish your food in Japan?

Not finishing ones meal is not considered impolite in Japan, but rather is taken as a signal to the host that one does not wish to be served another helping. Conversely, finishing ones meal completely, especially the rice, indicates that one is satisfied and therefore does not wish to be served any more.

Is tipping rude in Japan?

Overall, tipping in Japan is not customary. The Japanese culture is one that is firmly rooted in dignity, respect, and hard work. As such, good service is considered the standard and tips are viewed as unnecessary.