Like Spain, Japan also has rules on dining etiquette. While it won’t land you in jail or publicly beaten, rudeness is not a good look, especially while travelling.
If you find yourself in Japan enjoying the cuisine, make sure not to clean your whole plate if you are full. Clearing your plate signifies to the host that you need more food. Your host will then bring you more food. If you are full, leave a little bit left on your plate. Not touching a new plate that is brought to you also looks rude to your host.