Japanese are obsessed about where you sit at the table. There is a hierarchy of seats and the guest of honor must always sit in the most important seat. Seat importance is usually determined by how far it is from the entrance and whether your back is facing something solid.
One other thing to add is never blow your nose at the table. It's considered extremely rude.
I think most of the same table manners apply whether you're Japanese or American. You shouldn't talk with your mouth full and you shouldn't play with your fork, knife, chopsticks etc.
The area where I've noticed differences are when it comes to alcohol. Japanese never pour their own liquor and the host always has to make sure that you cup is full. I guess it's rude to have your guest dine with an empty glass of liquor.
The other things I've noticed is that it's okay to slurp your noodles and make funny sounds. Making the slurping sound is supposed to be an indication that the noodles are tasty.
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Japanese are obsessed about where you sit at the table. There is a hierarchy of seats and the guest of honor must always sit in the most important seat. Seat importance is usually determined by how far it is from the entrance and whether your back is facing something solid.
One other thing to add is never blow your nose at the table. It's considered extremely rude.