Steeped in tradition and history the Japanese have made sushi is one of the most delicious and attractive dishes I can think of. Here's some cool pics of sushi and sashimi as well as a few tips on what to do (and NOT to do) with it
In more traditional sushi-ya, if you are not given a spoon for your soup, do not ask for one. You are expected to pick up your bowl to drink the soup, using your chopsticks to direct the solid pieces to your mouth.
Slurping noodles is OK, less so for soup, but a bit is fine, at least by Japanese standards. Belching is considered impolite at the Japanese table, unlike some other Asian cultures.
Technically one doesnt drink sake with sushi (or rice in general) only with sashimi or before or after the meal. It is felt that since they are both rice based, they do not complement each other and therefore