I have a couple of questions regarding proper behavior at sushi bars.
1) At a sushi-ya where you are served on geta, are you supposed to take down the entire geta in order to eat your sushi when an order is placed upon it and then return it to "the ledge" when you are done with that order, or are you supposed to just leave it there and eat each piece of nigiri/sashimi/etc. off of it?
2) If I need to leave my seat before I am finished with my meal to use the restroom or blow my nose do I need to excuse myself? If so, what is the proper way to go about doing this?