Getting back to Hisaka's question about sushi...
We have three restaurants that serve sushi here in Rehoboth Beach, Delaware. That's not bad for a town with less than 2000 population. (Of course, the rural areas outside of town also come in for the restaurants during the winter, and RB is a resort town during the summer.) I would personally recommend two of the three restaurants.
My partner, der Brucer, decided to give sushi a try less than a year ago. He's discovered that he loves eel and tuna, among other kinds of fish. He's still unsure about eating urchen, however.
That's the good news. The bad news is that very little Japanese food other than sushi. One of the three restaurants is noted for it's teppan grills, which is more about the chef's performance with his knives than great food. I personally love sukiyaki, but nobody prepares it here. We don't even have a place where good noodles can be found!
Part of why Japanese food is taking so long to become popular here in America is because of the insistance on great ingredients, and knowledgable chefs to prepare the food. Sushi became popular because the different kinds of fish used could be flown from coast to coast in the 1970s. Before then, finding the top quality fish was very difficult. Good sushi chefs from Japan took advantage of the good fish available, and moved to America to introduce us to what delicacies they could serve. However, other kinds of Japanese foods haven't become as popular yet, because we don't have the chefs who can properly prepare them.