The times I have been in Japan their dinner's feel, as an American, extravagant, but they aren't.
Case in point, my mom and I stayed with my grandmother at a hotel near where the Battleship Yamato was built that had a restaurant in it that the breakfast and dinner meal was included in your room price. Breakfast was pretty straight forward. Usually some eggs, a salad of some kind, and some fish or chicken.
Dinner? Miso soup, rice, some salad, and then some sort of fish, chicken, or pork dish (if it was pork it's usually tonkatsu so that was rare).
Similar to this: