For less than $4.00, you can have great Japanese breakfast at many of the fast food restaurants in Japan. As you can see, there is nothing in this menu that is more than 410 yen.
Of cause you can spend $20 ~ $50 at the hotel to have buffet breakfast, but it is fun to go to those fast food restaurant?
You pick the item you want, you usually buy a ticket as you enter the restaurant. No tipping.