Both buildings are around 12 stories tall. In Japan many many restaurants have a case in front showing all the entr es. Here are some of the restaurants in this these buildings. Rakeru is a chain of restaurants that specialize in egg dishes. They are fairly popular.
Most restaurants specialize in one or two things.
This one is katsudon. Fried stuff with tonkatsu sauces. This one serves udon and soba noodles. Both can be served hot or cold. Then you pickup some noodles and dip them in the broth and then eat them.