It's a novelty there. But I think the point is that in Japan, healthy and local but fast food is something you can get at a train station, while that's rare in the U.S. I'm in and out of Union Station (DC) and Penn Station (NYC) all the time. What can you get to go in those places? Besides McDonalds, Pizza, Chipotle, etc., you've got deli sandwiches. Which are just awful in comparison to the options you have in Japan. (And even the deli sandwiches are better in Japan--the random place at the airport is comparable to what you can get at the specialty Italian market near my house.)