The US government also subsidizes corn, soybeans and wheat over fruits and vegetables, making it far cheaper to produce meats, carbs and sugars, and thus easily undercuts any other food types. It can be more expensive to buy a head of lettuce than it is to buy a hot dog.
https://en.wikipedia.org/wiki/Agricultural_subsidy#/media/Fi...
I guess the best you can do is steal the best ideas from everyone - Japanese at least have zero issues with doing just that, going right back to first western contact with the Portuguese that brought them Tenpura and a bunch of cakes.
I still think the greatest fast food I've ever had was a Greek place that did amazing kabobs.
1) regardless of your safety beliefs, this is done a lot
The primary on-the-go food would be onigiri, with "festival booth" foods second (mostly stuff on a stick e.g. karaage, dango, yakitori, takoyaki, ikayaki).
It has amazed me that there isn't a USA chain that has taken some food from Japan or China and it put it in a form that would be a good burger substitute. I would imagine some wrap? I could really go for a spring roll when I'm driving instead of a burger.
They were pretty tasty, but the only one where I live went under ages ago.
(Googling shows that a chain by the name exists, but they don't have burritos. Either they pivoted or it's a new business who picked up the name.)
When I think pizza, I tend to think of it as its own thing given the whole delivery culture.
If you hit a bump eating a sandwich, you mash a soft loaf of bread into your face.
Do the same thing eating a kabob, and you're sending a skewer through the roof of your mouth.
Uhm... you can eat kabobs from the side.
https://www.npr.org/2016/02/11/466178523/like-millennials-mo...
Alas my go-to is still the classic New England general store steamer full of red hot dogs...
On the flip side, I'm originally from the South, where there's a huge number of gas stations which also include a diner (or even just a hot bar) which is often some of the best Southern food you can find, including "real" restaurants. There's actually an entire regional chain of gas station/convenience store/fast-food friend chicken places called Dodge's which I really miss. That being said, I used to drive between Mobile and North Mississippi pretty often, and there was a little place halfway along the way called the Buckatunna Grocery which I swear has some of the best fried chicken I've ever had.
How far are you going to have to go in Tokyo if you're craving Mexican? And is there even a decent Mexican restaurant in Tokyo? (I'm guessing the answer might be yes but not many.)
On the other hand, I understand KFC is very popular in Japan which happens to be one of my favorite US fast foods if I really need to choose.
Some types of fast food appeal to me more than others. I'm actually not much of a cold bento box fan in general; I usually end up picking at them at conferences. But I like a lot of Japanese food generally.
You'd be surprised.
https://www.tripadvisor.com/Restaurants-g298184-c29-Tokyo_To...
Tokyo has insane amount of good restaurants.
I don't think it's just a matter of density. Folks in Tokyo, like folks in New York but perhaps even more so, are willing to try a variety of foods and care about doing them authentically.
I really like some Xinjiang and Hunan dishes, but they're next to impossible to find in the US despite "Chinese" food ostensibly being common.
To have decent restaurants from a certain ethnicity, you do need some significant population of that ethnicity, and at least some of those people who are lower or lower-middle-class. Having moved to Seattle from New York, the Chinese food here is much worse; Seattle has a large population of Chinese people, but the vast majority of those are college-educated and working at tech companies, and are not a likely demographic for opening or running restaurants.