My absolute favorite is the curry as it’s made by Yayume sushi in San Ramon.
My absolute favorite is the curry as it’s made by Yayume sushi in San Ramon.
I can confirm that I have the same thing in my part of the US though. A lot of restaurants will offer sushi and ramen both on the menu, with some other dishes like katsu curry showing up here and there. I would say the best sushi/ramen places here do specialize (just like you said about Japan), but it's pretty common to see places which don't.
In fact, I'd never even heard of eating pork as anything other than well-done until I saw Gordon Ramsay cook a pork chop medium rare.
I think it's just down to people starting a 'foreign restaurant', there may just not be enough market for a specialty foreign food so you pack in a few popular dishes together and run a 'foreign country restaurant' instead of just a specialty place.
Certainly even in my corner of america (the pnw) where sushi is quite popular, we have a mix of places that just do sushi, or most do sushi and a few other dishes, or just a 'japanese restaurant'.