Sushi and most of the other Japanese foods we get in the US taste pretty much the same. There are a lot of things, though, that we never see in the US. Soups with stomach and intestines in them, for instance.

Some aberrations are not available. In Hawaii, for instance, you can get Spam nori (meat, wrapped in rice, wrapped in seaweed). That is definitely not available. California roll sushi, however, is available.

There are lots of things like little grilled octopi on a stick, green peppers with sea salt on a stick, and a lot of things I won't eat on a stick. There is an omelet sort of thing called okonomyaki, that has many regional versions, that I have never seen in the US.