I understand now the intention, but was not sure at the movie. And it felt awkward to me that they had done a physical mash-up, which in a lot of darker futuristic movies is a device used to imply a takeover of some sort (usually a sort of post-apocalyptic vision of a world after a big war -- especially if a dictator had taken over and changed everything to reflect him). What felt the most awkward was the Golden Gate Bridge (clearly recognizable) but with the changes to look Japanese.
And I don't immediately think of WWII when I think of Japan either, but the "mash-up" idea, especially with the name and known structures, I think was just ill-conceived, given its use in other movies to represent a takeover. It could be seen in a way of suggesting an alternate history where the Japanese empire had taken over America -- which to a lot of people who knew people who fought in WWII and saw it as the struggle for freedom worldwide, could be taken the wrong way, at least without explanation.
Now, the movie itself had a whole different tone, which totally told me that that was not the intent. It just left me a little confused as to why they did it in the first place, if it didn't really advance the story. I better understand now, and I do appreciate the east-meets-west idea. Just making a point, though, that its execution by physical mash-up seemed ill-conceived, to me. Simply having people of various backgrounds coming together could have been enough. (More like cooperation, less like homogenization.)
Changing the subject, I do wonder if anyone else almost "felt" EPCOT in the science fair scene. Even the music reminded me of it.