They could likely say the same thing about randomly-selected dishes from your cuisine. You drink milk, like a baby? And not even your own species, but out of the bottom of a cow? And sometimes you let it go bad to the point where it solidifies? And sometimes you take THAT and let it grow MOLD?!
And it's not just the Japanese... Ask a Southern European what they think of Wonder Bread, for example.
And it's not just the Japanese... Ask a Southern European what they think of Wonder Bread, for example.