Japanese food is the most disgusting I know of. Pick any random dish and there's a 50% chance it will be disgusting to me and untrained people in general. That said, it's supposed to be healthy - I would love to like it.
Most food is acquired taste, thabs to our evolved brains that instinctively avoid potential poisons. Eat it five times, don't die, and it becomes palatable
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.
