Eating Okonomiyaki: the anti-crepe
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Basically a pancake stuffed with meat and seafood (though you can add cheese), Okonomiyaki developed in post-World War II Osaka when food was scarce.
It's probably a lot more robust now then it was back in the day, but I think it's decidedly American in its origin since dry good rations like pancake mix was probably doing the rounds back then. Now after it's cooked they smear it with teriyaki sauce and you can squirt mayo on it, too. The hotel recommended we have it at a place called Chibo in the heart of trendy Namba.