Can it be both?
When I lived in Japan, my favorite regional cuisine was Okonomiyaki. Since I lived in Kansai, Okonomiyaki-ya were everywhere. We had a favorite just outside of the city of Otsu, though Kyoto had its fair share of decent restaurants as well.
It wasn't until I left Japan that I realized
A) Okonomiyaki was very much a regional delicacy: it was even hard to find decent Okonomiyaki outside of the Kyoto/Osaka area and
B) it was nonexistent in the States. I've never seen a Japanese restaurant offer Okonomiyaki, though I heard rumors of one in NYC that did.
Japanese cuisine -- okonomiyaki (savory pancakes)