Habuya in Tustin, an okinawan dining place. Owned by an amazing and fierce okinawan lady. Best time to go is 10 min before they open because they fill up immediately, and the wait list grows to about 30 parties by 5:30
Irrawaddy Taste of Burma in Stanton - only place in OC that serves Burmese food.
Habuya Okinawan Dining in Tustin - serves Okinawan cuisine. Like the former, this is the only place in all ot OC that serves Okinawan food.
Habuya Okinawan in Tustin for Okinawan cuisine. The owners are from Okinawa and you truly will not find Okinawan cuisine anywhere else in OC. And despite Okinawa being part of Japan, Okinawan food is considered different from Japanese food.
I'm gonna be a little sneaky and say Club 33. I have no idea what food they serve in there, but since I'm in, that means I'm also in Disneyland for free.
But for a real answer, I'd probably go for Habuya in Tustin