Going to Yoshinoya in Japan seems wrong somehow, but I'm sure that's me being snobbishly small-minded. :) I don't know if the one in Pasadena (at Hill and Colorado I think, next to Taipan and El Pollo Loco) was 24hours, but it specialized in bowls. Teriyaki beef bowl, chicken bowl, vegetable bowl if you pretended to healthiness. The name might even have been Yoshinoya Beef Bowl. Probably wasn't great food but I did appreciate the different flavor.

I suppose I could try learning how to cook it or other ethnic foods...

Hey, what are sushi/sashimi prices like over there? I imagine conflicting factors of "you're near the source", "everything's expensive in Japan", and "you're in Okinawa, not Tokyo, so not that expensive." But I remember the all you can eat sushi/sashimi in Vancouver for $18 Canadian a few years ago and sigh.