It's funny when she asks my opinion of what to have for supper because my answer is always the same--up to you, it's all good.
Another fave is okonomyaki, which she translated for me as "everything you like, fried."
Can't remember if I've brought it up before but it's a large savoury pancake topped with (the way she makes it--there are numerous styles) pork belly, shrimp, scallops, shredded cabbage, seaweed flakes, Kewpie Mayo (the best kind of mayo), and Bulldog Sauce. I could be leaving stuff out here.
And then there's nabe--google this fucker; it's simple yet amazing. It's the Japanese equivalent of what we'd call boiled dinner around here.