Cultual differences b/w Japan and Korea

When I visited Korea, I was surprised by their culture.
I thought Japanese and Korean cultures are similar, but they are quite different.
For examplample, there were many restaurants in Korea, but they are almost Korean food such as YAKINIKU.
In Japan, we have many kind of food restaurants.
Although I love Korean food, I can't eat them every single day.
I think Korean loves Korean food pretty much and Japanese eat many kind of foods everyday.