My family was probably a lower-middle class (or upper-lower class) when I was growing up in Japan (I live in US now). My dad was a salaried man so money was really tight about a week before the payday. My mom used to make super simple fried rice (she called it "pinchi kirinuke ryouri") during those days which has only two ingredients - left over rice and "katsuobushi". She simply fried rice with katsuobushi and seasoned with soy sauce, but I still remember (and I occasionally make this) how tasty it was!