I thought this article explains well about Japanese food education;
http://www.businessinsider.com/japans-amazing-school-lunch-program-2017-3/#lunchtime-in-japanese-primary-schools-is-almost-sacred-it-isnt-hurried-or-hasty-kids-get-the-time-just-to-sit-and-eat-1
Japanese poeple learn how to choose nutritious food, and conbination of food by eating well balanced lunch at school.
Our Bneto Box cultuer is also for the same reason.
Ask Japanese people what their favorite menu was in school lunch. I bet people have at least one or two favorites!