The popularity of Japanese cuisine has been growing around the world, in part because it's low in calories. In Japan itself, however, traditional food is losing favor. Young people, in particular, have become accustomed to a Westernized lifestyle. Many of them lack a familiarity with their own country's dishes. Some lack even the most rudimentary knowledge, such as how to make soup broth. A restaurant recognized by Michelin three years in a row has started cooking classes to reacquaint Japanese people with their own cuisine.