This article explores the Japanese diet, which is known to be one of the healthiest diets in the world. It consists mostly of plant-based foods such as vegetables, rice, noodles, seaweed and tofu, as well as some fish and fermented foods like miso and natto. Eating fish regularly provides essential omega-3 fatty acids while vegetables provide vitamins, minerals and antioxidants. Exercise and stress management also play a role in longevity among Japanese people. This article provides insight into why Japanese people live longer than other populations.