This article explores how difficult it is to stay thin in Japan due to its traditional diet and lifestyle habits. It looks at the traditional Japanese food culture, exercise in Japan, the health and fitness industry, popular diets in Japan, and the role of technology in staying thin. Charles R Tokoyama, CEO of Japan Insiders provides his opinion on staying slim while living in Japan. With mindful eating habits combined with regular exercise and the use of technology such as calorie tracking apps, users can achieve their goals of staying slim.