This article provides an overview of the factors that influence ideal weight in Japan, including height and weight charts, calculating body mass index (BMI), recommended daily calorie intake, popular diets to achieve ideal weight, and tips to maintain a healthy weight. It discusses the average height and weight for Japanese men and women, as well as how gender, age, lifestyle habits, medical history, genetics and more can affect an individual's ideal bodyweight. It also provides information on recommended daily calorie intake and popular diets in Japan.