This article discusses the normal weight range for Japanese women, which is between a Body Mass Index (BMI) of 18.5 to 22.9. Factors such as genetics, lifestyle, age, and diet can impact body weight, but maintaining a healthy weight is crucial for overall well-being and avoiding health complications such as heart disease, diabetes, high blood pressure, and certain types of cancer. The traditional Japanese diet consists of fish, vegetables, rice, and soy products which are low in saturated fats and high in nutrients. Regular physical activity is also important in maintaining a healthy weight. Seeking professional advice from healthcare providers or registered dietitians/nutritionists is advisable for those struggling with maintaining a healthy weight or have concerns about their weight and health.