This article explores the maximum age of Japanese citizens, which experts believe could be as high as 120 years old. It looks at factors such as genetics, diet, exercise levels, mental wellbeing and stress management that contribute to their longevity. It also discusses how advances in healthcare and lifestyle changes have helped increase the average life expectancy in Japan from 65 years old for men and 70 years old for women in 1950 to 80 years old for men and 86 years old for women in 2016.