This article explores the differences in average heights between Japanese and Korean men and women. The average height for Japanese men aged 20-39 years old was 169 cm (5 feet 6 inches) in 2017, while Korean men were slightly taller at 173 cm (5 feet 8 inches). Similarly, the average height for Japanese women aged 20-39 years old was 158 cm (5 feet 2 inches) in 2017, while Korean women were slightly taller at 162 cm (5 feet 4 inches). Factors such as genetics, nutrition, diet, exercise, environment and lifestyle choices could be influencing these small differences between the two countries’ heights averages.