>>78358734while there's an ethnic component, it's well known that poor nutrition stunts body development.
due to the various periods of war and civil unrest leading to famine, japan's population was quite short. this changed in the modern era, leading to taller generations over time.
in addition, boobs are fat and for a long time japan had a low-fat high-activity diet. that changed post-war, leading to an increase in bust size over the generations.
