Apart from the extremes of heteromorphic differences that can occur between different populations of humans, and the small chance that a very small woman might

Apart from the extremes of heteromorphic differences that can occur between different populations of humans, and the small chance that a very small woman might give birth to a very large baby.. What does any of that have concretely to do with society being Homogenous? What evidence do you have that Japan is actually Homogenous? How do you define that.. There is great diversity in Japan...