Is Han Dongmeng's blood relationship the same between China and Japan?

China, Japan and South Korea are all accompanied by large settlements and small mixed communities.

On the whole, the ethnic groups in China and Japan remain basically stable, but fresh blood keeps entering.

China is mainly the assimilation of nomadic people in the north to the south, and the assimilation of ethnic minorities in the south by Han people.

Japan is dominated by aborigines, but deeply influenced by immigrants from South Korea and China.

South Korea is a bit complicated, and the Han people have long been resident. Even during the Three Kingdoms period, primitive tribes were mixed with Han Chinese. Relatively speaking, South Korea is a little unstable, but the ethnic groups in these three countries are scattered, which is not the same thing.