What's the origin of the Japanese people ?

[Maciamo]

The Ainu haplogroup formed about 40% of the modern Japanese fatherline,and in fact Ainus have nothing to do with Caucasians genetically,they are more related to the Africans(Ainus typical haplogroup D,which is closely linked to the modern Africans( DE and E).While the physical anthropologists often grouped the Ainus together with some south pacific islanders.

We all descend from Africans. The Ainu descend from some of the earliest humans to leave Africa, around 50,000 years ago. The first wave of modern humans to colonise Europe only did so 40,000 years ago, and a lot of the modern genes didn't leave the Middle East until 10,000 to 3,000 years ago.

There is no proof whether the haplogroup O was from south China or Southeast Asian,but one thing for sure is, it has formed the majority of East and Southeast Asian populations today.Among the eastAsians,Han Chinese haplogroup O is over 60% on the average(higher in South Chinese than North Chinese),Koreans 80%+,the Japanese got the least (50%+).

Ultimately haplogroup O arose in Central Asia during the Ice Age, just like the Eurasian haplogroups R1a and R1b. There are still O* people among the modern Tajiks, Crimean Tatars, Uzbeks, Kazakhs and Uyghurs. The other subclades developed after the migration to East Asia. I can imagine that haplogroup O around around Tajikistan around 35,000 years ago, just before East Asia was recolonised from Central Asia.