Y-chromosomal Adam is the partilineal common ancestor. Y-chromosomal Adam Lived in Aﬁca 70,000 - 140,000 years ago.
We are kowing the story of the journey ; how our ancestors migrated from Africa to populate the Earth.
Our ansestors moved across the Red Sea and reached the Persian Gulf(Figure 1). At that time Persian Gulf was ﬂoodplain. We think that the ﬁoodplain was the a gaden in the east, in Eden.
Bible says that a river wartering the garden ﬂowed from Eden; from there it was separated into four headwaters (Four headwaters are Pishon, Gihon, Tigris and Euphrates.) Sciense says that the ﬂoodplain now below the Gulf would have been about the size of Great Briten.
Adam lived in the garden of Eden which is now Pericain Gulf as Bible says. In the ﬁeld of human genetics, he is called CT(Y-chromosome DNA Haplogroup).
Now we know about Japanese story and Japanese ansestors in human genetics.