D2 only exists in Japan, and the original D2 carriers were Paleo-Mongoloid.The Yayoi people, coming later from the region of Korea, carrying Y-DNA O and C were mostly Tungids with some Sinid types amongst them.Observations made by Matsuura Takeshiro, for example, illustrate concretely the dramatic decline of Ainu populations caused by epidemic diseases.
After losing several battles, the Ainu people were enslaved. "Circumpolar Religion and Ecology: An Anthropology of the North Takashi Irimoto, Takako Yamada - 1994
The whole thing has been updated, and much has been added.
3/2013: Well, my absence ended up being much longer than anticipated.
He does an amazing job at setting the scene for the background of the siege and battle.
His attention to detail on Caesar's officers and men is impeccable.