Where Japanese came from?

 We know that human's origin is Africa but the progress of our Japanese racial migration has not been cleared until we acquire the way of analysis utilizing Gene analysis method. And excavation of archaeological sites made remarkable progress at an accelerating rate recently.

By the way do you know the oldest country in the world? Yes, it is Japan and the second one is Danish and the 3ird is England, based on the definition that the the starting point of the country is the time the nation was formed and unified as a country. 

So, you must have realized a critical white lie by PRC, as they have only 70 years history as an independent Nation. Often said by them, 4,000 years of history is just an imagination based on their selfish and distorted idea. In addition, Korea has 2 years longer history than PRC.

As the first visitor, Tungusic came from Northern direction on foot because main land, Sakhalin and Hokkaido with Japan mainland had been connected as a peninsula being separated from the Korean Peninsula,no cooperation as the earth. 

Consequently, emigration from Korea is denied academically, the fairy tale is just only an imagination that the technology of Paddy rice cultivation had been brought by Korean people from the Peninsula, just impossible Genetically.

 D1b of Mitochondria on the Y chromosome is owned only by Japanese race for all Hokkaido to Okinawa, without doubt Japanese race were formed by mixing Tungusic from North and Austronesian from South, no history with Continent from Western direction at all.

Judging from another direction on this point, AT virus is observed in all the Japan land, much is in Southern Kyushu to Okinawa, but not in Continent and Korean at all. AT vilus is much prevailing among Tungusic and Austronesian people.

To summarize the above, Japanese race is formed only by mixture with Tugusic and Austronesian without any relation with Continent and Korean Peninsula.

Paddy farming is not a traditional one, but an ancient one in old Japan land.