Following text is one quoted from a news of genetic research, translated by myself.
縄文・弥生人の「混血」 遺伝子解析で裏付け ：日本経済新聞
縄文・弥生人の「混血」 遺伝子解析で裏付け
総合研究大学院大など発表 2012/11/1 0:38 記事保存
日本列島の先住民である縄文人と、朝鮮半島から渡ってきた弥生人とが混血を繰り返して現在の日本人になったとする「混血説」を裏付ける遺伝子解析の結果を、総合研究大学院大（神奈川県）などのチームがまとめ、日本人類遺伝学会が編集する１日付の国際専門誌電子版に発表した。
これまでも同様の研究結果はあったが、今回は１人当たり最大約90万カ所のＤＮＡ変異を解析し、結果の信頼性は非常に高いとしている。
チームはこれまで公開されている本土出身者（主に関東居住者）、中国人、欧米人など約460人分のＤＮＡデータに、アイヌ民族と沖縄出身者の計71人分を新たに加えて解析した。その結果、アイヌ民族と遺伝的に最も近いのは沖縄出身者で、次が本土出身者と判明した。本土出身者は韓国人とも近かった。
この結果は、日本人全般が縄文人の遺伝子を受け継いでいる一方、本土出身者は弥生人との混血の度合いが大きく、混血しながら北海道や沖縄方面に広がっていったと解釈できるという。
日本人の起源は縄文人がそのまま各地の環境に適応した「変形説」、縄文人を弥生人が追い出して定着した「人種置換説」も知られているが、総研大の斎藤成也教授（遺伝学）は「研究結果は混血説のシナリオに一致した」と説明している。
チームは今後、縄文遺跡で見つかる人骨のＤＮＡを分析するなどし、日本人のルーツの解明を進める。〔共同〕
Certified to be valid by genetic analysis, mixing blood of Jomon and Yayoi People, published by The Graduate University for Advanced Studies and others.
Result of the genetic analysis that is validating a theory uttering that Jomon people preceded in Japan, and Yayoi people came from the Korean peninsula across the sea, are seen to repeat mixing in blood, ended up with recent Japanese.
Which is concluded in a team composed of the Graduate University for Advanced Studies(in Kanagawa prefecture) or others, published on online magazine of international experts on November 1(2012).
While similar researches preceded were observed until this time report, for analyzing 0.1 million points of DNA mutation, consequence of the research is concluded to be much credible.
The team practiced the analysis by data from mainlander(mostly residents in east Japan), Chinese, European, about 460 people of DNA plus, adding 71 people's data those come from Ainu tribe and from Okinawa.
In the upshot, people those who have most similar gene with Ainu people are ones from Okinawa. nextly mainlanders.
Mainlanders also have gene close to Korean people.
They say that this result is indicating all the Japanese to be descended from Jomon gene, on the other hand, it is much obvious in mainlanders for mixing up trend with Yayoi people, considerably, they were eventually spreading into Hokkaido or Okinawa while commingling.
As for theories of origin of Japanese, there are known ones like "forming" as Jomon people just stayed and accustomed to where they were indigenous, or "replacement" as Jomon people were getting stable by expelling Yayoi people out, professor Naruya Saito in the university(in genetics) explains about the result to be "matched to a mixing up blood scenario".
The team is supposed to get their study to figure out Japanese origin further by analysing DNA of bones those would be found in Jomon ruin.