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The DNA sequence SNP study done by Japanese researchers in 2005 (the biggest contributor of DNA of each East Asian people is bolded) showed the following results:
Korean DNA sequence is made up of:
40.6% Uniquely Korean
21.9% Chinese
1.6% Ainu
17.4% Okinawan
18.5% Unidentified
Japanese DNA sequence is made up of:
4.8% Uniquely Japanese
24.2% Korean
25.8% Chinese
8.1% Ainu
16.1% Okinawan
21% Unidentified
Chinese DNA sequence is made up of:
60.6% Uniquely Chinese
1.5% Japanese
10.6% Korean
1.5% Ainu
10.6% Okinawan
15.2% Unidentified
The biggest components in Japanese are Chinese, Korean, Okinawan.
A closer look at the Chinese gene pool
The shared Chinese gene pool between Japanese and Koreans is thought to be formed of Dong-Yi stock (originating from China’s Shandong peninsula) that later formed the Puyo peoples of the Paekche kingdom and Koguyro kingdoms of the Korean peninsula.
mtDNA haplogroup A which is widespread in Asia today occurs at levels below 10%, but reaches higher concentrations in some parts of China, Korea and Japan.
“Some ethnic Chinese populations, such as the Dong and the Yi, carry haplogroup A at levels as high as 30%. One branch of the haplogroup, A4, reaches levels of more than 15% among mitochondrial DNA samples collected in the city of Wuhan in central China. In the Spittoon… Ancient China’s famous Terracotta Army was constructed by men bearing haplogroup A. Check the Spittoon to learn more about these ancient builders.” — Source: An Introduction to Haplogroups: An Interactive Activity Activity developed by Meredith T. Knight at Tufts University
Ancient mtDNA in Siberia Haplogroup A was widespread in Siberia in ancient times. One study of skeletal remains discovered near Siberia's Lake Baikal estimated the haplogroup was present in 13-26% of the region's population 7,000 years ago, and is almost exclusively among the Chukchi and the Yupik, two small indigenous groups from northeastern Siberia.
M7, a widespread haplogroup found in China, Japan, Southeast Asia and the Pacific Islands. [M8, a widespread haplogroup in central and eastern Asia that eventually sent an offshoot to the Americas. M9, which appears to have arisen in Tibet.] While Haplogroup M is widespread throughout South and East Asia, it originates from the Indian sub-continent where it is more diverse on there than anywhere else in the world.
Overall, Japanese are closest to Tibetans and Han Chinese, but only marginally more so than to the Koreans.
The Ainu who are widely considered to be of the “old” proto-Mongoloid stock closely related to the Tibetan Buryat and Yakut peoples, and descended from the Jomon people who lived in the Tohoku area until they were later pushed northwards into Hokkaido, afterwhich they resided around the Sea of Okhotsk, mainly Hokkaido, Sakhalin, Kuril Islands and the tip of Kamchatka. However, the DNA sequences show that Ainu are actually more remotely distanced from the Jomon than is commonly believed, as they were influenced by Siberians (as with Koreans). Evidence is the haplogroup C3 (no subclade) occurs at moderately high frequencies among these populations.
Korean DNA sequence is made up of:
40.6% Uniquely Korean
21.9% Chinese
1.6% Ainu
17.4% Okinawan
18.5% Unidentified
Japanese DNA sequence is made up of:
4.8% Uniquely Japanese
24.2% Korean
25.8% Chinese
8.1% Ainu
16.1% Okinawan
21% Unidentified
Chinese DNA sequence is made up of:
60.6% Uniquely Chinese
1.5% Japanese
10.6% Korean
1.5% Ainu
10.6% Okinawan
15.2% Unidentified
The biggest components in Japanese are Chinese, Korean, Okinawan.
A closer look at the Chinese gene pool
The shared Chinese gene pool between Japanese and Koreans is thought to be formed of Dong-Yi stock (originating from China’s Shandong peninsula) that later formed the Puyo peoples of the Paekche kingdom and Koguyro kingdoms of the Korean peninsula.
mtDNA haplogroup A which is widespread in Asia today occurs at levels below 10%, but reaches higher concentrations in some parts of China, Korea and Japan.
“Some ethnic Chinese populations, such as the Dong and the Yi, carry haplogroup A at levels as high as 30%. One branch of the haplogroup, A4, reaches levels of more than 15% among mitochondrial DNA samples collected in the city of Wuhan in central China. In the Spittoon… Ancient China’s famous Terracotta Army was constructed by men bearing haplogroup A. Check the Spittoon to learn more about these ancient builders.” — Source: An Introduction to Haplogroups: An Interactive Activity Activity developed by Meredith T. Knight at Tufts University
Ancient mtDNA in Siberia Haplogroup A was widespread in Siberia in ancient times. One study of skeletal remains discovered near Siberia's Lake Baikal estimated the haplogroup was present in 13-26% of the region's population 7,000 years ago, and is almost exclusively among the Chukchi and the Yupik, two small indigenous groups from northeastern Siberia.
M7, a widespread haplogroup found in China, Japan, Southeast Asia and the Pacific Islands. [M8, a widespread haplogroup in central and eastern Asia that eventually sent an offshoot to the Americas. M9, which appears to have arisen in Tibet.] While Haplogroup M is widespread throughout South and East Asia, it originates from the Indian sub-continent where it is more diverse on there than anywhere else in the world.
Overall, Japanese are closest to Tibetans and Han Chinese, but only marginally more so than to the Koreans.
The Ainu who are widely considered to be of the “old” proto-Mongoloid stock closely related to the Tibetan Buryat and Yakut peoples, and descended from the Jomon people who lived in the Tohoku area until they were later pushed northwards into Hokkaido, afterwhich they resided around the Sea of Okhotsk, mainly Hokkaido, Sakhalin, Kuril Islands and the tip of Kamchatka. However, the DNA sequences show that Ainu are actually more remotely distanced from the Jomon than is commonly believed, as they were influenced by Siberians (as with Koreans). Evidence is the haplogroup C3 (no subclade) occurs at moderately high frequencies among these populations.