haplogroup Y is otherwise found mainly among Nivkhs , and with lower frequency among Tungusic peoples , Koreans , Mongols (including Kalmyks and Buryats ), Chinese , Japanese, Central Asians , South Siberian Turkic peoples (e.g. Tuvans , Todjins , Soyots ), Koryaks , Alyutors , Itelmens , Taiwanese aborigines ,