The O-M175 haplogroup is very common amongst males from China, Korea, and Southeast Asia. It has two primary branches: O1 (O-F265) and O2 (O-M122). O1 is found at high frequencies amongst males native to Southeast Asia, Taiwan, Japan, the Korean Peninsula, Madagascar and some populations in southern China and Austroasiatic speakers of India. It is also high in the Melanesian populations of the Solomon Islands, Fiji, and the Moluccas, and shows significant frequencies in some populations of Papua New Guinea. O2 is found at high levels amongst Han Chinese, Tibeto-Burman populations (including many of those in Yunnan, Tibet, Burma, Northeast India, and Nepal), Manchu, Mongolians, Koreans, Vietnamese, Malays, Filipinos, Thais, Polynesians, the Naiman tribe of Kazakhs in Kazakhstan, Kazakhs in the southeast of Altai Republic, and Kazakhs in the Ili area of Xinjiang.