 It has been found with generally lower frequency in samples from Oceania, mainland Southeast Asia, Southwest China, Northwest China, North China, Northeast China, Korea, Japan, North Asia, and Central Asia.A 2008 study by Li suggested that the admixture analyses of Tai–Kadai-speaking populations showed a significant genetic influence in a large proportion of Indonesians.Most of the population samples contained a high frequency of haplogroup O-M119 .