 O1b1a1-PK4 is found among some (mostly tribal) populations of South and Southeast Asia, as well as among the Japanese of Japan, the Balinese of Indonesia and Southern China.O1b1a2-PAGE59 is relatively rare and mainly distributed in East Asia, especially in Han Chinese.Another subclade, Haplogroup O1b2-M176 (formerly O2b), is found almost exclusively among the Japanese, Koreans, and some Manchurians.