East Asia is the eastern subregion of the Asian continent, which can be defined in either geographical or ethno-cultural terms. Geographically and geopolitically, it includes China (including Hong Kong and Macau), Mongolia, North Korea, South Korea, Japan and Taiwan; it covers about , or about 28% of the Asian continent. GDP(PPP) of East Asia is 32.4 trillion while Nominal GDP is 19.1 trillion USD. 

East Asians comprise around /1e9 round 1 billion people. About 38% of the population of Asia and 22%, or over one fifth of world's population live in East Asia. Although the coastal and riparian areas of the region form one of the world's most populated places, the population in Mongolia and Western China, both landlocked areas, is very sparsely distributed, with Mongolia having the lowest population density of a sovereign state. The overall population density of the region is , about three times the world average of . 

Historically, societies in East Asia have been part of the Chinese cultural sphere, and East Asian vocabulary and scripts are often derived from Classical Chinese and Chinese script. Major religions include Buddhism (mostly Mahayana), Confucianism or Neo-Confucianism, Taoism, Chinese folk religion in China and Taiwan, Shinto in Japan, Korean shamanism in Korea. Shamanism is also prevalent among Mongolians and other indigenous populations of northern East Asia such as the Manchus and Ewenki. Islam is popular in Northwest China and Kazaks in Mongolia.The Chinese calendar is the root from which many other East Asian calendars are derived.
What is popular in northwest china?
 Islam is popular in Northwest China 