Northeast Asia
Often used interchangeably with the term 'East Asia,' Northeast Asia is, as its name implies, in the geographic northeast region of Asia. Being a geographic, rather than a cultural term--as opposed to East Asia, which has varying definitions, some being cultural--Northeast Asia definitively includes the countries of: Mongolia, the People's Republic of China, North Korea, South Korea, and Japan. Oftentimes, eastern Siberia and especially Taiwan are also included as being in Northeast Asia.