Northeast Asia is a region in East Asia that includes countries such as China, Japan, South Korea, North Korea, and Mongolia. It is known for its rich history, diverse cultures, and significant economic development. Major cities like Beijing, Tokyo, and Seoul are key centers of trade and innovation. The region is characterized by a variety of landscapes, from the mountains of Mongolia to the coastal areas of Japan. Northeast Asia also plays a crucial role in global politics and economics, with strong ties to international organizations and trade agreements.