What is the largest urban area in Asia?

The largest urban area in Asia is the Tokyo metropolitan area in Japan. According to the United Nations World Urbanization Prospects report in 2018, the Tokyo metropolitan area had a population of 37 million people, making it the world's most populated metropolitan area. It encompasses the city of Tokyo as well as many neighboring cities, towns, and villages. The area is notable for its high population density, advanced infrastructure, and significant economic activity.