The most populous city of Asia is:

The most populous city of Asia, and indeed the world, is Tokyo. The capital of Japan, Tokyo is renowned for its vast metropolitan area, known as the Greater Tokyo Area, which encompasses the city proper and numerous surrounding prefectures. This expansive urban agglomeration consistently holds the top position globally in terms of population, making it a massive hub of economic, cultural, and political activity. Its dense population is a result of historical growth, economic opportunities, and efficient infrastructure.

• New Delhi, the capital of India, is a highly populous city, but its metropolitan area does not surpass Tokyo's in terms of total population.
• Shanghai, a major financial center in China, is also an incredibly populous city, but its metropolitan population is generally considered smaller than that of the Greater Tokyo Area.
• Beijing, the capital of China, is another massive city, but like Shanghai and New Delhi, its metropolitan area population is less than Tokyo's.