The continent that houses the most populous city, **Tokyo**, is **Asia**. Tokyo, capital of **Japan**, is one of the largest metropolitan areas in the world, with a population exceeding 37 million in the greater Tokyo area. The city is known for its modern architecture, bustling streets, and vibrant culture. It serves as a major economic hub, influencing global finance, trade, and technology. Tokyo's unique blend of traditional and contemporary elements makes it a fascinating destination for tourists and residents alike.