Which city has more people Tokyo London Melbourne sydney?

The city with the most people out of the four listed is Tokyo. Tokyo is the capital city of Japan and one of the most populated metropolitan areas in the world, with a population of over 13 million people. London is the capital city of England and the United Kingdom, with a population of over 8 million people. Melbourne is the capital city of the Australian state of Victoria and has a population of over 4 million people. Sydney is the capital city of the Australian state of New South Wales and has a population of over 5 million people.