<P> A 2016 United Nations estimate puts the total population at 38,000,000 . It covers an area of approximately 13,500 km ( 5,200 mi ) , giving it a population density of 2,642 person / km . It is the second largest single metropolitan area in the world in terms of built - up or urban function landmass at 8,547 km ( 3,300 mi ) , behind only New York City at 11,642 km ( 4,495 mi ) . </P>
what is the population of tokyo metropolitan area
2016 United Nations estimate puts the total population at 38,000,000