grew by 17 percent 9 million people peak around 38.5 million grew by 17 percent home to 13.5 million people 13,2 milhões de habitantes peak around 38.5 million population of 38 million larger than New York and Los Angeles combined home to 13.5 million people densely populated population of 38 million 38 million home to 13.5 million people population of 38 million peak around 38.5 million Tokyo