London has overtaken New York to be ranked first in the Global Power City Index (GPCI) after significantly raising its scores for the various GPCI indicators on the occasion of the 2012 London Olympics. Tokyo, which is now ranked fourth, should take advantage of its hosting of the 2020 Olympic Games to make it the most attractive and competitive city in the world. Already suffering from a declining population and low economic growth, Japan cannot afford to deny the overconcentration of its population in Tokyo. Rather, it is necessary to adopt a policy to increase the global competitiveness of Tokyo and other large cities as much as possible in order to help Japan grow.