Tokyo Population 2024 Forecast. Tokyo is the only prefecture whose population is projected to grow from 2020, increasing 2.5 percent to 14.40 million. The current population of japan is 123,558,553 as of friday, october 18, 2024, based on worldometer's elaboration of the latest united nations data 1.;
Tokyo’s 2024 population is now estimated at37,115,000. United nations population projections are also included through the year 2035.