Tokyo Japan Population 2025. As of october 1, 2022, the population of tokyo is estimated to be 14.041 million, or about 11.2% of japan's total population, and it has the largest population among all the 47. Tokyo, japan's capital and its most densely populated city, is also the world's largest metropolitan area, with roughly 37.4 million people calling its three prefectures home.

United nations projections are also included through the year 2100. The un estimates the july 1, 2025 population at 123,753,041.