From 2015 to 2020, the population of Japan decreased by 949 thousand people 
The population of Japan from 2015 to 2020 decreased by almost a million people. This became known from the results of the population census presented by the Ministry of Administrative Affairs and Communications of Japan.
As of October 2020, the population of Japan was 126.14 million people. This is 949 thousand less than in 2015. The working-age population aged 15 to 64 has declined by three percent (to 75 million). The number of children under the age of 14 has decreased to 15 million (by six percent) in five years.
In Japan, the average family size has decreased. By October 2020, the average number of people in a family had dropped to 2.27. This is the lowest rate since 1970.
In addition, Japan is projected to age rapidly. By 2065, the country will be home to 88 million people. Of these, 38 percent will be people over 60 years old.