data japan 2023Population Pyramids: Japan - 2025. Other indicators visualized on maps: (In English only, for now) AIDS estimated deaths (UNAIDS estimates)In Japan, the current population is 124,370,947 as of 2025 with a projected decrease of 15% to 105,123,167 by 2050. −0.5% +0.041 percentage points change since 2022. Population by