data japan 2023Data for China, Japan from The World Bank: Data. Free and open access to global development data. Free and open access to global development data. Data. HOME. ... (2025 trillion) Trend.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