data japan 2023Japan Data. Japan’s Fiscal 2025 Budget Reaches Record Hh of ¥114.4 Trillion Economy Politics Society Jan 13, 2025. With social security costs continuing to balloon due to an aging populationIn 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