data japan 2023In 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 byMore about the OECD Data Explorer ↗️ · Platform and data status. logo. Find, understand and use the data you need. or browse by. Topic.