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 byWelcome to Spectral Database for Organic Compounds, SDBS. This is a free site organized by National Institute of Advanced Industrial Science and Technology (AIST), Japan.