data japan 202319-1 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8668 Japan ©1996 Statistics Bureau, Ministry of Internal Affairs and Communications (JCN2000012020001)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