data japanStatements that can be derived from Japan's population data. Japan has a population of 123,753,041 people, as of July 1, 2025. Japan's population is equivalent to 1.55% of the totalSummary statistics; Region: 2015: Eastern Asia : Surface area (sq km) 2014: 377930: Data refer to 1 October 2007. Population (proj., 000) 2016: 126324 : Pop. density (per