data japanFission yield data from JENDL-4.0 Fission Yield Data were added for fission products in Tables of Nuclear Data. (February 8, 2011) The 2010 edition of WWW Chart of Nuclides and Tables ofStatements 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 total