Historic population of Japan (1920-2010) from census results for 1920, 1930, 1940, 1945, 1950, 1955, 1960, 1965, 1970, 1975, 1980, 1985, 1990, 1995, 2000, 2005, 2010. Population projection (2011-2060) from National Institute of Population and Social Security Research (IPSS) "Population Projections for Japan" (January 2012), based on a medium-fertility assumption, where the age of marriage and the proportion of those who never marry increases while the total fertility rate decreases to 1.35 in 2060.