The following data shows the changes in the 18-year-old population in Japan between 1955 and 2016.
Figure: Changes in the 18-year-old Population in Japan, 1955-2016
| Year | 18-year-old Population |
| 1955 | 1,682,239 |
| 1956 | 1,746,709 |
| 1957 | 1,531,488 |
| 1958 | 1,663,184 |
| 1959 | 1,871,682 |
| 1960 | 1,997,931 |
| 1961 | 1,895,967 |
| 1962 | 1,974,872 |
| 1963 | 1,770,483 |
| 1964 | 1,401,646 |
| 1965 | 1,947,657 |
| 1966 | 2,491,231 |
| 1967 | 2,426,802 |
| 1968 | 2,359,558 |
| 1969 | 2,133,508 |
| 1970 | 1,947,237 |
| 1971 | 1,846,787 |
| 1972 | 1,737,458 |
| 1973 | 1,667,064 |
| 1974 | 1,621,728 |
| 1975 | 1,561,360 |
| 1976 | 1,542,904 |
| 1977 | 1,623,574 |
| 1978 | 1,580,495 |
| 1979 | 1,563,868 |
| 1980 | 1,579,953 |
| 1981 | 1,607,183 |
| 1982 | 1,635,460 |
| 1983 | 1,723,025 |
| 1984 | 1,677,764 |
| 1985 | 1,556,578 |
| 1986 | 1,850,694 |
| 1987 | 1,882,768 |
| 1988 | 1,882,034 |
| 1989 | 1,933,616 |
| 1990 | 2,005,425 |
| 1991 | 2,044,923 |
| 1992 | 2,049,471 |
| 1993 | 1,981,503 |
| 1994 | 1,860,300 |
| 1995 | 1,773,712 |
| 1996 | 1,732,437 |
| 1997 | 1,680,006 |
| 1998 | 1,622,198 |
| 1999 | 1,545,270 |
| 2000 | 1,510,994 |
| 2001 | 1,511,845 |
| 2002 | 1,502,711 |
| 2003 | 1,464,800 |
| 2004 | 1,410,679 |
| 2005 | 1,365,804 |
| 2006 | 1,325,722 |
| 2007 | 1,299,571 |
| 2008 | 1,237,294 |
| 2009 | 1,212,499 |
| 2010 | 1,215,843 |
| 2011 | 1,201,934 |
| 2012 | 1,191,210 |
| 2013 | 1,231,117 |
| 2014 | 1,180,838 |
| 2015 | 1,199,977 |
| 2016 | 1,190,262 |
Source is Ministry of Education, Culture, Sports, Science and Technology.
学校基本調査 年次統計
www.e-stat.go.jp/SG1/estat/List.do?bid=000001015843&cycode=0
www.e-stat.go.jp/SG1/estat/Xlsdl.do?sinfid=000018434812
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