Ministry of Internal Affairs and Communications monitors the price of men's summer suits monthly.
The data below show the changes in the price indexes of men's summer suits between 1970 and 2015, if the price in 2010 is taken as 100.
| Year | Index (2010 = 100) | Price of men's summer suits (yen) |
| 1970 | 39.4 | 7,312 |
| 1971 | 44.6 | 8,277 |
| 1972 | 47.9 | 8,889 |
| 1973 | 55.5 | 10,300 |
| 1974 | 69.3 | 12,861 |
| 1975 | 74.9 | 13,900 |
| 1976 | 82.3 | 15,273 |
| 1977 | 87.7 | 16,275 |
| 1978 | 87.5 | 16,238 |
| 1979 | 88.8 | 16,480 |
| 1980 | 95.1 | 17,649 |
| 1981 | 96.8 | 17,964 |
| 1982 | 98.2 | 18,224 |
| 1983 | 101.1 | 18,762 |
| 1984 | 101.3 | 18,799 |
| 1985 | 104.3 | 19,356 |
| 1986 | 105.2 | 19,523 |
| 1987 | 106.6 | 19,783 |
| 1988 | 107.4 | 19,931 |
| 1989 | 111.4 | 20,674 |
| 1990 | 115.4 | 21,416 |
| 1991 | 117.5 | 21,806 |
| 1992 | 118.1 | 21,917 |
| 1993 | 115.5 | 21,434 |
| 1994 | 110.1 | 20,432 |
| 1995 | 104.9 | 19,467 |
| 1996 | 104.4 | 19,375 |
| 1997 | 109.6 | 20,340 |
| 1998 | 112.5 | 20,878 |
| 1999 | 108.9 | 20,210 |
| 2000 | 105.4 | 19,560 |
| 2001 | 103.1 | 19,133 |
| 2002 | 99.3 | 18,428 |
| 2003 | 96.8 | 17,964 |
| 2004 | 96.9 | 17,983 |
| 2005 | 97.8 | 18,150 |
| 2006 | 98.2 | 18,224 |
| 2007 | 99.0 | 18,372 |
| 2008 | 99.1 | 18,391 |
| 2009 | 98.6 | 18,298 |
| 2010 | 100.0 | 18,558 |
| 2011 | 107.8 | 20,006 |
| 2012 | 111.3 | 20,655 |
| 2013 | 113.3 | 21,026 |
| 2014 | 122.5 | 22,734 |
| 2015 | 122.2 | 22,678 |
The next graph shows the changes in the men's summer suits price from 1970 to 2015.
Source is Statistics Bureau. 消費者物価指数 (CPI) 結果
www.stat.go.jp/data/cpi/historic.htm
www.e-stat.go.jp/SG1/estat/Csvdl.do?sinfid=000011288551
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