Ministry of Internal Affairs and Communications monitors the price of panties monthly.
The data below show the changes in the price indexes of panties between 1970 and 2015, if the price in 2015 is taken as 100.
| Year | Index (2015 = 100) | Price of panties (yen) |
| 1970 | 39.8 | 174 |
| 1971 | 40.0 | 175 |
| 1972 | 41.0 | 179 |
| 1973 | 46.5 | 203 |
| 1974 | 58.8 | 257 |
| 1975 | 59.2 | 259 |
| 1976 | 60.0 | 262 |
| 1977 | 62.3 | 272 |
| 1978 | 62.9 | 275 |
| 1979 | 62.9 | 275 |
| 1980 | 64.6 | 282 |
| 1981 | 67.1 | 293 |
| 1982 | 67.2 | 294 |
| 1983 | 67.3 | 294 |
| 1984 | 67.6 | 295 |
| 1985 | 68.1 | 298 |
| 1986 | 68.0 | 297 |
| 1987 | 68.0 | 297 |
| 1988 | 68.1 | 298 |
| 1989 | 69.6 | 304 |
| 1990 | 70.7 | 309 |
| 1991 | 72.6 | 317 |
| 1992 | 77.5 | 339 |
| 1993 | 77.8 | 340 |
| 1994 | 78.5 | 343 |
| 1995 | 79.1 | 346 |
| 1996 | 80.4 | 351 |
| 1997 | 82.9 | 362 |
| 1998 | 83.9 | 367 |
| 1999 | 85.0 | 371 |
| 2000 | 85.9 | 375 |
| 2001 | 85.9 | 375 |
| 2002 | 86.4 | 378 |
| 2003 | 86.5 | 378 |
| 2004 | 86.9 | 380 |
| 2005 | 88.3 | 386 |
| 2006 | 88.3 | 386 |
| 2007 | 89.2 | 390 |
| 2008 | 89.3 | 390 |
| 2009 | 89.4 | 391 |
| 2010 | 88.7 | 388 |
| 2011 | 90.1 | 394 |
| 2012 | 88.9 | 388 |
| 2013 | 90.1 | 394 |
| 2014 | 95.6 | 418 |
| 2015 | 100.0 | 437 |
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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