Japanese government monitors the price of salt every month.
The following data show the changes in the price indexes of salt between 1970 and 2014, if the price in 2010 is taken as 100.
Until 1997, salt was one of the product of the government monopoly.
| Year | Index (2010 = 100) | Price of 1kg salt (yen) |
| 1970 | 27.7 | 30 |
| 1971 | 27.7 | 30 |
| 1972 | 27.7 | 30 |
| 1973 | 27.7 | 30 |
| 1974 | 27.7 | 30 |
| 1975 | 27.7 | 30 |
| 1976 | 43.8 | 48 |
| 1977 | 54.9 | 60 |
| 1978 | 54.7 | 60 |
| 1979 | 54.6 | 60 |
| 1980 | 54.6 | 60 |
| 1981 | 63.7 | 70 |
| 1982 | 68.3 | 75 |
| 1983 | 68.3 | 75 |
| 1984 | 68.3 | 75 |
| 1985 | 68.3 | 75 |
| 1986 | 68.3 | 75 |
| 1987 | 68.3 | 75 |
| 1988 | 68.3 | 75 |
| 1989 | 69.6 | 77 |
| 1990 | 70.0 | 77 |
| 1991 | 70.0 | 77 |
| 1992 | 87.4 | 96 |
| 1993 | 99.9 | 110 |
| 1994 | 99.9 | 110 |
| 1995 | 99.9 | 110 |
| 1996 | 99.9 | 110 |
| 1997 | 101.3 | 111 |
| 1998 | 101.7 | 112 |
| 1999 | 101.7 | 112 |
| 2000 | 101.9 | 112 |
| 2001 | 101.9 | 112 |
| 2002 | 101.8 | 112 |
| 2003 | 101.7 | 112 |
| 2004 | 101.7 | 112 |
| 2005 | 101.5 | 112 |
| 2006 | 101.3 | 111 |
| 2007 | 101.2 | 111 |
| 2008 | 100.9 | 111 |
| 2009 | 100.3 | 110 |
| 2010 | 100.0 | 110 |
| 2011 | 99.6 | 110 |
| 2012 | 99.5 | 109 |
| 2013 | 99.1 | 109 |
| 2014 | 100.2 | 110 |
The next data show the changes in 1kg salt price from 1970 to 2014.
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=000011288549
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