Mackerel is a common food in Japan. We call them "saba".
さば
Japanese government checks the mackerel price in the market monthly. The government calculates the Consumer Price Indexes based on that research.
The following data show the changes in the price indexes of mackerel since 1970, if the price in 2010 is taken as 100.
| Year | Index (2010 = 100) | Price of 100g mackerel (yen) |
| 1970 | 15.8 | 16 |
| 1971 | 17.3 | 18 |
| 1972 | 17.7 | 18 |
| 1973 | 21.2 | 22 |
| 1974 | 26.8 | 28 |
| 1975 | 28.1 | 29 |
| 1976 | 35.1 | 37 |
| 1977 | 39.3 | 41 |
| 1978 | 37.0 | 38 |
| 1979 | 39.3 | 41 |
| 1980 | 42.7 | 44 |
| 1981 | 47.2 | 49 |
| 1982 | 60.4 | 63 |
| 1983 | 62.3 | 65 |
| 1984 | 64.2 | 67 |
| 1985 | 65.4 | 68 |
| 1986 | 67.0 | 70 |
| 1987 | 68.8 | 72 |
| 1988 | 70.5 | 73 |
| 1989 | 67.1 | 70 |
| 1990 | 74.8 | 78 |
| 1991 | 97.9 | 102 |
| 1992 | 101.8 | 106 |
| 1993 | 99.8 | 104 |
| 1994 | 86.9 | 90 |
| 1995 | 89.7 | 93 |
| 1996 | 94.7 | 98 |
| 1997 | 101.0 | 105 |
| 1998 | 98.7 | 103 |
| 1999 | 96.2 | 100 |
| 2000 | 99.3 | 103 |
| 2001 | 104.2 | 108 |
| 2002 | 101.9 | 106 |
| 2003 | 105.9 | 110 |
| 2004 | 103.0 | 107 |
| 2005 | 101.5 | 106 |
| 2006 | 100.2 | 104 |
| 2007 | 98.3 | 102 |
| 2008 | 104.6 | 109 |
| 2009 | 99.7 | 104 |
| 2010 | 100.0 | 104 |
| 2011 | 101.9 | 106 |
| 2012 | 96.1 | 100 |
| 2013 | 95.9 | 100 |
| 2014 | 105.8 | 110 |
The next figure shows the changes in 100g mackerel price between 1970 and 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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