Sardine and anchovy are common foods in Japan, and they are an item which is included in Comsumer Price Index calculation. Both are categolized into one item called "iwashi".
いわし
Ministry of Internal Affairs and Communications checks the prices of sardine every month. The following data shows the changes in the price indexes of sardine in Japan, 1970-2014.
| Year | Index (2010 = 100) | Price of 100g sardine (yen) |
| 1970 | 32.0 | 35 |
| 1971 | 33.4 | 37 |
| 1972 | 31.1 | 34 |
| 1973 | 29.2 | 32 |
| 1974 | 32.6 | 36 |
| 1975 | 30.3 | 33 |
| 1976 | 30.1 | 33 |
| 1977 | 32.9 | 36 |
| 1978 | 31.2 | 34 |
| 1979 | 31.8 | 35 |
| 1980 | 33.8 | 37 |
| 1981 | 36.7 | 40 |
| 1982 | 38.0 | 42 |
| 1983 | 40.9 | 45 |
| 1984 | 40.9 | 45 |
| 1985 | 42.4 | 47 |
| 1986 | 42.4 | 47 |
| 1987 | 43.4 | 48 |
| 1988 | 44.6 | 49 |
| 1989 | 45.7 | 50 |
| 1990 | 50.0 | 55 |
| 1991 | 57.8 | 64 |
| 1992 | 56.9 | 63 |
| 1993 | 56.5 | 62 |
| 1994 | 56.0 | 62 |
| 1995 | 64.6 | 71 |
| 1996 | 83.2 | 92 |
| 1997 | 86.6 | 95 |
| 1998 | 92.9 | 102 |
| 1999 | 86.2 | 95 |
| 2000 | 90.2 | 99 |
| 2001 | 96.9 | 107 |
| 2002 | 113.4 | 125 |
| 2003 | 113.3 | 125 |
| 2004 | 109.7 | 121 |
| 2005 | 112.7 | 124 |
| 2006 | 109.0 | 120 |
| 2007 | 101.9 | 112 |
| 2008 | 105.3 | 116 |
| 2009 | 99.9 | 110 |
| 2010 | 100.0 | 110 |
| 2011 | 92.9 | 102 |
| 2012 | 90.4 | 99 |
| 2013 | 89.9 | 99 |
| 2014 | 103.9 | 114 |
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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