Ministry of Internal Affairs and Communications monitors the price of chicken monthly.
The data below show the changes in the price indexes of chicken between 1970 and 2014, if the price in 2010 is taken as 100. The price is getting higher slowly for more than two decades.
| Year | Index (2010 = 100) | Price of 100g chicken (yen) |
| 1970 | 53.5 | 69 |
| 1971 | 55.5 | 72 |
| 1972 | 56.5 | 73 |
| 1973 | 62.6 | 81 |
| 1974 | 77.5 | 100 |
| 1975 | 83 | 107 |
| 1976 | 91.8 | 118 |
| 1977 | 92.2 | 119 |
| 1978 | 88.3 | 114 |
| 1979 | 85.7 | 111 |
| 1980 | 86.7 | 112 |
| 1981 | 90.7 | 117 |
| 1982 | 90.7 | 117 |
| 1983 | 90.4 | 117 |
| 1984 | 90.1 | 116 |
| 1985 | 88.5 | 114 |
| 1986 | 86.8 | 112 |
| 1987 | 83.9 | 108 |
| 1988 | 81.4 | 105 |
| 1989 | 81 | 104 |
| 1990 | 82.3 | 106 |
| 1991 | 83.7 | 108 |
| 1992 | 84.6 | 109 |
| 1993 | 84.5 | 109 |
| 1994 | 83.4 | 108 |
| 1995 | 82.3 | 106 |
| 1996 | 83.3 | 107 |
| 1997 | 86.1 | 111 |
| 1998 | 87.2 | 112 |
| 1999 | 87.7 | 113 |
| 2000 | 86.7 | 112 |
| 2001 | 87.5 | 113 |
| 2002 | 92.3 | 119 |
| 2003 | 92.3 | 119 |
| 2004 | 92 | 119 |
| 2005 | 92.7 | 120 |
| 2006 | 93 | 120 |
| 2007 | 93.9 | 121 |
| 2008 | 102.7 | 132 |
| 2009 | 101.2 | 131 |
| 2010 | 100 | 129 |
| 2011 | 100.6 | 130 |
| 2012 | 98.5 | 127 |
| 2013 | 97 | 125 |
| 2014 | 104.6 | 135 |
The next graph shows the changes in 100g chicken 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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