Castella (Kasutera) is a Japanese sponge cake made of sugar, flour, eggs, and starch syrup. Its origin is in Iberian Peninsula.
Japanese government monitors the price of Kasutera every month.
The following data show the changes in the price indexes of Kasutera between 1970 and 2014, if the price in 2010 is taken as 100.
| Year | Index (2010 = 100) | Price of 100g Kasutera (yen) |
| 1970 | 28.7 | 62 |
| 1971 | 30.9 | 67 |
| 1972 | 32.3 | 70 |
| 1973 | 36.1 | 78 |
| 1974 | 47.8 | 103 |
| 1975 | 54.8 | 118 |
| 1976 | 57.9 | 125 |
| 1977 | 61.3 | 132 |
| 1978 | 62.2 | 134 |
| 1979 | 62.3 | 135 |
| 1980 | 66.8 | 144 |
| 1981 | 71.8 | 155 |
| 1982 | 74.9 | 162 |
| 1983 | 76.1 | 164 |
| 1984 | 76.6 | 165 |
| 1985 | 77.1 | 167 |
| 1986 | 77.5 | 167 |
| 1987 | 78.1 | 169 |
| 1988 | 79.0 | 171 |
| 1989 | 81.6 | 176 |
| 1990 | 83.2 | 180 |
| 1991 | 87.0 | 188 |
| 1992 | 90.2 | 195 |
| 1993 | 92.0 | 199 |
| 1994 | 93.1 | 201 |
| 1995 | 93.4 | 202 |
| 1996 | 94.0 | 203 |
| 1997 | 95.4 | 206 |
| 1998 | 96.3 | 208 |
| 1999 | 97.3 | 210 |
| 2000 | 97.0 | 210 |
| 2001 | 96.0 | 207 |
| 2002 | 95.6 | 206 |
| 2003 | 95.1 | 205 |
| 2004 | 94.2 | 203 |
| 2005 | 93.7 | 202 |
| 2006 | 95.0 | 205 |
| 2007 | 98.3 | 212 |
| 2008 | 100.7 | 218 |
| 2009 | 103.2 | 223 |
| 2010 | 100.0 | 216 |
| 2011 | 98.9 | 214 |
| 2012 | 99.5 | 215 |
| 2013 | 100.3 | 217 |
| 2014 | 101.9 | 220 |
The next data show the changes in 100g Kasutera 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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