Cost of Living and Price Reports from Tokyo, Japan. You can download the Excel list of items+prices I posted.

English translation of the monthly report "Retail prices of major products in Tokyo" published by Tokyo Metropolitan government can be downloaded also.

Table of Contents of Statistics/Rankings/Graphs is here.

Changes in the Prices of Short-necked Clams in Japan, 1970-2014

Shells are common foods in Japan. Short-necked clams used to be gathered in seashore across Japan. We call them "asari". But these days, it is hard to find clams in the beach. 

f:id:nbakki:20150717234051j:plainあさり

Japanese government checks the price of short-necked clams every month. The following data show the changes in the price indexes of short-necked clams between 1970 and 2014, if the price in 2010 is taken as 100. The price is in a rising trend.

f:id:nbakki:20150717233354p:plain

Year Index (2010 = 100) Price of 100g short-necked clams (yen)
1970 8.37 10
1971 9.13 10
1972 10.7 12
1973 13.1 15
1974 18.2 21
1975 22.6 26
1976 27.8 32
1977 34.3 39
1978 40 46
1979 44.8 52
1980 54.4 63
1981 56.1 65
1982 54.3 62
1983 59 68
1984 64.4 74
1985 63.4 73
1986 64.5 74
1987 65.5 75
1988 66.7 77
1989 69 79
1990 72.4 83
1991 75.3 87
1992 77.7 89
1993 78.5 90
1994 78 90
1995 78.5 90
1996 79.6 92
1997 82.1 94
1998 83.4 96
1999 83.5 96
2000 83.6 96
2001 82.9 95
2002 84.7 97
2003 90 104
2004 90.7 104
2005 91.2 105
2006 93.3 107
2007 94.3 108
2008 98.5 113
2009 100.2 115
2010 100 115
2011 98 113
2012 98.6 113
2013 99.2 114
2014 106.2 122

The next graph shows the changes in 100g clams' price from 1970 to 2014.

f:id:nbakki:20150717233627p:plain

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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Table of Contents of Statistics/Rankings/Graphs is here.

In terms of the cost of living information, you can download the Excel price list of goods I posted.

English translation of the monthly report "Retail prices of major products in Tokyo" published by Tokyo Metropolitan government can be downloaded also.