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 Sweet Potato in Japan, 1970-2014

Ministry of Internal Affairs and Communications monitors the price of sweet potatoes monthly.

The data below show the changes in the price indexes of sweet potatoes between 1970 and 2014, if the price in 2010 is taken as 100.

f:id:nbakki:20150820122123p:plain

Year Index (2010 = 100) Price of 1kg sweet potato (yen)
1970 24.4 104
1971 25 107
1972 22.6 97
1973 29.3 125
1974 51.5 220
1975 48 205
1976 46.1 197
1977 53.4 228
1978 49.3 211
1979 57.9 247
1980 68.4 292
1981 74.4 318
1982 68.5 292
1983 71.4 305
1984 87.4 373
1985 76.1 325
1986 77.5 331
1987 73.9 316
1988 85.6 366
1989 91.1 389
1990 86.8 371
1991 99.8 426
1992 118 504
1993 115.7 494
1994 108.8 465
1995 92.4 395
1996 103.6 442
1997 100.8 430
1998 101.5 433
1999 103 440
2000 97.2 415
2001 88.9 380
2002 96.2 411
2003 106.5 455
2004 97.1 415
2005 94.4 403
2006 106 453
2007 106.2 453
2008 103.3 441
2009 94.4 403
2010 100 427
2011 105.3 450
2012 98.6 421
2013 92.3 394
2014 102.4 437

The next graph shows the changes in 1 kg sweet potatoes price from 1970 to 2014.

f:id:nbakki:20150820122203p: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

Related Topics

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.