[PEREZGONZALEZ Jose D (2013). Referential JPY based on CPI (2013e)3. Knowledge (ISSN 2324-1624), 2014, pages 12-14.] [DOI] [Printer friendly]
Referential JPY
Referential Japanese yen (rJPY, r¥) is the real value of the Japanese yen (JPY, ¥) back in 2010, which is used here as referential currency for better understanding the value of money overtime. The referential yen is based on the average annual CPI (Consumer Price Index) for Japan (Rate Inflation, 20132). It is calculated by updating the nominal value of the yen with the appropriate multiplier. The formula for transforming JPY into rJPY follows, while Table 1 provides the correct multiplier (an inflator/deflator multiplier) for the formula.
| Formula |
|---|
| rJPY = nominal JPY + (nominal JPY * multiplier) |
| Table 1. CPI for Japan and rJPY multiplier | ||||
|---|---|---|---|---|
| Year | CPI A.Avg | Base 2010 | multiplier | |
| 1970 | 32.7 | 100.0 | 2.0581 | |
| 1971 | 34.8 | 100.0 | 1.8736 | |
| 1972 | 36.4 | 100.0 | 1.7473 | |
| 1973 | 40.7 | 100.0 | 1.4570 | |
| 1974 | 50.1 | 100.0 | 0.9960 | |
| 1975 | 56.0 | 100.0 | 0.7857 | |
| 1976 | 61.3 | 100.0 | 0.6313 | |
| 1977 | 66.2 | 100.0 | 0.5106 | |
| 1978 | 69.0 | 100.0 | 0.4493 | |
| 1979 | 71.6 | 100.0 | 0.3966 | |
| 1980 | 77.2 | 100.0 | 0.2953 | |
| 1981 | 81.0 | 100.0 | 0.2346 | |
| 1982 | 83.2 | 100.0 | 0.2019 | |
| 1983 | 84.7 | 100.0 | 0.1806 | |
| 1984 | 86.7 | 100.0 | 0.1534 | |
| 1985 | 88.4 | 100.0 | 0.1312 | |
| 1986 | 89.0 | 100.0 | 0.1236 | |
| 1987 | 89.1 | 100.0 | 0.1223 | |
| 1988 | 89.7 | 100.0 | 0.1148 | |
| 1989 | 91.7 | 100.0 | 0.0905 | |
| 1990 | 94.5 | 100.0 | 0.0582 | |
| 1991 | 97.6 | 100.0 | 0.0246 | |
| 1992 | 99.3 | 100.0 | 0.0070 | |
| 1993 | 100.5 | 100.0 | -0.0050 | |
| 1994 | 101.2 | 100.0 | -0.0119 | |
| 1995 | 101.1 | 100.0 | -0.0109 | |
| 1996 | 101.2 | 100.0 | -0.0119 | |
| 1997 | 103.0 | 100.0 | -0.0291 | |
| 1998 | 103.7 | 100.0 | -0.0357 | |
| 1999 | 103.4 | 100.0 | -0.0329 | |
| 2000 | 102.7 | 100.0 | -0.0263 | |
| 2001 | 101.9 | 100.0 | -0.0186 | |
| 2002 | 101.0 | 100.0 | -0.0099 | |
| 2003 | 100.7 | 100.0 | -0.0070 | |
| 2004 | 100.7 | 100.0 | -0.0070 | |
| 2005 | 100.4 | 100.0 | -0.0040 | |
| 2006 | 100.7 | 100.0 | -0.0070 | |
| 2007 | 100.7 | 100.0 | -0.0070 | |
| 2008 | 102.1 | 100.0 | -0.0206 | |
| 2009 | 100.7 | 100.0 | -0.0070 | |
| 2010 | 100.0 | 100.0 | 0.0000 | |
| 2011 | 99.7 | 100.0 | 0.0030 | |
| 2012 | 99.7 | 100.0 | 0.0030 | |
| 2013 | 100.0 | 100.0 | 0.0000 | |
| 2014* | 103.0 | 100.0 | -0.0291 | |
| 2015* | 106.1 | 100.0 | -0.0574 | |
| 2016* | 109.3 | 100.0 | -0.0849 | |
| 2017* | 112.6 | 100.0 | -0.1115 | |
| 2018* | 115.9 | 100.0 | -0.1374 | |
| 2019* | 119.4 | 100.0 | -0.1625 | |
| 2020* | 123.0 | 100.0 | -0.1869 | |
| 2021* | 126.7 | 100.0 | -0.2106 | |
| (*Assuming a 3% accumulated inflation rate.) | ||||
Author
Jose D PEREZGONZALEZ (2014). Massey University, Turitea Campus, Private Bag 11-222, Palmerston North 4442, New Zealand. (JDPerezgonzalez).
Want to know more?
- MeasuringWorth - Japanese calculator
- A handy website to learn about different inflation indexes and calculate the value of Japanese money according to those indexes, although it stops at year 2009.
- WikiofScience - Referential currency (list of topics)
- This WikiofScience page provides a list of topics related to referential currencies.
