Value of 1978 Japanese Yen today

¥100 in 1978

¥157.43 in 2018

The inflation rate in Japan between 1978 and today has been 57.43%, which translates into a total increase of ¥57.43. This means that 100 yen in 1978 are equivalent to 157.43 yen in 2018. In other words, the purchasing power of ¥100 in 1978 equals ¥157.43 today. The average annual inflation rate has been 1.11%.

Inflation timeline in Japan (1978-2018)

The following chart ilustrates the equivalence of ¥100 throughout the years due to inflation and CPI changes. All values are equivalent in terms of purchashing power, which means that for each year the same goods or services could be bought with the indicated amount of money.

All calculations are performed in the local currency (JPY) and using 6 decimal digits. Results show only up to 2 decimal digits to favour readability. Inflation data is provided by governments and international institutions on a monthly basis. Today's values were obtained by estimating figures from recent trends.

The following table contains relevant indicators:

Indicator Value
Total Inflation (1978-2018) 56.66%
Total Inflation* 57.43%
Annual inflation avg. (1978-2018) 1.13%
Annual inflation avg.* 1.11%
CPI 1978 64.6
CPI 2018 101.2
CPI today* 101.7
¥1 in 1978 ¥1.57 in 2018

* Values extrapolated from the last official data to obtain today's values.

How to calculate today's value of money after inflation?

There are several ways to calculate the time value of money. Depending on the data available, results can be obtained by using the compound interest formula or the Consumer Price Index (CPI) formula.

Using the compound interest formula

Given that money changes in time as a result of an inflation rate that acts as a compound interest, the following formula can be used: FV = PV (1 + i)n, where:

  • FV: Future Value
  • PV: Present Value
  • i: Interest rate (inflation)
  • n: Number of times the interest is compounded (i.e. # of years)

In this case, the future value represents the final amount obtained after applying the inflation rate to our initial value. In other words, it indicates how much are ¥100 worth today. There are 40 years between 1978 and 2018 and the average inflation rate has been 1.113%. Therefore, we can resolve the formula like this:

FV = PV (1 + i)n = ¥100 * (1 + 0.01)40 = ¥156.66

Using the CPI formula

When the CPI for both start and end years is known, the following formula can be used:

Final value = Initial value *
CPI final/CPI initial

In this case, the CPI in 1978 was 64.6 and the CPI today is 101.7. Therefore,

Final value = Initial value *
CPI final/CPI initial
= ¥100 *
101.2/64.6
= ¥156.66

Japan inflation - Conversion table

Initial Value Equivalent value
¥1 yen in 1978 ¥1.57 yen today
¥5 yen in 1978 ¥7.87 yen today
¥10 yen in 1978 ¥15.74 yen today
¥50 yen in 1978 ¥78.72 yen today
¥100 yen in 1978 ¥157.43 yen today
¥500 yen in 1978 ¥787.15 yen today
¥1,000 yen in 1978 ¥1,574.31 yen today
¥5,000 yen in 1978 ¥7,871.53 yen today
¥10,000 yen in 1978 ¥15,743.06 yen today
¥50,000 yen in 1978 ¥78,715.29 yen today
¥100,000 yen in 1978 ¥157,430.57 yen today
¥500,000 yen in 1978 ¥787,152.87 yen today
¥1,000,000 yen in 1978 ¥1,574,305.74 yen today

Value of Yen in time (by year)

Period Value
1978 100
1979 103.87
1980 109.75
1981 117.65
1982 122.76
1983 125.23
1984 127.4
1985 130.8
1986 132.66
1987 132.2
1988 133.28
1989 134.67
1990 138.24
1991 143.34
1992 147.21
1993 148.92
1994 150.46
1995 151.39
1996 150.77
1997 151.7
1998 154.49
1999 155.42
2000 153.72
2001 153.1
2002 151.24
2003 150.77
2004 150.15
2005 150.46
2006 149.85
2007 150.31
2008 151.39
2009 152.01
2010 149.38
2011 148.92
2012 148.61
2013 148.3
2014 150.77
2015 154.33
2016 154.49
2017 154.95
2018 156.66
Today 157.43