Japan Inflation Calculator

Buying power of ¥1 in 1981

This chart shows a calculation of buying power equivalence for ¥1 in 1981 (price index tracking began in 1955).

For example, if you started with ¥1, you would need to end with ¥1.26 in order to "adjust" for inflation (sometimes refered to as "beating inflation").

When ¥1 is equivalent to ¥1.26 over time, that means that the "real value" of a single Japanese yen decreases over time. In other words, a yen will pay for fewer items at the store.

This effect explains how inflation erodes the value of a yen over time. By calculating the value in 1981 dollars, the chart below shows how ¥1 is worth less over 45 years.

According to the OECD and the World Bank, each of these JPY amounts below is equal in terms of what it could buy at the time:

This conversion table shows various other 1981 amounts in today's yen, based on the 26.17% change in prices:

How to calculate inflation rate for ¥1 since 1981

Our calculations use the following inflation rate formula to calculate the change in value between 1981 and today:

Then plug in historical CPI values. The Japanese CPI was 78.14542 in the year 1981 and 98.5928665885014 in 2026:

¥1 in 1981 has the same "purchasing power" or "buying power" as ¥1.26 in 2026.

To get the total inflation rate for the 45 years between 1981 and 2026, we use the following formula:

Plugging in the values to this equation, we get:

Data source & citation

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