Result: ¥100 in 1986 → ¥128.94 in 2024
The Japanese Yen has lost 22% its value since 1986
Updated: September 11, 2025¥100 in 1986 is equivalent in purchasing power to about ¥128.94 today, an increase of ¥28.94 over 38 years. The yen had an average inflation rate of 0.67% per year between 1986 and today, producing a cumulative price increase of 28.94%.
This means that today's prices are 1.29 times as high as average prices since 1986, according to the OECD and the World Bank consumer price index for Japan. A yen today only buys 77.555% of what it could buy back then.
The inflation rate in 1986 was 0.61%. The current inflation rate compared to the end of last year is now 2.88%. If this number holds, ¥100 today will be equivalent in buying power to ¥102.88 next year.
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| Cumulative price change | 28.94% |
| Average inflation rate | 0.67% |
| Converted amount ¥100 base | ¥128.94 |
| Price difference ¥100 base | ¥28.94 |
| CPI in 1986 | 85.866 |
| CPI in 2024 | 110.714 |
| Inflation in 1986 | 0.61% |
| Inflation in 2024 | 2.88% |
| ¥100 in 1986 | ¥128.94 in 2024 |
Buying power of ¥100 in 1986
This chart shows a calculation of buying power equivalence for ¥100 in 1986 (price index tracking began in 1955).
For example, if you started with ¥100, you would need to end with ¥128.94 in order to "adjust" for inflation (sometimes refered to as "beating inflation").
When ¥100 is equivalent to ¥128.94 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 1986 dollars, the chart below shows how ¥100 is worth less over 38 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 1986 amounts in today's yen, based on the 28.94% change in prices:
| Initial value | Equivalent value |
|---|---|
| ¥1 yen in 1986 | ¥1.29 yen today |
| ¥5 yen in 1986 | ¥6.45 yen today |
| ¥10 yen in 1986 | ¥12.89 yen today |
| ¥50 yen in 1986 | ¥64.47 yen today |
| ¥100 yen in 1986 | ¥128.94 yen today |
| ¥500 yen in 1986 | ¥644.69 yen today |
| ¥1,000 yen in 1986 | ¥1,289.38 yen today |
| ¥5,000 yen in 1986 | ¥6,446.90 yen today |
| ¥10,000 yen in 1986 | ¥12,893.80 yen today |
| ¥50,000 yen in 1986 | ¥64,468.98 yen today |
| ¥100,000 yen in 1986 | ¥128,937.96 yen today |
| ¥500,000 yen in 1986 | ¥644,689.82 yen today |
| ¥1,000,000 yen in 1986 | ¥1,289,379.65 yen today |
How to calculate inflation rate for ¥100 since 1986
Our calculations use the following inflation rate formula to calculate the change in value between 1986 and today:
CPI today CPI in 1986
×
1986 JPY value
=
Today's value
Then plug in historical CPI values. The Japanese CPI was 85.86578 in the year 1986 and 110.71358916166263 in 2024:
110.7135891616626385.86578
×
¥100
=
¥128.94
¥100 in 1986 has the same "purchasing power" or "buying power" as ¥128.94 in 2024.
To get the total inflation rate for the 38 years between 1986 and 2024, we use the following formula:
CPI in 2024 - CPI in 1986CPI in 1986
×
100
=
Cumulative inflation rate (38 years)
Plugging in the values to this equation, we get:
110.71358916166263 - 85.8657885.86578
×
100
=
29%
Data source & citation
You may use the following MLA citation for this page: “Value of 1986 Japanese Yen today | Japan Inflation Calculator.” Official Inflation Data, Alioth Finance, 13 Dec. 2025, https://www.officialdata.org/japan/inflation/1986.
Special thanks to QuickChart for their chart image API, which is used for chart downloads.
| Cumulative price change | 28.94% |
| Average inflation rate | 0.67% |
| Converted amount ¥100 base | ¥128.94 |
| Price difference ¥100 base | ¥28.94 |
| CPI in 1986 | 85.866 |
| CPI in 2024 | 110.714 |
| Inflation in 1986 | 0.61% |
| Inflation in 2024 | 2.88% |
| ¥100 in 1986 | ¥128.94 in 2024 |