Result:¥100 in 1974 → ¥203.84 in 2026
The Japanese Yen has lost 51% its value since 1974
Updated: March 11, 2026¥100 in 1974 is equivalent in purchasing power to about ¥203.84 today, an increase of ¥103.84 over 52 years. The yen had an average inflation rate of 1.38% per year between 1974 and today, producing a cumulative price increase of 103.84%.
This means that today's prices are 2.04 times as high as average prices since 1974, according to the OECD and the World Bank consumer price index for Japan. A yen today only buys 49.058% of what it could buy back then.
The inflation rate in 1974 was 23.21%. The current inflation rate compared to the end of last year is now -0.60%. If this number holds, ¥100 today will be equivalent in buying power to ¥99.40 next year.
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| Cumulative price change | 103.84% |
| Average inflation rate | 1.38% |
|
Converted amount
¥100 base | ¥203.84 |
|
Price difference
¥100 base | ¥103.84 |
| CPI in 1974 | 48.367 |
| CPI in 2026 | 98.593 |
| Inflation in 1974 | 23.21% |
| Inflation in 2026 | -0.60% |
| ¥100 in 1974 | ¥203.84 in 2026 |
Buying power of ¥100 in 1974
This chart shows a calculation of buying power equivalence for ¥100 in 1974 (price index tracking began in 1955).
For example, if you started with ¥100, you would need to end with ¥203.84 in order to "adjust" for inflation (sometimes refered to as "beating inflation").
When ¥100 is equivalent to ¥203.84 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 1974 dollars, the chart below shows how ¥100 is worth less over 52 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 1974 amounts in today's yen, based on the 103.84% change in prices:
| Initial value | Equivalent value |
|---|---|
| ¥1 yen in 1974 | ¥2.04 yen today |
| ¥5 yen in 1974 | ¥10.19 yen today |
| ¥10 yen in 1974 | ¥20.38 yen today |
| ¥50 yen in 1974 | ¥101.92 yen today |
| ¥100 yen in 1974 | ¥203.84 yen today |
| ¥500 yen in 1974 | ¥1,019.22 yen today |
| ¥1,000 yen in 1974 | ¥2,038.44 yen today |
| ¥5,000 yen in 1974 | ¥10,192.20 yen today |
| ¥10,000 yen in 1974 | ¥20,384.39 yen today |
| ¥50,000 yen in 1974 | ¥101,921.96 yen today |
| ¥100,000 yen in 1974 | ¥203,843.93 yen today |
| ¥500,000 yen in 1974 | ¥1,019,219.64 yen today |
| ¥1,000,000 yen in 1974 | ¥2,038,439.28 yen today |
How to calculate inflation rate for ¥100 since 1974
Our calculations use the following inflation rate formula to calculate the change in value between 1974 and today:
CPI todayCPI in 1974
×
1974 JPY value
=
Today's value
Then plug in historical CPI values. The Japanese CPI was 48.36684 in the year 1974 and 98.5928665885014 in 2026:
98.592866588501448.36684
×
¥100
=
¥203.84
¥100 in 1974 has the same "purchasing power" or "buying power" as ¥203.84 in 2026.
To get the total inflation rate for the 52 years between 1974 and 2026, we use the following formula:
CPI in 2026 - CPI in 1974CPI in 1974
×
100
=
Cumulative inflation rate (52 years)
Plugging in the values to this equation, we get:
98.5928665885014 - 48.3668448.36684
×
100
=
104%
Data source & citation
You may use the following MLA citation for this page: “Value of 1974 Japanese Yen today | Japan Inflation Calculator.” Official Inflation Data, Alioth Finance, 4 Apr. 2026, https://www.officialdata.org/japan/inflation/1974.
Special thanks to QuickChart for their chart image API, which is used for chart downloads.
| Cumulative price change | 103.84% |
| Average inflation rate | 1.38% |
|
Converted amount
¥100 base | ¥203.84 |
|
Price difference
¥100 base | ¥103.84 |
| CPI in 1974 | 48.367 |
| CPI in 2026 | 98.593 |
| Inflation in 1974 | 23.21% |
| Inflation in 2026 | -0.60% |
| ¥100 in 1974 | ¥203.84 in 2026 |