Japan grew and shrank at the same time
Between 2015 and 2025 Japan’s GDP rose from $4.534 trillion to $4.764 trillion measured in constant 2015 dollars — about 5% growth. Over exactly the same years, measured in current dollars, it fell from $4.534 trillion to $4.435 trillion, a drop of about 2%. Both figures come from the World Bank. They differ because one holds prices and the exchange rate fixed and the other does not.
The two measures do not even agree on which year was Japan’s worst: in constant dollars it was 2020, when output actually fell; in current dollars it was 2022, when output rose.
How can an economy grow and shrink at once?
Because “the size of an economy” is not one number. Real GDP counts output with prices and the exchange rate frozen at a base year. Nominal GDP counts the same output at today’s prices and today’s exchange rate. When a currency weakens or domestic prices move, the second changes while the first does not. Neither is wrong; they answer different questions.
Why do the two lines start at the same point?
Because 2015 is the base year. Constant 2015 US dollars are current US dollars in 2015 — the conversion is by definition a multiplication by one. That shared starting point is what makes the chart readable: everything that opens up after it is the combined effect of domestic prices and the exchange rate, isolated by construction rather than by estimate.
Which year was Japan’s worst?
It depends entirely on which series you read. In constant dollars the worst single year was 2020, when output fell from $4.665 trillion to $4.465 trillion — the pandemic, visible as you would expect. In current dollars the worst year was 2022, a fall from $5.226 trillion to $4.448 trillion. In that same 2022, real output rose. The dollar figure recorded a collapse in a year the economy grew.
When did the real line pass the nominal one?
In 2022, and it has stayed above ever since — $4.686 trillion real against $4.448 trillion nominal, widening to $4.764 trillion against $4.435 trillion by 2025. Before 2022 the nominal figure was the larger of the two for six straight years. Nothing about Japanese output inverted in 2022; what inverted was the relationship between the two ways of counting it.
Which measure should you actually use?
For rankings of economies at a point in time, current dollars, because that is what converts every country to a common unit. For whether a country produced more than before, constant prices, because that is the only one holding the yardstick still. The failure mode is using the first to answer the second — which is what a headline does when it reports a ranking change as economic decline.
How this was measured
- Indicator
- — World Bank — GDP constant 2015 US$ (NY.GDP.MKTP.KD) and GDP current US$ (NY.GDP.MKTP.CD)
- What it means
- — Two GDP series for the same country. Constant 2015 US$ holds both domestic prices and the exchange rate fixed, so it tracks output. Current US$ includes both, so it tracks output priced at today’s rates. They are equal in 2015 by construction.
- Period covered
- — 2015 to 2025
- Published
- — 26 July 2026
- Figures last verified
- — 26 July 2026. Every value in the CSV below was compared against the live source on that date; the page is not edited and this date does not move unless they still match. The source can revise its own figures at any time, and Furlen does not independently audit it.
- Rights
- — World Bank open data (CC BY 4.0) — cited with attribution
Common questions
Did Japan’s economy actually shrink?
Not in output terms over this decade. Constant-price GDP rose about 5% between 2015 and 2025, with a genuine fall in 2020. The widely reported shrinkage is the current-dollar series, which fell about 2% over the same period because it also carries domestic prices and the exchange rate.
Why is Japan’s GDP falling in dollars but rising in yen terms?
This page does not have the yen series, so it will not assert that. What it can show is that the constant-dollar measure — which strips out both inflation and exchange-rate movement — rises while the current-dollar measure falls. The gap between the two is by definition the combined price and currency effect.
Is one of these numbers wrong?
No. Both are published by the World Bank and both are correct for what they measure. The mistake is treating them as interchangeable. Any claim about an economy “growing” or “shrinking” is incomplete without saying which of the two it refers to.
Make one from your own data
This chart was built in Furlen from the CSV above, and every figure in the text is recomputed from those rows before export. You can do the same with a spreadsheet, or ask for a public dataset by name.
More on how claims are checked on the Truth Engine page.