How many years of comparable data are there for Japan and Samoa?

36 years are reported by both, from 1990 to 2025.

Where does this data come from?

Statizoid (derived), published as GDP, PPP (constant 2021 international $), per unit of GDP. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Japan vs Samoa: GDP, PPP (constant 2021 international $), per unit of GDP

Japan

1.34 constant 2021 international $ per US$ of GDP

in 2025

Samoa

1.36 constant 2021 international $ per US$ of GDP

in 2025

Japan rank

145th

Samoa rank

143rd

GDP, PPP (constant 2021 international $), per unit of GDP over time

Japan
Samoa

How they compare

Samoa currently reports 1.36 constant 2021 international $ per US$ of GDP against 1.34 constant 2021 international $ per US$ of GDP in Japan, a difference of 0.02 constant 2021 international $ per US$ of GDP.

Across all 36 years both countries report, Samoa has been ahead every year.

Japan ranks 145th and Samoa ranks 143rd of 200 countries.

Samoa has averaged higher in every one of the 4 decades both report.

Head to head by decade

Decade	Japan	Samoa	Difference	Ahead
1990s	1.08 constant 2021 international $ per US$ of GDP	3.87 constant 2021 international $ per US$ of GDP	2.79 constant 2021 international $ per US$ of GDP	Samoa
2000s	1.1 constant 2021 international $ per US$ of GDP	2.59 constant 2021 international $ per US$ of GDP	1.49 constant 2021 international $ per US$ of GDP	Samoa
2010s	1.05 constant 2021 international $ per US$ of GDP	1.64 constant 2021 international $ per US$ of GDP	0.5804 constant 2021 international $ per US$ of GDP	Samoa
2020s	1.27 constant 2021 international $ per US$ of GDP	1.52 constant 2021 international $ per US$ of GDP	0.2509 constant 2021 international $ per US$ of GDP	Samoa

Averages of every year both report within each decade.

Frequently asked questions

Which has higher gdp, ppp (constant 2021 international $), per unit of gdp, Japan or Samoa?: Samoa, at 1.36 constant 2021 international $ per US$ of GDP against 1.34 constant 2021 international $ per US$ of GDP in Japan as of 2025.
What is the difference in gdp, ppp (constant 2021 international $), per unit of gdp between Japan and Samoa?: 0.02 constant 2021 international $ per US$ of GDP, with Samoa ahead.
How many years of comparable data are there for Japan and Samoa?: 36 years are reported by both, from 1990 to 2025.
How do Japan and Samoa rank globally for gdp, ppp (constant 2021 international $), per unit of gdp?: Japan ranks 145th and Samoa ranks 143rd of 200 countries.
Where does this data come from?: Statizoid (derived), published as GDP, PPP (constant 2021 international $), per unit of GDP. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Japan vs Samoa: GDP, PPP (constant 2021 international $), per unit of GDP. Statizoid, drawing on Statizoid (derived). Retrieved 28 September 2026, from https://economy.statizoid.com/compare/gdp-ppp-constant-2021-international-per-unit-of-gdp/japan/samoa/

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About this data

Indicator: GDP, PPP (constant 2021 international $), per unit of GDP
Unit: constant 2021 international $ per US$ of GDP
Source: Statizoid (derived)
Licence: Derived by Statizoid from the sources named on the page
Coverage: 247 places, 8,673 data points, 1990–2025
Last refreshed: 25 September 2026

GDP, PPP (constant 2021 international $) divided by GDP (current US$), matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.