Iran is about 4.4 times bigger than Japan.

Japan is approximately 377,915 sq km, while Iran is approximately 1,648,195 sq km, making Iran 336% larger than Japan. Meanwhile, the population of Japan is ~124.2 million people (37.5 million fewer people live in Iran).
This to-scale comparison of Japan vs. Iran uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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