Equatorial Guinea is about 13 times smaller than Japan.

Japan is approximately 377,915 sq km, while Equatorial Guinea is approximately 28,051 sq km, making Equatorial Guinea 7.42% the size of Japan. Meanwhile, the population of Japan is ~124.2 million people (122.5 million fewer people live in Equatorial Guinea).
Tip: This to-scale comparison of Japan vs. Equatorial Guinea uses the Mercator projection, which distorts the size of regions near the poles.
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