Tonga is about 506 times smaller than Japan.

Japan is approximately 377,915 sq km, while Tonga is approximately 747 sq km, making Tonga 0.2% the size of Japan. Meanwhile, the population of Japan is ~124.2 million people (124.1 million fewer people live in Tonga).
This to-scale comparison of Japan vs. Tonga uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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