Japan is about 506 times bigger than Tonga.

Tonga is approximately 747 sq km, while Japan is approximately 377,915 sq km, making Japan 50,491% larger than Tonga. Meanwhile, the population of Tonga is ~105,517 people (124.1 million more people live in Japan).
This to-scale comparison of Tonga vs. Japan uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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