Japan is about 4.5 times bigger than United Arab Emirates.

United Arab Emirates is approximately 83,600 sq km, while Japan is approximately 377,915 sq km, making Japan 352% larger than United Arab Emirates. Meanwhile, the population of United Arab Emirates is ~11.5 million people (111.9 million more people live in Japan).
Tip: This to-scale comparison of United Arab Emirates vs. Japan uses the Mercator projection, which distorts the size of regions near the poles.
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