Japan is about 16 times bigger than Djibouti.

Djibouti is approximately 23,200 sq km, while Japan is approximately 377,915 sq km, making Japan 1,529% larger than Djibouti. Meanwhile, the population of Djibouti is ~1.2 million people (122.2 million more people live in Japan).
Tip: This to-scale comparison of Djibouti vs. Japan uses the Mercator projection, which distorts the size of regions near the poles.
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