Japan is about 1.3 times smaller than Spain.

Spain is approximately 505,370 sq km, while Japan is approximately 377,915 sq km, making Japan 74.78% the size of Spain. Meanwhile, the population of Spain is ~47.2 million people (77.1 million more people live in Japan).
This to-scale comparison of Spain vs. Japan uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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