Japan is about 1.3 times bigger than Nevada.

Nevada is approximately 284,448 sq km, while Japan is approximately 377,915 sq km, making Japan 33% larger than Nevada. Meanwhile, the population of Nevada is ~2.7 million people (121.5 million more people live in Japan).
Tip: This to-scale comparison of Nevada vs. Japan uses the Mercator projection, which distorts the size of regions near the poles.
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