Massachusetts is about 19 times smaller than Japan.

Japan is approximately 377,915 sq km, while Massachusetts is approximately 20,306 sq km, making Massachusetts 5.37% the size of Japan. Meanwhile, the population of Japan is ~124.2 million people (117.7 million fewer people live in Massachusetts).
This to-scale comparison of Japan vs. Massachusetts uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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