Country size comparison

compared to

Japan is around the same size as Montana.

Montana is approximately 376,979 sq km, while Japan is approximately 377,915 sq km, making Japan 0% larger than Montana. Meanwhile, the population of Montana is ~989,415 people (123.2 million more people live in Japan).
Tip: This to-scale comparison of Montana vs. Japan uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Japan vs. Montana

Flip Comparison · See true size
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Cost of Living Comparison · 7 categories - 2026 data
Montana is 92.2% more expensive than Japan overall
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