Country size comparison
compared to
Japan is about 22 times bigger than Swaziland.
Swaziland is approximately 17,364 sq km, while Japan is approximately 377,915 sq km, making Japan 2,076% larger than Swaziland. Meanwhile, the population of Swaziland is ~1.1 million people (123.1 million more people live in Japan).
Compare further: Japan vs. Swaziland