* Area: 377,975 km² (145,937 sq mi)
* Population: 126,440,000 (2019)
* Density: 335/km² (868/sq mi)
Puerto Rico
* Area: 8,875 km² (3,427 sq mi)
* Population: 3,194,034 (2019)
* Density: 360/km² (932/sq mi)
Comparison
* Japan is approximately 43 times larger than Puerto Rico in terms of land area.
* Japan has a population that is approximately 40 times larger than that of Puerto Rico.
* The population density of Japan is slightly lower than that of Puerto Rico.