Japan vs South Korea

Japan has a live population of about 122,222,547 (#12 in the world) and South Korea about 51,579,911 (#31), so Japan has 2.4 times as many people as South Korea. Japan is growing at -0.6% a year and South Korea at -0.1%.

By area Japan is larger: 377,969 km² against 100,450 km², which gives population densities of 323.4 people per km² in Japan and 513.5 in South Korea.

Japan's economy is worth $4.44T (2025) and South Korea's $1.87T (2025); per person that is $35,951 in Japan versus $36,227 in South Korea, so the average South Korea resident produces 1 times as much.

Life expectancy is 84 years in Japan and 83.6 in South Korea; women have 1.2 children on average in Japan compared with 0.7 in South Korea; the median age is 50.2 versus 46.2 years.

92.3% of Japan's people live in cities against 81.2% in South Korea; 85.5% use the internet in Japan and 97.9% in South Korea; CO₂ emissions per person are 7.8 t in Japan and 11.4 t in South Korea.