Japan vs. United States: Size, Population, and Economy Compared

The United States dwarfs Japan in almost every macroscopic metric, yet Japan remains an economic powerhouse with a fraction of the land and people.

Land Area

• Japan: 377,975 km² (145,937 sq mi)
• United States: 9,833,517 km² (3,800,408 sq mi)
• Ratio: The U.S. is ~26× larger.

Population (2020)

• Japan: 126.4 million
• United States: 331.0 million
• Ratio: The U.S. has ~2.6× more people.

GDP (2020, nominal)

• Japan: $5.06 trillion
• United States: $20.94 trillion
• Ratio: The U.S. economy is ~4× larger.

Key Takeaway

While the U.S. leads in scale, Japan's GDP per capita (~$40k vs. ~$63k) and high-density urban efficiency reflect a different development model. Both are G7 members with advanced technological economies.