The map above shows Oklahoma and Japan side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Oklahoma vs Japan Geography
Land area: Oklahoma has a land area of 68,597 square miles (177,665 km²), while Japan has 140,752 square miles (364,546 km²). Japan's land area is 2.1 times (105%) larger than Oklahoma's.
Total area: Oklahoma: 69,899 square miles (181,038 km²) vs Japan: 145,937 square miles (377,975 km²), including inland and coastal water. Japan's total area is 2.1 times (109%) larger than Oklahoma's.
Length: Oklahoma is 533 miles (857 km) long from north to south; Japan is 1,557 miles (2,505 km). Japan's north-south length is 2.9 times (192%) longer than Oklahoma's.
Width: Oklahoma spans 490 miles (789 km) east to west; Japan spans 1,568 miles (2,524 km). Japan's east-west width is 3.2 times (220%) wider than Oklahoma's.
Highest point: Oklahoma's highest point is Black Mesa at 4,980 feet (1,518 m); Japan's is Mount Fuji at 12,388 feet (3,776 m). Mount Fuji is 7,408 feet higher than Black Mesa.
Lowest point: Oklahoma's lowest point is Little River at 289 feet; Japan's is Hachirogata at -13 feet. Japan's lowest point is 302 feet lower.
Oklahoma vs Japan Population and History
Population: Oklahoma has a population of 4,095,393 (2024), while Japan has 122,680,000 (2026). Japan's population is 30.0 times larger than Oklahoma's.
Population density: Oklahoma: 59.7 people per square mile vs Japan: 871.6. Japan's population density is 14.6 times higher than Oklahoma's.
Biggest city: Oklahoma's biggest city is Oklahoma City with 712,919 people; Japan's is Tokyo with 13,515,271. Tokyo's population is 19.0 times larger than Oklahoma City's.
Largest metro area: Oklahoma's largest metropolitan area is Oklahoma City, OK metro area (1,497,821 people) vs Japan's Tokyo (33,412,512). Tokyo's population is 22.3 times larger than Oklahoma City, OK metro area's.
History: Oklahoma: Admitted to the Union on November 16, 1907, as the 46th state. Japan: An independent state for over two millennia; the current constitution dates from 1947. In its current form, Japan is the older of the two by 1,247 years.
Oklahoma vs Japan Economy
GDP: Oklahoma's GDP is $263.7 billion (2024) vs Japan's $4,435.2 billion. Japan's economic output is 16.8 times larger than Oklahoma's.
GDP per capita: Oklahoma: $64,388 per person vs Japan: $35,951. Oklahoma's GDP per capita is 1.8 times (79%) higher than Japan's.
Average income: Oklahoma: $63,708 vs Japan: $38,340 average income per person (per capita personal income). Oklahoma's average income is 1.7 times (66%) higher than Japan's.
Official Websites
Oklahoma official website · Japan official website
More Size Comparisons
All Oklahoma size comparisons · All Japan size comparisons
Area, elevation and boundary figures come from official national statistics and US Census Bureau and Natural Earth boundary data; US state population, economic, county and tax figures come from the US Census Bureau, the Bureau of Economic Analysis and the Tax Foundation. Figures are rounded and for general reference.