The map above shows New Jersey and Japan side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
New Jersey vs Japan Geography
Land area: New Jersey has a land area of 7,355 square miles (19,049 km²), while Japan has 140,752 square miles (364,546 km²). Japan's land area is 19.1 times larger than New Jersey's.
Total area: New Jersey: 8,719 square miles (22,583 km²) vs Japan: 145,937 square miles (377,975 km²), including inland and coastal water. Japan's total area is 16.7 times larger than New Jersey's.
Length: New Jersey is 169 miles (271 km) long from north to south; Japan is 1,557 miles (2,505 km). Japan's north-south length is 9.2 times (821%) longer than New Jersey's.
Width: New Jersey spans 129 miles (207 km) east to west; Japan spans 1,568 miles (2,524 km). Japan's east-west width is 12.2 times wider than New Jersey's.
Highest point: New Jersey's highest point is High Point at 1,798 feet (548 m); Japan's is Mount Fuji at 12,388 feet (3,776 m). Mount Fuji is 10,590 feet higher than High Point.
Lowest point: New Jersey's lowest point is Atlantic Ocean at 0 feet; Japan's is Hachirogata at -13 feet. Japan's lowest point is 13 feet lower.
New Jersey vs Japan Population and History
Population: New Jersey has a population of 9,500,851 (2024), while Japan has 122,680,000 (2026). Japan's population is 12.9 times larger than New Jersey's.
Population density: New Jersey: 1,291.8 people per square mile vs Japan: 871.6. New Jersey's population density is 1.5 times (48%) higher than Japan's.
Biggest city: New Jersey's biggest city is Newark with 317,303 people; Japan's is Tokyo with 13,515,271. Tokyo's population is 42.6 times larger than Newark's.
Largest metro area: New Jersey's largest metropolitan area is New York-Newark-Jersey City, NY-NJ metro area (19,940,274 people) vs Japan's Tokyo (33,412,512). Tokyo's population is 1.7 times (68%) larger than New York-Newark-Jersey City, NY-NJ metro area's.
History: New Jersey: Admitted to the Union on December 18, 1787, as the 3rd 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 1,127 years.
New Jersey vs Japan Economy
GDP: New Jersey's GDP is $846.0 billion (2024) vs Japan's $4,435.2 billion. Japan's economic output is 5.2 times (424%) larger than New Jersey's.
GDP per capita: New Jersey: $89,045 per person vs Japan: $35,951. New Jersey's GDP per capita is 2.5 times (148%) higher than Japan's.
Average income: New Jersey: $84,893 vs Japan: $38,340 average income per person (per capita personal income). New Jersey's average income is 2.2 times (121%) higher than Japan's.
Official Websites
New Jersey official website · Japan official website
More Size Comparisons
All New Jersey 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.