The map above shows Japan and Western Australia side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Japan vs Western Australia Geography
Land area: Japan has a land area of 140,752 square miles (364,546 km²), while Western Australia has 975,685 square miles (2,527,013 km²). Western Australia's land area is 6.9 times (593%) larger than Japan's.
Total area: Japan: 145,937 square miles (377,975 km²) vs Western Australia: 975,685 square miles (2,527,013 km²), including inland and coastal water. Western Australia's total area is 6.7 times (569%) larger than Japan's.
Length: Japan is 1,557 miles (2,505 km) long from north to south; Western Australia is 1,590 miles (2,558 km). Japan and Western Australia have about the same north-south length.
Width: Japan spans 1,568 miles (2,524 km) east to west; Western Australia spans 1,286 miles (2,069 km). Japan's east-west width is 1.2 times (22%) wider than Western Australia's.
Highest point: Japan's highest point is Mount Fuji at 12,388 feet (3,776 m); Western Australia's is Mount Meharry at 4,098 feet (1,249 m). Mount Fuji is 8,290 feet higher than Mount Meharry.
Lowest point: Japan's lowest point is Hachirogata at -13 feet; Western Australia's is Indian Ocean at 0 feet. Japan's lowest point is 13 feet lower.
Japan vs Western Australia Population and History
Population: Japan has a population of 122,680,000 (2026), while Western Australia has 3,061,672 (2025). Japan's population is 40.1 times larger than Western Australia's.
Population density: Japan: 871.6 people per square mile vs Western Australia: 3.1. Japan's population density is 281.2 times higher than Western Australia's.
Largest metro area: Japan's largest metropolitan area is Tokyo (33,412,512 people) vs Western Australia's Greater Perth (2,452,765). Tokyo's population is 13.6 times larger than Greater Perth's.
History: Japan: An independent state for over two millennia; the current constitution dates from 1947. Western Australia: Became an Australian state at Federation on January 1, 1901; founded as a colony in 1829. In its current form, Japan is the older of the two by 1,241 years.
Japan vs Western Australia Economy
GDP: Japan's GDP is $4,435.2 billion (2025) vs Western Australia's $304.6 billion. Japan's economic output is 14.6 times larger than Western Australia's.
GDP per capita: Japan: $35,951 per person vs Western Australia: $99,488. Western Australia's GDP per capita is 2.8 times (177%) higher than Japan's.
Official Websites
Japan official website · Western Australia official website
More Size Comparisons
All Japan size comparisons · All Western Australia 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.