The map above shows Japan and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Japan vs Ontario Geography
Land area
- Japan has a land area of 140,752 square miles (364,546 km²), while Ontario has 354,342 square miles (917,741 km²).
- Ontario's land area is 2.5 times (152%) larger than Japan's.
Total area
- Japan: 145,937 square miles (377,975 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water.
- Ontario's total area is 2.8 times (185%) larger than Japan's.
Length
- Japan is 1,557 miles (2,505 km) long from north to south; Ontario is 1,085 miles (1,747 km).
- Japan's north-south length is 1.4 times (44%) longer than Ontario's.
Width
- Japan spans 1,568 miles (2,524 km) east to west; Ontario spans 1,013 miles (1,630 km).
- Japan's east-west width is 1.5 times (55%) wider than Ontario's.
Highest point
- Japan's highest point is Mount Fuji at 12,388 feet (3,776 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m).
- Mount Fuji is 10,114 feet higher than Ishpatina Ridge.
Lowest point
- Japan's lowest point is Hachirogata at -13 feet; Ontario's is Hudson Bay at 0 feet.
- Japan's lowest point is 13 feet lower.
Japan vs Ontario Population and History
Population
- Japan has a population of 122,680,000 (2026), while Ontario has 16,136,480 (2026).
- Japan's population is 7.6 times (660%) larger than Ontario's.
Population density
- Japan: 871.6 people per square mile vs Ontario: 45.5.
- Japan's population density is 19.2 times higher than Ontario's.
Biggest city
- Japan's biggest city is Tokyo with 13,515,271 people; Ontario's is Toronto with 2,794,356.
- Tokyo's population is 4.8 times (384%) larger than Toronto's.
Largest metro area
- Japan's largest metropolitan area is Tokyo (33,412,512 people) vs Ontario's Toronto CMA (6,202,225).
- Tokyo's population is 5.4 times (439%) larger than Toronto CMA's.
History
- Japan: An independent state for over two millennia; the current constitution dates from 1947.
- Ontario: Joined Confederation on July 1, 1867, as one of the four founding provinces.
- In its current form, Japan is the older of the two by 1,207 years.
Japan vs Ontario Economy
GDP
- Japan's GDP is $4,435.2 billion (2025) vs Ontario's $873.9 billion.
- Japan's economic output is 5.1 times (408%) larger than Ontario's.
GDP per capita
- Japan: $35,951 per person vs Ontario: $54,132.
- Ontario's GDP per capita is 1.5 times (51%) higher than Japan's.
Official Websites
Japan official website · Ontario official website
Download the Japan vs Ontario Size Comparison Map for free
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More Size Comparisons
All Japan size comparisons · All Ontario 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.