Osaka
225 km²
Oslo
454 km²
Japan
Norway
Area Comparison
Osaka is 2.0x smaller than Oslo
Population Comparison
Osaka has 3.8x more people than Oslo
In terms of area, Oslo is 2.0x the size of Osaka. Oslo spans 454 km² (175 mi²) while Osaka covers 225 km² (87 mi²) — a difference of 229 km². You could fit Osaka inside Oslo approximately 2 times.
To put Osaka's size in perspective, its area of 225 km² is roughly the same size as Amsterdam. Meanwhile, Oslo at 454 km² is about 1.3x smaller than Seoul.
Osaka's footprint is roughly about 32,000 American football fields, 110 times the area of Monaco, or 66 times the area of Central Park — pick whichever unit feels intuitive. Oslo works out to about 64,000 American football fields, 130 times the area of Central Park, or 8 times the area of Manhattan.
Osaka is a designated city in the Kansai region of Honshu in Japan. It is the capital of and most populous city in Osaka Prefecture, and the third-most populous city in Japan, following the special wards of Tokyo and Yokohama. With an estimated population of 2,816,247 as of October 1, 2025 and a population density of about 12,505 people per square kilometer, it is the largest component of the Keihanshin Metropolitan Area, the second-largest metropolitan area in Japan and the 10th-largest urban…
Known as "Nation's Kitchen", Osaka covers 225 km² with a population of 2.8 million. The city was established in 645. Osaka is known for Osaka Castle, Dotonbori district, Universal Studios Japan, among other attractions. The city's main transit system is the Osaka Metro.
Osaka is the third-most populous city in Japan, following the special wards of Tokyo and Yokohama.
Oslo is the capital and most populous city of Norway. It constitutes both a county and a municipality. The municipality of Oslo had a population of 724,290 in 2025, while the city's greater urban area had a population of 1,110,887 in 2025, and the metropolitan area had an estimated population of 1,546,706 in 2021.
Also known as "Tigerstaden", Oslo has an area of 454 km² and is home to 0.7 million people. It was established in 1048. Visitors come for Vigeland Park, Oslo Opera House, Akershus Fortress, and much more.
Oslo is both a county and a municipality, with the city itself home to about 724,000 residents in 2025.
Osaka has a population density of 12,222 people per km² — an extremely dense urban environment. Oslo, with 1,586 people per km², is a relatively spread-out city. Osaka is dramatically more crowded, with 7.7x the population density.
Size Ratio
Osaka fits inside Oslo ~2 times
Density Gap
Osaka is 7.7x more densely populated
History
Osaka is ~403 years older
Osaka covers 225 km². Cities with a similar urban footprint include Amsterdam (219 km²), Boston (232 km²), Helsinki (214 km²), Kuala Lumpur (243 km²), or Buenos Aires (203 km²).
Oslo covers 454 km². Cities with a similar urban footprint include Prague (496 km²), Vienna (415 km²), Montreal (498 km²), Denver (401 km²), or Warsaw (517 km²).
The straight-line distance from Osaka to Oslo is 8,348 km (5,187 miles), with an estimated flight time of ~10h 19m.
Want to explore more? Compare city sizes for any two cities worldwide, or share your location live with friends.