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Japan
Brazil
Area Comparison
Osaka is 5.4x smaller than Rio de Janeiro
Population Comparison
Osaka has 2.5x fewer people than Rio de Janeiro
In terms of area, Rio de Janeiro is 5.4x the size of Osaka. Rio de Janeiro spans 1,221 km² (471 mi²) while Osaka covers 225 km² (87 mi²) — a difference of 996 km². You could fit Osaka inside Rio de Janeiro approximately 5 times.
To put Osaka's size in perspective, its area of 225 km² is roughly the same size as Amsterdam. Meanwhile, Rio de Janeiro at 1,221 km² is about 1.3x smaller than London.
Japan's third-largest city and a culinary capital. Known as "The Kitchen of Japan", 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, Street food culture, among other attractions. The city's main transit system is the Osaka Metro.
Osaka residents spend more on food per capita than any other city in Japan
Brazil's iconic coastal city known for Carnival. Nicknamed "The Marvelous City", Rio de Janeiro has an area of 1,221 km² and is home to 6.8 million people. The city dates back to 1565. Visitors come for Christ the Redeemer, Copacabana Beach, Carnival, and much more. Getting around is easy with the MetrôRio.
Rio's Christ the Redeemer statue is struck by lightning an average of 6 times per year
Looking beyond city limits, the Osaka metropolitan area covers 13,228 km², which is 2.0x larger than greater Rio de Janeiro at 6,744 km². The Osaka metro area is also more populous, with 19.3 million people compared to 13.5 million.
Osaka has a population density of 12,222 people per km² — an extremely dense urban environment. Rio de Janeiro, with 5,528 people per km², is a densely populated city. Osaka is noticeably denser, packing 2.2 times more people per square kilometer.
This comparison spans continents — Osaka in Asia versus Rio de Janeiro in South America. Despite the geographic distance, comparing their sizes reveals surprising insights about how cities grow worldwide.
Osaka has a humid subtropical climate while Rio de Janeiro experiences tropical savanna conditions. Winters differ dramatically: Rio de Janeiro stays around 21°C while Osaka drops to 5°C. When it's noon in Osaka, it's midnight in Rio de Janeiro — a 12-hour time difference.
Size Ratio
Osaka fits inside Rio de Janeiro ~5 times
Density Gap
Osaka is 2.2x more densely populated
Time Difference
12 hours apart
History
Osaka is ~920 years older
The straight-line distance from Osaka to Rio de Janeiro is 18,698 km (11,618 miles), with an estimated flight time of ~22h 30m. See full distance details, including timezone difference and city facts.
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