Buenos Aires
203 km²
Tokyo
2,194 km²
Argentina
Japan
Area Comparison
Buenos Aires is 10.8x smaller than Tokyo
Population Comparison
Buenos Aires has 4.6x fewer people than Tokyo
Tokyo is significantly larger, covering 10.8 times the area of Buenos Aires. Tokyo spans 2,194 km² (847 mi²) while Buenos Aires covers 203 km² (78 mi²) — a difference of 1,991 km². You could fit Buenos Aires inside Tokyo approximately 10 times.
To put Buenos Aires's size in perspective, its area of 203 km² is roughly the same size as Amsterdam. Meanwhile, Tokyo at 2,194 km² is about 1.1x smaller than Moscow.
Picture Buenos Aires another way: its area is large enough to fit about 28,000 American football fields, 100 times the area of Monaco, or 60 times the area of Central Park. Tokyo, by comparison, equals about 307,000 American football fields, 37 times the area of Manhattan, or 21 times the area of Paris.
Buenos Aires, officially the Autonomous City of Buenos Aires, is the capital and largest city of Argentina. It is located on the southwest of the Río de la Plata. Buenos Aires is classified as an Alpha− global city, according to the GaWC 2024 ranking. The city proper has a population of 3.1 million and its urban area has a population of 16.7 million, making it the 21st most populous metropolitan area in the world.
Known as "Paris of South America", Buenos Aires covers 203 km² with a population of 3.1 million. The city was established in 1536. Buenos Aires is known for La Boca's Caminito, Recoleta Cemetery, Teatro Colón, among other attractions. The city's main transit system is the Buenos Aires Subte.
Buenos Aires is classified as an Alpha− global city according to the GaWC 2024 ranking.
Tokyo, officially the Tokyo Metropolis, is the capital and most populous city of Japan. With a population of over 14 million in the city proper in 2023, it is one of the most populous urban areas in the world. The Greater Tokyo Area, which includes Tokyo and parts of six neighboring prefectures, is the most populous metropolitan area in the world, with 41 million residents as of 2024.
Also known as "Eastern Capital", Tokyo has an area of 2,194 km² and is home to 14.0 million people. Its history stretches back to 1457. Visitors come for Shibuya Crossing, Tokyo Tower, Imperial Palace, and much more. Getting around is easy with the Tokyo Metro & JR East.
Greater Tokyo holds 41 million residents as of 2024, making it the most populous metropolitan area on Earth.
Looking beyond city limits, the Tokyo metropolitan area covers 13,572 km², which is 2.9x larger than greater Buenos Aires at 4,758 km². The Tokyo metro area is also more populous, with 37.4 million people compared to 15.2 million.
Buenos Aires has a population density of 15,074 people per km² — an extremely dense urban environment. Tokyo, with 6,363 people per km², is a densely populated city. Buenos Aires is noticeably denser, packing 2.4 times more people per square kilometer.
This comparison spans continents — Buenos Aires in South America versus Tokyo in Asia. Despite the geographic distance, comparing their sizes reveals surprising insights about how cities grow worldwide.
Both cities share a humid subtropical climate, though local geography creates distinct microclimates in each. When it's noon in Tokyo, it's midnight in Buenos Aires — a 12-hour time difference.
Size Ratio
Buenos Aires fits inside Tokyo ~10 times
Density Gap
Buenos Aires is 2.4x more densely populated
Time Difference
12 hours apart
Buenos Aires covers 203 km². Cities with a similar urban footprint include Helsinki (214 km²), Amsterdam (219 km²), Stockholm (188 km²), Osaka (225 km²), or Boston (232 km²).
Tokyo covers 2,194 km². Cities with a similar urban footprint include Ho Chi Minh City (2,061 km²), Shenzhen (1,997 km²), Cape Town (2,455 km²), Moscow (2,511 km²), or Lima (2,672 km²).
The straight-line distance from Buenos Aires to Tokyo is 18,373 km (11,417 miles), with an estimated flight time of ~22h 7m.
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