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Vietnam
Japan
Area Comparison
Hanoi is 14.9x larger than Osaka
Population Comparison
Hanoi has 2.9x more people than Osaka
Yes — Hanoi is 14.9x larger than Osaka by area. Hanoi spans 3,359 km² (1,297 mi²) while Osaka covers 225 km² (87 mi²) — a difference of 3,134 km². You could fit Osaka inside Hanoi approximately 14 times.
To put Hanoi's size in perspective, its area of 3,359 km² is about 1.2x smaller than Rhode Island. Meanwhile, Osaka at 225 km² is roughly the same size as Amsterdam.
Vietnam's capital with over a thousand years of history. Known as "The City of the Ascending Dragon", Hanoi covers 3,359 km² with a population of 8.1 million. The city was established in 1010. Hanoi is known for Hoàn Kiếm Lake, Old Quarter (36 Streets), Ho Chi Minh Mausoleum, among other attractions. The city's main transit system is the Hanoi Metro.
Hanoi's Old Quarter has been a trading hub for nearly 1,000 years, with each street historically dedicated to a specific trade
Japan's third-largest city and a culinary capital. Nicknamed "The Kitchen of Japan", Osaka has an area of 225 km² and is home to 2.8 million people. It was established in 645. Visitors come for Osaka Castle, Dotonbori district, Street food culture, and much more. Getting around is easy with the Osaka Metro.
Osaka residents spend more on food per capita than any other city in Japan
Looking beyond city limits, the Osaka metropolitan area covers 13,228 km², which is 3.9x larger than greater Hanoi at 3,359 km². The Osaka metro area is also more populous, with 19.3 million people compared to 8.1 million.
Hanoi has a population density of 2,397 people per km² — a moderately dense city. Osaka, with 12,222 people per km², is an extremely dense urban environment. Osaka is dramatically more crowded, with 5.1x the population density.
Both cities are in Asia, but they represent different national approaches to urban development. Hanoi (Vietnam) and Osaka (Japan) offer a fascinating regional contrast.
Both cities share a humid subtropical climate, though local geography creates distinct microclimates in each. When it's noon in Osaka, it's 10:00 AM in Hanoi — a 2-hour time difference.
Size Ratio
Osaka fits inside Hanoi ~14 times
Density Gap
Osaka is 5.1x more densely populated
History
Osaka is ~365 years older
The straight-line distance from Hanoi to Osaka is 3,271 km (2,032 miles), with an estimated flight time of ~4h 21m. See full distance details, including timezone difference and city facts.
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