Tokyo History Facts: 20 Things That Made the City

Stand at Nihonbashi bridge and you are standing at kilometer zero, the point every road in Japan was once measured from. Four hundred years ago this was a marshy castle town called Edo. Two hundred years ago it was probably the largest city on earth. Twice in the last century it was flattened, once by an earthquake and once by fire dropped from the sky, and twice it was rebuilt bigger than before.

Tokyo's history is the short version of Japan's: a fishing village that became a shogun's capital in 1603, took the emperor and a new name in 1868, and turned into the world's third-largest urban area. Here are 20 facts that explain how it happened, and what's left to see.

1. Tokyo was called Edo until 1868

Tokugawa Ieyasu set up his shogunate at Edo in 1603, and for the next 260 years Japan was run from here while the emperor stayed in Kyoto. That ended with the Meiji Restoration in 1868. The emperor moved east and the city took the name Tokyo, meaning "eastern capital," according to the Tokyo Metropolitan Government.

You can still trace the old city. The Imperial Palace sits on Edo Castle's foundations, and neighborhoods like Yanaka and Kagurazaka kept the street pattern. Our guide to Tokyo's old Edo neighborhoods maps the ones worth walking.

2. Edo passed one million people before London did

By the middle of the 18th century Edo held more than a million residents, which made it one of the largest cities in the world at the time. Samurai households, the merchants who supplied them and the labor that rebuilt the city after its frequent fires all packed into a tight grid of wooden buildings.

3. Fire shaped Edo more than any other force

Edo burned so regularly that residents called the blazes "the flowers of Edo." The Great Meireki Fire of 1657 destroyed most of the city and killed tens of thousands, and the rebuilding that followed widened streets and pushed temples out to the edges.

That cycle explains why so little wooden Edo survives. What you see today in Asakusa or around the palace is mostly 20th-century reconstruction on much older ground.

4. The 1923 earthquake killed more than 140,000 people

The Great Kanto Earthquake struck in September 1923. More than 140,000 people were killed or went missing and some 300,000 houses were destroyed, per the Tokyo Metropolitan Government's own history of the city. Most of that destruction came from the fires that followed the shaking, not the collapse itself.

Modern Minato ward, rebuilt on ground that has burned and fallen twice in a century

The rebuilding that followed set the pattern Tokyo still uses: wide firebreak avenues and reinforced concrete, then some of the strictest seismic codes in the world.

5. Tokyo was bombed 102 times in World War II

The heaviest raid came on the night of March 10, 1945, when firebombs destroyed a huge swath of the low-lying east side. By October 1945 the city's population had fallen to 3.49 million, roughly half what it was in 1940.

6. The 23 special wards were created in 1947

Tokyo's odd status, a prefecture that behaves like a city, dates to the postwar reorganization. The 23 special wards took their current shape in August 1947, each with its own mayor and assembly.

7. Tokyo has 14.3 million residents today

The Tokyo Metropolitan Government's estimate for August 2026 puts the population at 14,303,513 across 2,194 square kilometers. The city passed 10 million in 1962 and 14 million in 2019.

Minato ward at night, part of a metropolis of 14.3 million people

Density works out to about 6,500 people per square kilometer across the whole prefecture, which includes mountains and islands. In the 23 wards it is far higher.

8. Greater Tokyo is the world's third-largest urban area

Tokyo held the title of the world's most populous urban area for decades, but the UN's World Urbanization Prospects 2025 now ranks it third at 33.4 million, behind Jakarta at 41.9 million and Dhaka at 36.6 million. Tokyo isn't shrinking dramatically so much as the others are growing fast.

9. The 1964 Olympics rebuilt the city again

Tokyo hosted the Summer Olympics in October 1964, the first held in Asia. The deadline drove a decade of construction into a few years: the Tokaido Shinkansen opened days before the games, along with new expressways, the monorail to Haneda and the subway lines that still carry the most traffic.

Yoyogi National Gymnasium, with its sweeping suspended roof, is the piece most worth going to see. It was designed by Kenzo Tange and still hosts events.

10. Tokyo Tower was built to prove the country was back

Tokyo Tower opened in December 1958 as a broadcasting antenna, 333 meters tall and painted orange and white for aviation safety. It went up 13 years after the firebombing, and it was deliberately taller than the Eiffel Tower.

11. Tokyo Skytree's height is a pun

At 634 meters, the Skytree is the tallest tower in the world. The number was chosen because 6-3-4 can be read mu-sa-shi, the name of the old province that covered this part of the Kanto plain.

12. Shinjuku Station handles 2.7 million passengers a day

Shinjuku Station opened in 1885 as a quiet stop on the line between Akabane and Shinagawa. It now holds the Guinness World Record as the busiest station on earth, with an average of 2,704,703 passengers a day in 2022.

Rush hour on the Yamanote Line, the loop that ties Tokyo's main stations together

More than a dozen JR, private and subway lines meet here, spread across dozens of platforms and more than 200 exits. That is why locals give directions by exit number rather than street name. The complex straddles the boundary between Shinjuku ward and Shibuya ward.

13. The world's biggest fish market moved in 2018

The wholesale market that made Tsukiji famous closed in October 2018 and reopened at Toyosu, on reclaimed land about two kilometers away. Toyosu is nearly twice the size and now handles the tuna auctions.

What stayed behind is the Tsukiji Outer Market, the retail lanes of knife shops, tamagoyaki stalls and sushi counters. Our comparison of Tsukiji and Toyosu markets lays out what each one is good for.

Either one is the fastest way into Japan's food culture. Go hungry and early, and bring cash for the stalls that still refuse cards.

14. Japan's oldest company was founded in 578

Kongō Gumi began building temples in 578 and ran as a family business for more than 1,400 years, which makes it the world's oldest documented company. Its defining work is Shitennō-ji in Osaka, finished in 593 and rebuilt seven times since.

Todai-ji in Nara, an example of the temple carpentry tradition Kongō Gumi worked in

The firm is based in Osaka rather than Tokyo, and it lost its independence in 2006, when it became a subsidiary of the Takamatsu Construction Group. The craft survived even though the family business did not.

Temple carpenters still work this way, cutting joints that hold without nails. You can watch the results up close on a temple tour in Nara.

15. Capsule hotels started as a place to sleep off a missed train

The first capsule hotel opened in Osaka in 1979, designed by the architect Kisho Kurokawa for businessmen who had missed the last train home. Tokyo took the idea and ran with it, and the pods are now a normal budget option for travelers as well.

A capsule hotel corridor, with pods stacked two high along each wall

Expect ¥3,000 to ¥6,000 a night in central Tokyo, a shared bath, and a locker for your luggage rather than space in the pod.

16. Blue platform lights were installed to prevent suicides

JR East fitted blue LED panels at the end of platforms on all 29 Yamanote Line stations in 2009. A study across 71 stations found station suicides fell sharply where the lights were installed, and other operators have copied the idea since.

A blue platform lamp, installed at Tokyo stations as a suicide-prevention measure

17. There are roughly four million vending machines in Japan

Industry figures put the national total near four million, about 2.2 million of them for drinks, and Tokyo's density of machines is the highest you'll see anywhere. The reason is practical: low vandalism, high land costs and a cash-friendly culture that made unattended retail work.

Vending machines under the cherry trees, a normal sight in Tokyo parks

Most sell hot and cold drinks. The novelty machines selling soup stock or fresh eggs exist, but they're a lot rarer than the internet suggests.

18. Hanami in Tokyo dates back to the Edo period

Public cherry blossom viewing became a city-wide habit under the shoguns, who planted trees along the Sumida River for ordinary people to enjoy. Ueno Park, laid out on the grounds of a former temple complex, now has about 800 Somei-yoshino cherry trees.

Night blossoms along the Meguro River, one of Tokyo's busiest hanami spots

Timing shifts every year. Tokyo's trees flowered on March 19 in 2026 and hit full bloom on March 28, and our Tokyo cherry blossom guide tracks the usual windows and the best parks for each.

19. Harajuku's street style grew out of a postwar American neighborhood

Harajuku sat next to Washington Heights, US military housing built after the war on what is now Yoyogi Park. The shops that opened to serve that community seeded the district's taste for imported and remixed fashion, and Takeshita Street still runs on it.

The mirrored entrance at Tokyu Plaza Omotesando, at the top of Harajuku's main crossing

20. Tokyo builds its future the way it rebuilt its past

The city that rebuilt itself twice now tests robots at hotel reception desks and runs its trains to the second. It also holds more Michelin stars than Paris and New York combined, with 160 starred restaurants in the 2026 guide.

Robot check-in, one of the experiments Tokyo hotels have run since 2015

Anime and manga sit in the same story. Akihabara began as a postwar market for radio parts and became the country's electronics district.

It is now the otaku capital instead. That is roughly how Tokyo has always worked. Whatever the city is selling, it sells it on the same few blocks.

Where to see Tokyo's history for yourself

Start at the Imperial Palace East Gardens for Edo Castle's stone keep, then walk to Nihonbashi for the road marker. Asakusa gives you the temple town, Yanaka the surviving prewar lanes, and the Edo-Tokyo Museum the whole arc in one building.

Give yourself a week if you want all of it plus the modern city. This plan for seven days in the capital covers the historic core along with the neighborhoods.

Traveling with children changes the order but not the list. Our guide to Tokyo with kids has the family version of the same city.

One more piece of history sits across the water in Chiba. Tokyo Disneyland opened in 1983 as the first Disney park built outside the United States.