Tokyo's population is about 14 million people within the Tokyo Metropolis (Tokyo-to) as of 2025, while the surrounding Greater Tokyo Area holds roughly 37.4 million — making it the most populous metropolitan area on Earth. No single figure tells the whole story, because "Tokyo" can mean the 23 special wards at its core, the wider metropolitan prefecture, or the vast urban region that spills into neighbouring prefectures.
How the Numbers Break Down
Understanding Tokyo's population means choosing which Tokyo you mean. The 23 special wards (tokubetsu-ku) form the dense historic city and house roughly 9.7 million residents. Expand to the full Tokyo Metropolis — which also takes in 26 western cities in the Tama region, plus the remote Izu and Ogasawara islands — and the count rises to about 14 million. Widen the lens once more to the Greater Tokyo Area, adding the prefectures of Kanagawa, Saitama and Chiba, and you reach about 37.4 million.
That largest figure is staggering: it means nearly 30% of Japan's entire population lives in a region covering only around 3.5% of the country's land. No rival comes close. Greater Delhi and Greater Shanghai, the next largest urban agglomerations, each trail Tokyo by several million people.
Population Density and How Tokyo Copes
Tokyo's density is extreme by global standards. The 23 wards pack roughly 9.7 million people into about 627 square kilometres, giving a density near 15,500 people per square kilometre. Individual wards vary widely: residential Toshima averages around 23,000 people per km², while central Chiyoda — dominated by offices and the Imperial Palace grounds — falls to about 5,500.
What keeps a city this crowded liveable is its transit network, among the most efficient ever built. Trains and subways move well over 14 million passengers each day. Shinjuku Station alone handles roughly 3.5 million daily users, making it the busiest railway station in the world. The system lets millions commute into the central business wards each morning, so the daytime population of districts like Chiyoda and Chuo balloons far beyond their modest resident counts.
The 23 Special Wards
Each special ward operates as its own municipality with an elected mayor and assembly. The most populous are largely residential districts on the city's edges:
- Setagaya — about 940,000 residents, the largest ward, popular with families.
- Nerima — roughly 740,000 residents.
- Ota — roughly 740,000 residents, stretching toward Haneda Airport.
By contrast, the commercial cores hold few permanent residents but enormous daytime crowds. Chiyoda, Chuo and Minato are filled with corporate headquarters, while Shinjuku and Shibuya anchor shopping and nightlife. Taito, the smallest ward by area, preserves the historic Asakusa district and the Senso-ji temple. The result is a patchwork of distinct neighbourhoods, from the boutiques of Ginza to the electronics stalls of Akihabara.
Growth, Decline and the Aging Question
Tokyo's population history mirrors modern Japan. Millions migrated from the countryside during the postwar boom, and the metropolis swelled through the 1960s before suburban sprawl pushed many residents into neighbouring prefectures. A wave of re-urbanisation in the 2000s drew younger Japanese back toward the convenient, amenity-rich central wards.
Remarkably, Tokyo is one of the few parts of Japan still gaining residents even as the nation shrinks. Japan's total population has fallen since 2008, dipping below 124 million by 2025, yet Tokyo still attracts tens of thousands of net internal migrants each year. Even so, its growth has nearly flattened and is expected to peak around 2025–2030 before joining the national decline. Tokyo's fertility rate of roughly 1.04 is the lowest of any Japanese prefecture, far below the 2.1 needed to sustain a population without migration.
Who Lives in Tokyo
Tokyo's residents are about 96% Japanese, but the city has grown steadily more international. The foreign-resident population has reached around 620,000, with the largest communities arriving from China, South Korea, Vietnam, the Philippines and Nepal. Neighbourhoods such as Shin-Okubo, often called Tokyo's Koreatown, reflect this diversity. The age structure shows Japan's broader aging trend: roughly 23% of residents are 65 or older, slightly below the national average of about 29%, with a median age near 45. Tokyo also stands out for its single-person households, which make up close to half of all homes, driven by later marriage, high living costs and shifting social norms.
Frequently Asked Questions
What is the population of Tokyo in 2025?
The Tokyo Metropolis has about 14 million residents in 2025. The 23 special wards at its core hold around 9.7 million, and the wider Greater Tokyo Area reaches roughly 37.4 million.
Is Tokyo the biggest city in the world?
By metropolitan area, yes. The Greater Tokyo Area is the most populous urban region on the planet, ahead of Delhi and Shanghai. By city-proper boundaries, however, some cities rank higher depending on how limits are drawn.
Why is Tokyo so densely populated?
Tokyo concentrates Japan's jobs, government and culture in a relatively small habitable area. A world-class rail network makes it possible to live and work at densities exceeding 15,000 people per square kilometre in the central wards.
Is Tokyo's population growing or shrinking?
It is still growing slightly, mainly through migration from other prefectures, but growth has nearly stalled and is forecast to peak by around 2030. With a fertility rate near 1.04, Tokyo is expected to begin declining thereafter, in line with Japan as a whole.
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