I was lying in the dry yellowing grass of Yoyogi Park on a crisp winter morning, trying to find some distance from the city, when a voice blasted out of hidden speakers. It gave a prolonged, severe reminder of the sanctions awaiting anyone who plays ball games or fails to keep their dog leashed. The message then repeated in English. 

Yoyogi is one of Tokyo’s few large parks that is free to enter, and it has the most lenient rules in the city. Even so, its wide concreted walkways, signs warning you off the grass, and prohibition of running clockwise make it feel less like a place to be than a place to pass through.

In 1989, the American sociologist Ray Oldenburg coined the term “third place”: somewhere that is neither home nor work, where people gather informally, without purpose or agenda. He argued that civil society emerges from association of equals in spaces like these; free, open, and unstructured. Tokyo has almost none of these third places. What it has instead is an extraordinarily dense infrastructure of commercial social spaces – karaoke boxes, manga cafes, izakayas, family restaurants – all of which gate access through consumption. 

Tokyo provides roughly 2 square meters of publicly accessible green space per person, comfortably below the WHO’s recommended minimum of 9 sq m. Canberra, the world leader, offers 420 sq m. Glasgow, not a city known for visionary urban planning, manages around 38 sq m. Even London, which is not considered a very green city, offers 15.

But the gap is qualitative as much as quantitative. I spent most of March in Paris, also a densely populated city with under the recommended 9 sq m of green space per capita. Yet, it is used (along with all other public space) with enormous freedom: picnics on the grass, petanque in the squares, cafes spilling onto sidewalks where you can sit all afternoon on a single espresso. With benches every hundred meters, the streets don’t hurry you, allowing almost anywhere to become a third place.

On my way to Europe, I had a layover in Hanoi. The whole city seemed to be a third place. Pavements were crowded with people of all ages on little plastic chairs, smoking, drinking, talking. Vietnam’s comparatively low GDP and development trajectory does not exactly prioritize expensively designed urban community space, and yet in a trend I have seen across the Global South, looser regulation on the use of public space lets the human instincts for connection and association come through unimpeded.

A third place, it turns out, does not require much. It just requires permission to be there.

So, why is Tokyo different? 

Part of the answer is economic. Where postwar American and British cities sprawled outward into low-density suburbs, Tokyo grew while remaining extraordinarily dense, keeping central land prices high and the opportunity cost of open space enormous. At its peak in around 1990, the Imperial Palace grounds were valued higher than all the real estate in California. Prices have since come down, but the logic persists: every meter that could be a park is a meter that could better earn its keep as a convenience store, a pachinko parlor, or an apartment block.

Unlike British cities, which inherited large Victorian-era parks that would now be politically suicidal to sell off, Tokyo never had much public green space to begin with. Major parks, Ueno, Shinjuku Gyoen, and the imperial gardens are repurposed aristocratic estates, not purpose-built civic amenities. The city’s baseline of green space was always low, and the land economics have ensured it stayed that way.

Another difference is a lack regulatory counterweight to the market forces. Japanese urban zoning is surprisingly permissive about mixed use and does not mandate public open space in the way European planning frameworks do. In London, developers are typically required to include public realm or green space as a condition of planning permission. In Tokyo, the equivalent mechanisms are far weaker. Developers sometimes provide small plazas at the base of office towers – you see them in Marunouchi and Roppongi Hills – but these are privately owned and managed, often with rules that discourage lingering or eating. They are public in the sense that you can walk through them, but not in the sense that you can use them.

Culture also plays a role. The concept of meiwaku (迷惑), the deeply held norm against causing inconvenience to others, governs how shared space is used. In Tokyo’s parks, it manifests as a long list of prohibitions: against ball games, dancing, loud conversation, and in some wards, even practicing comedy routines. Chiyoda Ward has reportedly required supervisors to be present for activities as basic as playing catch. The result is that public space becomes space where the default behavior is to minimize your footprint. 

None of this would matter much if the consequences were limited to recreation. They are not. A 2025 Cabinet Office survey found that nearly half of Japanese nationals have experienced loneliness or isolation. An estimated 1.46 million people are hikikomori, withdrawn from society for six months or more, a phenomenon concentrated overwhelmingly in cities. Births fell below 700,000 for the first time in 2024 with Tokyo’s fertility rate dropping to a record low of 1.15.

And as summers grow ever hotter, Japan has broken its heat record three years running. The scarcity of green space is a public health risk in its own right. 

These social crises are typically treated as separate policy problems. But they may share a common thread: the absence of incidental sociality; the unplanned, unpurchased encounters that happen when people share space without a commercial reason to be there.

A city with generous, free public space provides gentle on-ramps to social life. A bench. A kick-about. A stranger nearby. Tokyo, for all its density and brilliance, has structurally ruled that possibility almost entirely out of daily life. The jump from private seclusion to social participation requires becoming a consumer first, and for the lonely, the withdrawn, or the broke, that threshold may be too high.

Parks do not cause marriages or cure isolation. But when every encounter requires a transaction, some encounters never happen at all.