Why Do Tokyo Road Cars and Traffic Move on the Left? The History Behind Japan's Driving Side

You glance both ways before crossing a Tokyo street, and the taxis blur past from the right. It feels backward—until you realize it's the rest of the world that switched lanes.

The samurai who never met a steering wheel

Japan's left-side tradition didn't start with cars. It began centuries earlier, when samurai walked the roads of Edo-period Japan with their katana slung on the left hip. Passing someone on the right meant your sword hilts might clash—a gesture that could spark a duel. So people naturally drifted left, keeping their right hands free and their blades safely apart.

The unwritten rule became the path of least bloodshed.

When the rails made it official

By the time Japan's first railways appeared in the 1870s, British engineers were building the tracks. Britain had already committed to left-side rail traffic, and Japan followed suit—not out of colonial pressure, but practical partnership. The trains ran left. The trams ran left. And when the first automobiles arrived in the early 1900s, they simply joined the flow.

In 1924, Tokyo made it law.

Left wasn't a choice Japan made for cars—it was a choice cars made to fit Japan.

The year the world almost switched

Here's the strange part: Japan nearly wasn't alone. Many countries drove on the left until the mid-20th century. But as American cars—designed for right-side driving—flooded global markets after World War II, nation after nation switched. Sweden flipped in 1967. Iceland in 1968. Even parts of Austria and Czechoslovakia changed sides.

Japan didn't.

The infrastructure was already too embedded, the roads too narrow, the investment too steep. And perhaps there was something else—a quiet resistance to changing what had worked for generations simply because another country did it differently.

What it feels like today

Step off a plane at Narita, and the first thing that disorients you isn't the language—it's the taxi door that swings open by itself from the left side, operated by a driver in white gloves sitting on the right. The buses lean the opposite way around corners. Escalator etiquette flips (stand left, walk right in Tokyo). Even the vending machines seem to face a different logic.

But within a day, you stop noticing.

You adjust to the rhythm of pedestrians flowing left on station platforms, of cars yielding with a patience that feels choreographed. The "backward" roads reveal themselves as simply different—a reminder that efficiency has many shapes, and tradition isn't the same as stubbornness.

The countries that stayed

Japan isn't isolated in this. The UK, Australia, India, Thailand, Indonesia—about 75 countries, representing a third of the world's population, still drive on the left. It's less a quirk than a parallel system, equally logical, equally safe.

And in Japan's case, it's also a thread that connects the modern Shuto Expressway to the samurai footpaths of four centuries ago.

The cars changed. The roads changed. The side of the street didn't need to.

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