Lately, I’ve found myself thinking about a place I’ve never been—the Strait of Hormuz.
On a map, it’s easy to miss, just a narrow stretch of water between Iran and Oman. But over the past few weeks, as tensions in the region picked up, it started to feel less distant—not because of the politics itself, but because of what moves through it every day. A large share of the oil and liquefied natural gas that powers countries like Japan passes through that single route, with tankers moving steadily through a confined space carrying the energy behind everyday life: electricity, transport, manufacturing, and data.
It made me pause, because we don’t usually think about energy in such physical terms. It’s just there. You flip a switch, charge your phone, take a train. The system feels stable because most of the time it is, but that stability depends on supply chains that stretch far beyond Japan’s borders. When a route like Hormuz starts to feel uncertain, that distance collapses.
Japan has built an economy that runs on imported energy. It’s efficient and has supported decades of growth, but it also means that events thousands of kilometers away don’t stay remote for long. They show up quietly—in higher costs, in tighter supply, in decisions that shift direction without much visibility.
Around the same time these concerns were resurfacing, a reactor at the Kashiwazaki-Kariwa Nuclear Power Plant returned to commercial operation. It wasn’t a major headline or a dramatic moment, just a restart. But in the context of a chokepoint like Hormuz, it represents something very practical: energy that doesn’t have to pass through it at all.
A nuclear plant operates differently from imported fuel flows. The fuel is already on site, and once running, it produces electricity continuously for months, largely insulated from day-to-day disruptions in global shipping routes. It doesn’t solve everything, but it does change something fundamental. A portion of the system is no longer tied to whether tankers can move freely through a narrow stretch of water, and even a partial shift reduces how much needs to pass through that route, and with it, the risk.
That difference becomes clearer when you stop thinking in terms of policy and start thinking in terms of geography. Energy discussions often stay abstract—targets, technologies, percentages—but the system itself is physical. It depends on routes, infrastructure, and the movement of resources across long distances. The Strait of Hormuz is one of those points where everything converges—a narrow passage that fades into the background under normal conditions, but comes into focus when those conditions change.
What stayed with me wasn’t the politics of the region, but the realization that part of Japan’s energy security is effectively routed through a single, distant corridor. Once you see it that way, it becomes harder to ignore what nuclear energy actually offers—not as a theory or a talking point, but as something concrete. It is energy that does not depend on constant movement across oceans, is far less exposed to distant conflict or narrow sea lanes, and sits inside the system rather than outside of it.
Japan will always rely on multiple sources of energy. That’s reality. But the question feels different when you look at it this way. It’s not just about diversifying supply; it’s about how much of the system we are willing to leave exposed. Because once a line on a map starts to feel like a constraint, bringing part of that system back under your own control stops sounding optional. It starts to feel necessary.