I'd Pressed This Button a Dozen Times Before I Actually Looked at It
I was staying in a serviced apartment in Mapo for two weeks before I noticed anything strange about the elevator. My floor was five, so every single day I stepped in, pressed the same button, and rode up without a second thought. It wasn't until a friend visiting from out of town pointed at the panel and asked, "wait, where's four?" that I actually looked down instead of just reaching for muscle memory.
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| I'd pressed this exact panel a dozen times before I actually looked at it. |
Sure enough: 1, 2, 3, F, 5, 6. Not a broken panel. Not a typo. An entire floor quietly relabeled with a letter, sitting right there in plain sight, and I'd walked past it so many times I'd stopped seeing it at all.
The Reason Comes Down to a Single Sound
The number four in Korean, sa, is pronounced identically to the Sino-Korean word for death, also sa, written with a different character but landing on the exact same syllable in speech. There's no ambiguity or accent-dependent overlap involved. In everyday conversation, the two words sound completely indistinguishable.
That kind of direct linguistic collision is rare enough that it built its own name: tetraphobia, the avoidance of the number four. It's not unique to Korea. Japan carries a version of the same superstition through its own reading of four as shi, and Mandarin Chinese has si for both four and death. But Korea's take on it is the one that got poured directly into concrete, one elevator panel at a time.
Hospitals Take It the Most Seriously
Once I started paying attention, I realized the pattern wasn't consistent everywhere, and that inconsistency was its own kind of clue. Ordinary office buildings sometimes print a normal 4 without a second thought. Hospitals almost never do.
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| Hospitals take this more seriously than almost any other building type. |
It makes a certain grim sense once you think about it for more than a second. A building already full of people confronting illness is the last place anyone wants a death-adjacent number staring back at them from a wall directory. Many Korean hospitals skip the fourth floor from patient wards entirely, and some go a step further, avoiding room numbers that simply end in four on every single floor, not just the fourth one.
I asked a nurse about it once, half expecting her to laugh it off as an old habit nobody actually believes anymore. She didn't. She just shrugged and said patients get uncomfortable, so why give them a reason to.
It Doesn't Stop at the Elevator
The avoidance spreads well past floor numbers once you start looking for it. Apartment buildings and hotels frequently skip room numbers in the 4 series the same way, so a hallway can run 301, 302, 303, straight to 501, with an entire block of numbers simply missing from existence on paper. Some newer buildings skip printing anything at all where the button would go, leaving a blank gap that trips up first-time visitors even harder than the F does.
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| Once you notice it in one hallway, you start seeing it everywhere. |
The pattern shows up in smaller, stranger corners too. Gift-giving traditions lean away from grouping items in fours. Some people avoid scheduling major events, like a wedding date, on the fourth day of a month if they have any flexibility at all. There's even a documented case in Korea's own navy: a ship slated for the hull number 560 sparked internal debate specifically because officials didn't want anything in the sequence touching a 4.
A Superstition That's Already Loosening Its Grip
None of this is enforced by any law, and the practice has genuinely started softening in newer construction. Plenty of buildings built in the last several years, especially outside hospitals, print a completely ordinary 4 on the panel without any workaround at all. The habit is strongest in older buildings and in anything connected to health, and weakest in glass office towers built in the last decade.
What stays consistent is the explanation. Ask almost anyone in Korea why the elevator skips to F, and you'll get a clear, almost cheerful answer within seconds. Nobody's confused about the reason. The superstition survives less because people believe a floor number can genuinely cause harm, and more because changing a habit that costs nothing to keep just never became a priority for anyone involved.
Here's what stuck with me most: once you spot it in one elevator, you start seeing the gap everywhere, hotel directories, hospital wards, apartment hallways, until a missing digit stops looking like an error and starts looking like the most honest thing in the building.
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