Why does my elevator go 1, 2, 3, F, 5? Because four is skipped on purpose. In Korean, four is sa (사) — pronounced exactly like sa (死), the Sino-Korean word for death — so hospitals, hotels, and apartment blocks quietly relabel the fourth floor instead of printing it.
I’d actually given someone the wrong explanation for this once — “some old superstition, don’t worry about it” — long before I ever bothered to check whether that was true. It took an elevator maintenance notice taped up in our lobby last month, listing every floor by number except the one that’s actually skipped, for me to stop and finally look it up properly. I build systems for a living — I like things to have a reason — and what I found was more specific than the vague “old superstition” I’d been repeating for years.
Where Does the Sa = Death Coincidence Come From?
Korean uses two number systems side by side. There’s a native Korean set (hana, dul, set…) for counting people or objects, and a separate Sino-Korean set (il, i, sam, sa…) borrowed from Chinese characters, used for dates, money, and floor numbers. Four in that second set is sa (사) — and it happens to share its sound with the Sino-Korean reading of the character 死, meaning death.
Two completely different words, one identical syllable.
That’s it.
That’s the whole myth. There’s no ghost story attached, no ancient curse — just a phonetic accident that landed on a number people now go out of their way to avoid, especially in places where death is already an uncomfortably close neighbor. The fear even has a name for it: tetraphobia, literally “fear of four,” borrowed from Greek rather than Korean.
Where Korea Takes It Most Seriously
Hospitals are the strictest of all, along with hotels and apartment blocks — the exact places where a resident, patient, or guest might be filling out paperwork about a death, or simply doesn’t want to be reminded of one while lying in a hospital bed. In my own building, the panel reads 1, 2, 3, F, 5, 6, and as far as I can tell, nobody here has ever brought it up, because after a while you stop seeing the gap entirely. That’s actually what got me — not that the superstition exists, but that I’d ridden past it for two years without registering it once.
It isn’t a law. Plenty of newer buildings print a plain “4” without a second thought, and nobody gets fined for it. It’s more of a soft, inherited habit — the kind of thing a building manager does automatically, the same way you might avoid stepping on a crack out of a reflex you can’t fully explain.
It’s Not Just Elevators: Cash Gifts and the Number Four
The avoidance follows people out of the building, too. I’ve actually written about this before — in a piece on chukuigeum (축의금, the cash gift you hand over at a Korean wedding), I mentioned the unspoken rule against giving 40,000 won without explaining where it came from. Here’s the reason: 40,000 is a multiple of the same unlucky four, so people round up to 50,000 won or down to 30,000 instead, whether it’s a wedding, a birthday, or a housewarming gift.
Nobody sits you down and teaches you this rule. You just absorb it, the way you absorb which side of the escalator to stand on, and one day you’re the one nudging a friend away from a “round number” that happens to land on 40,000.
Is This a Korea-Only Thing, or All of East Asia?
It’s related across the region but not identical in scope. China’s avoidance of four is the broadest of the three — it shows up in building floor numbers, license plates, and product naming, though government and military hardware can still use the number freely when it’s convenient. Japan’s version runs on the same homophone logic (shi covers both “four” and “death”), which is exactly why it extends further, into combinations like 49 that read as doubly unlucky. Korea’s version is narrower than either — concentrated mostly in hospitals, funeral-adjacent spaces, and elevator panels, rather than applied as a blanket rule across every industry.
| Country | How the taboo shows up | How far it reaches |
|---|---|---|
| Korea | F instead of 4 on elevators; avoided in gift amounts | Narrow — hospitals, funeral-adjacent spaces, elevators |
| China | Skipped in floors, license plates, product names | Broadest — though government/military use can override it |
| Japan | Same homophone logic (shi), extends to combos like 49 | Wider — unlucky number combinations, not just standalone 4 |
Quick Questions About Korea’s Number-4 Taboo
Do all Korean buildings skip the fourth floor?
No. It’s common, especially in hospitals, hotels, and apartment blocks, but there’s no requirement — plenty of buildings still print a plain 4 without any issue.
Is it really bad to give 40,000 won as a gift in Korea?
Many people avoid it for exactly this reason. Rounding up to 50,000 won or down to 30,000 won is the common workaround for weddings, birthdays, and similar cash gifts.
Is Korea’s number-4 avoidance the same as China’s or Japan’s?
Related, not identical. China’s avoidance is broader and shows up in more places; Japan’s extends to specific unlucky combinations like 49; Korea’s stays fairly concentrated around hospitals, funerals, and elevators.
Do I Still Flinch at a Four? Kind of, Yes.
Here’s the part I didn’t expect to admit when I started looking into this. I know, intellectually, that it’s just language — a coincidence of pronunciation with zero supernatural weight behind it. And yet if I’m handing someone an envelope and the amount lands on a 4, I still hesitate for half a second before deciding it’s fine. Knowing exactly how a superstition works apparently isn’t the same as being immune to it.
I’ve stopped giving that kind of non-answer since. If someone asks me something and I don’t actually know, I’d rather say so and go find out than fill the gap with something vague and half-true.