Tetraphobia: how fear of 4 reshapes buildings and brands
What tetraphobia is
Tetraphobia — from the Greek for "four" and "fear" — is the practice of avoiding the digit 4. It is strongest in East Asia, where the word for four sounds like the word for death: sì and sǐ in Mandarin, sei in Cantonese, shi in Japanese and sa in Korean. The resemblance is close enough that in everyday life many people simply prefer not to say it, display it or give gifts in fours.
It is often compared to the Western unease with 13, but in the markets where it applies it is broader. Thirteen is mostly about floors and dates; four touches phone numbers, plates, addresses, room numbers, table numbers, prices and product names.
Where you can see it
- Buildings. Many residential towers in Hong Kong and mainland China skip floors 4, 14, 24 and so on. Some go further — a tower whose 39th floor is directly below its 50th is a well-known sight. Critics note this conveniently makes upper floors, which sell for more, look even higher.
- Hospitals. In Japan and South Korea, room and floor 4 are frequently absent in hospitals and funeral settings.
- Vehicles and plates. Licence plates containing 4 are less desirable in Chinese-speaking markets, and some authorities have stopped issuing certain combinations.
- Products. Technology companies selling into Asia have historically skipped "4" in model series. Navies in Taiwan and South Korea have avoided 4 in ship pennant numbers.
- Japan's extra number. In Japanese, 9 (ku) echoes "suffering", and 49 is especially unwelcome because it evokes "suffer until death".
When 4 is fine — or even good
Context changes everything. In the popular love code 1314, read yī shēng yī shì, the 4 stands for 世, "lifetime" — and the sequence means "for a whole lifetime". Governments and militaries in China use 4 freely in official designations. In much of the West, four suggests stability and completeness: four seasons, four directions, a four-leaf clover. In Western numerology it is the builder's number.
And low numbers can override superstition entirely. In Australia, a single-digit plate "4" reportedly sold for around US$1.6 million — scarcity beat symbolism.
The business cost
For numbered assets the effect is measurable. Domain dealers commonly report that a 4 in an otherwise attractive numeric domain can cut its value dramatically for Chinese buyers. Phone numbers and plates follow the same logic. Property prices on "4" floors, where they still exist, can lag.
For consumer brands the risk is subtler: an awkward number in a product name, price or launch date rarely causes a scandal, but it can reduce appeal in exactly the markets you are trying to win.
How to handle 4 in practice
- Know your buyer. If your customers are mostly Western, Indian or Gulf-based, 4 usually does not matter — memorability matters more.
- Avoid it at the end. The final digit of a price or phone number is read first and remembered longest.
- Reframe deliberately when you can't avoid it. The 世/事 reading ("generation", "matters") is a legitimate positive frame, used in phrases people already know.
- Localise per market. Treat numbers like translations: different SKUs, prices or hotlines for different regions are normal practice.
Check your numbers with the Lucky Number Analyzer — it flags 4s, the avoided combinations 14, 24, 74 and 49, and the positive phrases that can rescue them.
Sources: Wikipedia, "Tetraphobia"; Zolima CityMag on Hong Kong numerology; HowStuffWorks; The Drive (NSW plate sale); domain-market commentary from Exabytes.