Keycap: 4 Emoji

The number four keycap (4️⃣) — an ordinary digit with an extraordinary cultural burden. In China, Japan, Korea, and Vietnam, 4 is the unlucky number. The Chinese word for four (四, sì) sounds nearly identical to the word for death (死, sǐ). The same is true in Japanese (shi, 四/死), Korean (sa, 사/死), and Vietnamese (tứ/tử). This isn't a quirky superstition — it's a deep cultural force called tetraphobia that shapes real estate, architecture, transportation, and daily life. Buildings across East Asia skip the 4th floor. Some Hong Kong apartments jump from floor 39 straight to 50, omitting everything in the 40s. Hospitals avoid room 4. The Chinese and Taiwanese navies don't assign the number 4 to ships. In Japan, 49 is especially dreaded — it sounds like "pain until death." None of this makes 4️⃣ a less useful emoji for numbered lists, but if you're sending it to someone from East Asia, context matters.

4️⃣ shows up in numbered lists (its primary job), "top 5" content where it's the fourth item, and as part of phone numbers and codes. In East Asian social media, 4 is often actively avoided — Chinese businesses pay premium prices for phone numbers and addresses without any 4s. Gift-giving etiquette in Japan explicitly warns against giving things in sets of four. On Western social media, none of this registers — 4 is just a number between 3 and 5. That cultural disconnect is part of why 4️⃣ sits in the middle of keycap search interest at 32 — used by everyone for formatting, avoided by many for cultural reasons.

Like all keycap emojis, 4️⃣ is a three-character Unicode sequence: U+0034 (digit 4) + U+FE0F (variation selector) + U+20E3 (combining enclosing keycap). On AT&T's 1963 touch-tone keypad, the 4 key was labeled "GHI." But the number's story goes much deeper than a phone button. Tetraphobia — the avoidance of the number 4 — has shaped architecture, transportation, and commerce across East Asia for centuries. The linguistic root is simple: in Mandarin, Cantonese, Japanese, Korean, and Vietnamese, the word for "four" is a near-homophone of the word for "death." This isn't a fringe belief — it influences real estate pricing (apartments on the 4th floor sell for less), building design (many skip floors with 4), gift etiquette (never give 4 of something), and military operations (navies avoid hull number 4). The number 13 serves a similar role in Western culture, but tetraphobia's influence on daily life is far more pervasive.

Encoded as U+0034 U+FE0F U+20E3 — the digit 4 + variation selector + combining enclosing keycap. Base character in Unicode since 1.1 (1993). Keycap emoji sequence joined Emoji 3.0 in 2016.

Four is the sharpest cultural divider among single digits. In East Asia, it's associated with death and actively avoided. In the West, it's neutral to positive: four seasons, four cardinal directions, four elements, the Fourth of July, the Beatles as the "Fab Four," the Fantastic Four. The four-leaf clover is a good luck symbol in Western tradition — the exact opposite of East Asian associations. This creates real business implications: Motorola's Chinese phone models don't use 4 in model numbers. Nokia skipped phone models from 3 to 5 in some Asian markets. Hotels in Macau and Hong Kong commonly omit floors 4, 14, 24, 34, and the entire 40-49 range.

• •Tetraphobia affects real estate prices: apartments on the 4th floor sell for measurably less in Chinese, Japanese, and Korean markets.
• •The Chinese and Taiwanese navies don't assign hull number 4 to ships. Some airlines skip row 4 on flights to and from East Asia.
• •In Japan, the number 49 (shi-ku) is especially dreaded — it sounds like "pain until death" (死苦).
• •Nokia skipped some phone model numbers containing 4 in Asian markets. Motorola avoids 4 in Chinese product naming.
• •The four-leaf clover has a 1 in 5,000 chance of appearing in a clover patch — making it rare enough to be lucky in Western culture, while its number is unlucky in Eastern culture.