culture etiquette_violation ai_generated true

AI sets default unit numbers, hospital floors, room assignments, or apartment listings to use the number 4 in Korea without considering tetraphobia

ID: culture/four-floor-tetraphobia

Also available as: JSON · Markdown
88%Fix Rate
85%Confidence
3Evidence
2024-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
any active — — —

Root Cause

Korean tetraphobia (Sino-Korean 四 sa = 死 sa, 'death') still influences building design: hospitals routinely skip floor 4 (showing F instead of 4), older apartments avoid 4-동 building number, hotels/restaurants avoid room 4. Modern construction (post-2010) often labels normally; younger Koreans don't observe personally. Healthcare and elder-facing contexts retain it most strongly.

generic

Workarounds

  1. 90% success For healthcare, elder-facing services, or traditional contexts: skip 4 in room/floor numbering. For modern offices/apartments: 4 is broadly tolerated; younger users rarely notice.

    Sources: https://www.korea.net/NewsFocus/Culture/view?articleId=183420

  2. 92% success Korean wedding cash gifts (축의금): use odd amounts (50,000, 70,000, 100,000 KRW). Recently 50,000-100,000 standard for friends, 100,000-200,000 for closer relations. Even amounts are reserved for funeral 부의금 (white envelope, 30,000-100,000 typical).

    Sources: https://www.korea.net/NewsFocus/Culture/view?articleId=183420

Dead Ends

Common approaches that don't work:

  1. Assign a Korean elderly patient to room 404 in a Korean hospital, or floor 4 in an elderly care home 70% fail

    Korean hospitals overwhelmingly skip floor 4 (often labeled F). Assigning room 404 or floor 4 to elderly patients is read as careless to families. The taboo is most observed in healthcare and funeral contexts.

  2. Default a Korean apartment listing's unit numbers to include 404, 414, etc. without flagging 45% fail

    While newer apartments (2010s+) increasingly use 4 normally, older buildings (1980s-2000s) skip it. Realtors often note 'low floor', 'foreigner-friendly building'. Landlords sometimes price unit 4-동 / 4호 lower in advertisements.

  3. Gift 4 of any item (4 bottles, 4 fruits, 4 chocolates) for a Korean elder 55% fail

    Like Chinese and Japanese tradition, gift counts of 4 are avoided. Use 3, 5, 6, or even-non-4. Wedding gift money: traditionally odd amounts (50,000, 70,000, 100,000) since odd is 'living' (yang); even is 'death' (yin) — opposite of Russia.

Error Chain

Frequently confused with: