Quick Answer
What is sasju?
Sasju, or sajudanja, is a formal document sent by the groom's family to the bride's family recording the groom's "four pillars of destiny" — his birth year, month, day, and hour — traditionally used to help confirm the match and choose an auspicious wedding date.
Last updated:
Last updated:
What is sasju?
Also called: sajudanja, 사주단자, four pillars document.
Sasju is one of the older, quieter steps in traditional Korean matchmaking — long before hanbok fittings or venue bookings, the groom's family formally writes out and sends his exact birth details to the bride's family, wrapped in a specific traditional folding style. Historically this document was used by a fortune teller alongside the bride's own birth details to check compatibility and select the wedding date; today many families keep the exchange as a formal courtesy even when the date is chosen for practical reasons.
How sasju is used
- •The groom's family writes his birth year, month, day, and hour on formal paper, traditionally folded in a specific ceremonial way and wrapped in cloth.
- •This document is sent to the bride's family, historically carried by a formal messenger.
- •Traditionally, the bride's family (or a fortune teller they consult) uses the groom's sasju alongside the bride's own birth details to assess compatibility and help select an auspicious wedding date.
- •The wedding date chosen through this process is sometimes referred to separately as taegil.
Planning notes
- •If following tradition, this step happens early — well before venue booking — since it can influence the wedding date itself.
- •Confirm with both families whether sasju will be a full traditional exchange or a simplified, symbolic gesture, since expectations vary widely by generation.
- •This is a family-to-family exchange, not something a wedding planner or venue is typically involved in arranging.
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See WhatsApp announcements →Frequently Asked Questions
What does sasju literally mean?
Sasju refers to the "four pillars" of a person's birth details — year, month, day, and hour — traditionally used in East Asian astrology to assess compatibility and auspicious timing.
Is sasju still used to set the wedding date today?
Some families still consult a fortune teller using the sasju document to help choose a date, but many modern couples pick their date based on venue availability or personal preference and treat the sasju exchange as a formal courtesy instead.
Who sends the sasju document?
The groom's family prepares and sends it to the bride's family, traditionally as one of the earliest formal steps after a match is agreed upon.
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By Mayank JaiswalLast updated