Your birth chart has eight characters — not twelve signs.

Saju (사주), literally “four pillars,” is Korea's traditional method of reading a person's birth chart. It maps the year, month, day, and hour of your birth onto a framework of ten heavenly stems and twelve earthly branches — eight characters in total — to describe the balance of elements you were born with.

The system traces back to the classical Four Pillars of Destiny tradition that spread across East Asia centuries ago, but Korea developed its own distinct school of interpretation — still practiced today by professional myeongni (명리) readers across the country, from long-running neighborhood practices to the reading cafes of Myeong-dong.

Unlike a sun-sign horoscope, which sorts every person born in a roughly 30-day window into one of twelve categories, Saju starts from your exact birth date, time, and location — resolving the historical time zone and daylight saving rules in effect on the day you were born, then correcting for true solar time at your birth city. Two people born a day apart can end up with noticeably different charts.

Saju isn't a set of fixed predictions — it's a framework for self-reflection: understanding your natural tendencies, the elemental balance behind your personality, and the broad, decade-long cycles your chart moves through over a lifetime.

Want the deeper story — your Day Master, the Four Pillars, the Ten Gods, and how Saju compares to BaZi? Read our Saju basics guides →