What is Saju (사주)?
Saju literally means “four pillars.” It is the Korean system of astrology — closely related to Chinese Bazi — built from the exact moment you were born: your birth year, month, day and hour. Each of those four pillars is written with two characters, a Heavenly Stem and an Earthly Branch, giving eight characters in total (called palja, 팔자). Those characters map onto the five elements — Wood, Fire, Earth, Metal and Water — and the way they balance and interact is read to understand your personality, your relationships, your career and the flow of your life.
The Four Pillars of Destiny
- ①Year pillar — your roots, ancestry and early life; also the basis of your Korean zodiac animal.
- ②Month pillar — your social self, career and the “season” you were born into.
- ③Day pillar — the heart of the chart. Its Heavenly Stem is your Day Master — the “you” of your Saju.
- ④Hour pillar — your inner world, later life and children (needs your birth time).
The Five Elements & your Day Master
Everything in Saju comes back to the five elements. Wood grows and expands, Fire shines and spreads, Earth stabilizes and holds, Metal cuts and refines, and Water flows and adapts. Your Day Master — the stem of your birth day — is one of ten types (Yang or Yin of each element), such as Yang Wood, the great tree or Yin Water, the rain. Reading which elements support or drain your Day Master, and which are strong or missing, is the core of a Saju reading.
Saju vs. Western astrology vs. Bazi
Western astrology reads the sky — where the sun, moon and planets sat among the zodiac when you were born. Saju reads the calendar — your birth date in the Stem-Branch system — and weighs the five elements, with the Day Master at the center. Bazi is the Chinese form of the same Four-Pillars tradition; Saju is its Korean lineage, with its own interpretive style. If you’ve only ever read your sun sign, Saju is a deeper, more personal lens on who you are.