Saju (四柱) is the original four-pillar astrology Korean families have consulted for over 1,000 years — predating Western horoscopes and going far deeper than zodiac signs.
While Western astrology assigns one sign per year, Korean Saju maps four pillars: the year, month, day, and hour of your birth. Each pillar combines a heavenly stem and earthly branch, creating 60 possible combinations — and 60 × 60 × 60 × 60 = 12.9 million unique charts.
Ancestry / early life
Career / social
Self / partner
Children / late life
Korean families historically consulted Saju masters before marriage, business launches, and major life decisions. Our AI distills 1,000+ years of Saju texts and modern interpretations into clear English readings — without losing the depth.
The hour pillar is the fourth of the four pillars, and it is what separates a Saju chart from a sun-sign horoscope. Two people born on the same day but in different two-hour branches get different hour pillars, which shifts the Five Element balance of the whole chart. If your birth hour is unknown, the remaining three pillars — including the Day Master — still produce a readable chart.
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1. Provide your birth details — date, exact time (hour and minute if known), and birth city. The hour is critical for Saju (Western astrology often skips it).
2. We generate your four pillars — using the traditional Korean lunisolar calendar conversion and verified Saju calculation methods used by Korean masters since the Goryeo dynasty.
3. Our AI interprets your chart — drawing on the classical Korean Saju texts Jeokcheonsu (적천수), Japyeongjinjeon (자평진전) and Myeongnijeongjong (명리정종), together with modern Korean Saju practitioners' frameworks.
4. You receive your reading by email — within 24 hours for single, instantly via dashboard for monthly.
Saju (사주, 四柱) is Korean for "four pillars" — the year, month, day and hour of your birth. Each pillar holds two characters, a Heavenly Stem and an Earthly Branch, so a full chart is eight characters. That is why Koreans also call it Saju Palja (사주팔자, "four pillars, eight characters").
Yes. The Four Pillars are calculated from a birth date, time and location on the solar-term calendar, not from nationality or ancestry. Any birth date anywhere in the world converts into the same eight characters, and this page delivers the interpretation in English.
They share roots in the same classical texts, but Korean Saju emphasizes the Day Master (일간) more heavily and uses Korean-specific interpretation lineages developed over the Joseon dynasty. The frameworks have diverged over 600+ years.
No — Vedic astrology is sidereal and planetary, Saju is calendrical and elemental. They answer different questions about the same person.
No. Many Koreans treat Saju as a cultural framework for self-reflection, similar to MBTI in the West — useful regardless of metaphysical belief.
Provide what you have — many readings are insightful even without the hour. The day pillar (the core) is always available from just the date.
Saju Palja — what your eight characters mean →
Saju app — how an online reading works →