BLUEMOON SAJU · WIKI
What is Saju?
Eight characters. A new way to see yourself.
Discover Korean astrology with Cheongwol. A beginner’s guide to Saju, the Four Pillars of Destiny, your Day Master, the Five Elements, and how Saju relates to BaZi.
Your companions in Saju
BlueMoon Saju · Cheongwol
01
Four pillars. Eight characters. A place to begin.
Saju (사주, 四柱) is a Korean tradition of interpreting a person’s birth year, month, day, and hour through a calendar-based chart. The name means “four pillars.” Each pillar contains a Heavenly Stem and an Earthly Branch: four pairs, or eight characters. Saju Palja (사주팔자, 四柱八字) names the complete arrangement.
You may have found Saju through searches for Korean astrology, a Korean birth chart, or Korean fortune telling. Unlike a horoscope based only on your zodiac sign, a Saju reading considers all four pillars and their relationships. Its framework draws on yin and yang, the Five Elements, and the recurring stem–branch calendar.
Saju shares its historical foundations with Chinese BaZi and Japanese Shichu Suimei. In Korea, it is discussed around relationships, career choices, and the new year. It is a cultural interpretation system, not a scientifically validated way to establish personality or predict events.
02
How to read the four pillars
Read each column as a pair. The upper character is a Heavenly Stem; the lower one is an Earthly Branch. Here is a schematic chart to help you find your way.
Select any character to learn about its element and meaning.
Year · Your wider world
Traditionally associated with family roots, early surroundings, and a broader social background. The familiar zodiac animal comes from the year’s Earthly Branch.
Month · Your seasonal setting
Shows the birth season and is central to assessing the strength of the elements. Saju months follow solar terms, rather than simply starting on the first of each calendar month.
Day · Your point of reference
The upper character is your Day Master, the reference point for the reading. The lower character is also traditionally considered when discussing close relationships.
Hour · A finer layer
Adds detail to the full chart. Its traditional themes include later life, children, and what you create. Earthly Branch hours generally cover two-hour periods.
03
Meet your Day Master
Find the upper character in the Day column. This is the Day Master (日主), also called the day stem. It is one of ten Heavenly Stems: each combines an element with yin or yang. Jia (甲), for example, is yang Wood; Yi (乙) is yin Wood.
The Day Master gives the reading a reference point. The other characters are interpreted in relation to it, including the relationships called the Ten Gods. Sharing a Day Master does not mean sharing the same chart: the birth season, other pillars, and their interactions still matter.
04
The Five Elements, made simple
Wood, Fire, Earth, Metal, and Water are symbolic phases of change. They describe relationships within the chart, rather than literal ingredients in your body.
Wood
Growth · direction · beginnings
Fire
Expression · warmth · visibility
Earth
Stability · connection · support
Metal
Structure · boundaries · refinement
Water
Reflection · adaptability · learning
In the generating cycle, Wood feeds Fire, Fire produces Earth, Earth bears Metal, Metal generates Water, and Water nourishes Wood. A reading also considers the controlling cycle and the birth season. Counting colored boxes alone cannot tell you which element is helpful; a missing element is not automatically a problem.
05
What happens in a Saju reading?
- 1
Check the birth information
Begin with the birth date, whether it is recorded in the solar or lunar calendar, and the birth time if known. Birthplace and time-zone conventions can affect time conversion. Do not invent a birth time to make a chart look complete.
- 2
Build and understand the chart
Calendar calculations produce the stem–branch pairs. Find the Day Master, consider the month’s season, and look at the other characters, hidden stems, and relationships. Interpretation is a separate step from calculation.
- 3
Put a question in context
A reading may discuss work, relationship patterns, or timing through ten-year cycles (Daewoon) and yearly cycles. These are traditional interpretations, not promises of a specific job, partner, or outcome.
06
Saju, BaZi, and Western astrology
Saju · Korean Four Pillars
The Korean practice of a shared East Asian stem–branch tradition. A reading uses the birth year, month, day, and hour, interpreted through yin–yang and the Five Elements.
BaZi · Eight Characters
BaZi is the Chinese name for the eight-character chart. The underlying framework overlaps with Saju, while terminology, interpretation, and calculation conventions can vary by school.
Western astrology
A different system using the positions of celestial bodies, signs, houses, and aspects. A Day Master is not the same as a Sun sign, and Saju’s seasonal months are not zodiac-sign months.
07
Let the reading open a conversation
A useful question is specific: “When do I overcommit at work?” or “What do I need to communicate in a relationship?” You can reflect on a reading without treating it as a fixed identity. People with similar charts still have different circumstances, experiences, and choices.
At BlueMoon Saju, Cheongwol is your character guide to this tradition. Use the wiki to understand the vocabulary before deciding whether to explore a personal reading. Saju is not a substitute for medical, financial, or legal advice, and no chart should decide an important life choice for you.
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Questions you might be wondering about
What does Saju mean in English?
Saju means “four pillars.” Four Pillars of Destiny is a common English name. “Korean astrology” and “Korean fortune telling” are familiar search terms, although the chart uses calendar stems and branches rather than planetary positions.
Is Saju the same as BaZi?
They share the four-pillar, eight-character framework. Saju is the Korean practice and BaZi is the Chinese term for eight characters. Individual schools can differ in how they calculate boundaries and interpret a chart.
Can I get a Saju reading without my birth time?
A limited reading can use the year, month, and day. The hour pillar remains unknown, so conclusions that depend on it should stay open. A time near midnight may also require care with the day-boundary convention.
Do I need my lunar birthday?
Not necessarily. You need to know which calendar your recorded date uses and select it accurately. A lunar date may need leap-month information. Do not convert a date twice.
Why do two Saju calculators give different results?
Check solar versus lunar input, time zone, daylight saving time, solar-time correction, solar-term boundaries, and the rule for changing the day. Small input or convention differences can change a pillar.
Is Saju only for Korean people?
No. The chart is calculated from birth information rather than nationality. Accurate calendar and time handling matters more than where your family is from.
Does a missing element mean I have bad luck?
No. An element’s role depends on the whole chart and season. A missing visible element is not a diagnosis, a curse, or a reason to buy a remedy.
Can Saju predict my future accurately?
There is no established scientific basis for guaranteed predictions from a Saju chart. Treat a reading as cultural interpretation and a prompt for reflection, not proof that an event must happen.
BLUEMOON SAJU
Your next small discovery
Now you know the map. Explore the Five Elements, meet the ten stems, or take a closer look at a word from your reading.
Explore BlueMoon Saju →