SECTION 01What is Four Pillars (사주팔자)?
Four Pillars (四柱八字): 四柱 means "four pillars," 八字 means "eight characters." Based on your birth year, month, day, and hour, each is assigned one Heavenly Stem and one Earthly Branch, producing 8 characters total. These 8 characters constitute your Four Pillars — each of the four pillars (Year Pillar, Month Pillar, Day Pillar, Hour Pillar) contains a Stem+Branch pair.
It is the central destiny analysis system in Eastern astrology (命理學), with thousands of years of history. Even today, many Koreans consult it for important decisions like careers, marriage, and business.
Key Moments to Use Four Pillars
Career & Job Change: Identify suitable career paths and auspicious timing to plan your professional direction.
Romance & Marriage: Analyze compatibility (harmony/clash relationships) to understand relationship dynamics.
Business & Investment: Use Life Cycle Flow and annual fortune to gauge optimal timing for starting ventures or making investments.
SECTION 02The 4 Pillars — Year, Month, Day, Hour
Four Pillars is composed of 4 pillars. Each pillar has 1 Heavenly Stem and 1 Earthly Branch, giving a total of 8 characters (八字) across all 4 pillars.
Ancestors · parents' fortune
Parents · siblings · youth
Self & spouse — core pillar
Children · later years
Each pillar is made of 1 Heavenly Stem + 1 Earthly Branch. The 10 Heavenly Stems are: Gab, Eul, Byeong, Jeong, Mu, Gi, Gyeong, Sin, Im, Gye. The 12 Earthly Branches are: Ja, Chuk, In, Myo, Jin, Sa, O, Mi, Sin, Yu, Sul, Hae. These combine into the 60 Jiazi (六十甲子) cycle, creating diverse destiny combinations.
SECTION 03Day Master (일간) — The Core of Four Pillars
The Day Stem (日干) — the Heavenly Stem of your Day Pillar — is called the Day Master (일간). It is the most important reference point in Four Pillars interpretation, symbolizing your very self. Each of the 10 Day Masters carries unique temperament and character based on its Five Element and Yin/Yang nature.
| Day Master | Element | Yin/Yang | Key Traits |
|---|---|---|---|
| Gab Wood (甲木) | Wood (木) | Yang | Leadership, directness, growth-oriented |
| Eul Wood (乙木) | Wood (木) | Yin | Flexibility, empathy, perseverance |
| Byeong Fire (丙火) | Fire (火) | Yang | Vitality, charisma, expressiveness |
| Jeong Fire (丁火) | Fire (火) | Yin | Sensitivity, artistry, deep emotion |
| Mu Earth (戊土) | Earth (土) | Yang | Trustworthiness, inclusivity, stability |
| Gi Earth (己土) | Earth (土) | Yin | Attentiveness, practicality, realism |
| Gyeong Metal (庚金) | Metal (金) | Yang | Decisiveness, principles, strength |
| Sin Metal (辛金) | Metal (金) | Yin | Precision, perfectionism, sharpness |
| Im Water (壬水) | Water (水) | Yang | Ingenuity, tolerance, boldness |
| Gye Water (癸水) | Water (水) | Yin | Intuition, sensitivity, caution |
SECTION 04Five Elements (오행) Distribution and Yongsin
The Five Elements (五行) — Wood (木), Fire (火), Earth (土), Metal (金), Water (水) — are assigned to all 8 characters. The generative cycle is Wood → Fire → Earth → Metal → Water → Wood. The controlling cycle is: Wood controls Earth, Earth controls Water, Water controls Fire, Fire controls Metal, Metal controls Wood.
Analyzing which elements are strong and which are weak in your 8 characters is Five Elements distribution analysis. The element that fills the gap is called "Yongsin (用神)" — your lucky element — and connects to fortunate colors, careers, and directions.
Five Elements and Life Areas
Wood (木): Growth, creativity, endurance — related to education, culture, healthcare
Fire (火): Passion, expression, vitality — related to media, marketing, food service
Earth (土): Stability, inclusivity, trust — related to real estate, finance, construction
Metal (金): Decisiveness, principles, precision — related to IT, law, military/police
Water (水): Wisdom, flexibility, intuition — related to research, philosophy, trade
SECTION 05Life Cycle Flow (대운) and Annual Fortune (세운)
Life Cycle Flow (大運) is the major fortune that shifts in 10-year periods. It begins around age 5 and its direction differs based on gender and the Yin/Yang of the birth year's stem. It is a long-range map showing the broad currents of your life.
Annual Fortune (歲運) is the yearly fortune that arrives every year. 2026 is Byeongo Year (丙午年), in which Fire (火) energy acts strongly. How the Life Cycle Flow and Annual Fortune interact (harmony/clash) with your original chart determines the year's fortunes.
How to Calculate Life Cycle Flow Start Age
Divide the number of days from birth to the nearest solar term (before or after) by 3 — the result is the starting age of your Life Cycle Flow. Yang males and Yin females follow the forward sequence; Yin males and Yang females follow the reverse sequence. MANSHIN AI automatically calculates your Life Cycle Flow start age and each cycle's Stems and Branches when you enter your birth date and time.
SECTION 06Harmony & Clash (합충) — Relationships Within the Chart
Harmony (合) occurs when characters in the chart combine to form a new energy — often producing auspicious effects. Clash (冲) occurs when characters directly oppose each other, signaling change, separation, or events.
Key Harmony & Clash Relationships
Heavenly Stem Harmony (天干合): Gab-Gi, Eul-Gyeong, Byeong-Sin, Jeong-Im, Mu-Gye — different energies combine to create new Five Element energy.
Earthly Branch Clash (地支冲): Ja-O, Chuk-Mi, In-Sin, Myo-Yu, Jin-Sul, Sa-Hae — direct opposition creates energies of change, movement, and conflict.
Harmony and clash relationships can exist permanently within the original chart or be activated at specific times when the Life Cycle Flow or Annual Fortune characters interact with the chart. A chart with many clashes is not necessarily bad — it may indicate dynamism and capacity for change.
SECTION 07How to Read Four Pillars — 3 Practical Steps
A practical 3-step guide for those new to Four Pillars.
Extract the 4 Pillars with a Calendar Calculator
Enter your birth year, month, day, and hour into an Eastern calendar calculator to find the 8 Stem-Branch characters for your Year, Month, Day, and Hour Pillars. MANSHIN's calendar calculator lets you check this instantly.
Identify Your Day Master & Check Five Elements Distribution
Identify the Heavenly Stem of the Day Pillar (your Day Master), then count how many of each element — Wood, Fire, Earth, Metal, Water — appear across all 8 characters. Abundant elements reflect personality strengths; absent elements are areas needing balance.
Request an Interpretation from AI MANSHIN
Enter your birth date and time into MANSHIN AI Four Pillars to receive Day Master personality, Five Elements distribution, harmony/clash analysis, Life Cycle Flow, and AI oracle all at once.
SECTION 08Frequently Asked Questions
※ This content is educational material based on traditional Korean astrology. It is provided for entertainment purposes and does not guarantee actual outcomes.