Your best Saju compatibility match is determined primarily by your Day Master element and how it interacts with your partner's Day Master through the Five Element productive and controlling cycles. In Korean Gunghap (궁합) tradition, a Wood Day Master naturally harmonizes with Fire and Water partners, a Fire Day Master aligns with Wood and Earth, an Earth Day Master pairs well with Fire and Metal, a Metal Day Master thrives with Earth and Water, and a Water Day Master resonates with Metal and Wood. Beyond the Day Master, a full compatibility reading examines Branch harmonies, the spouse palace (your Day Branch), and the overall elemental balance across both Four Pillars charts. A Branch harmony such as Samhap (Three Harmony) or Yukhap (Six Harmony) between partners' Day Branches significantly strengthens the assessment. Understanding all these layers together reveals not just surface attraction but the deep structural energy between two people — and whether their life rhythms will align over the long term.
Gunghap (궁합) is the traditional Korean art of assessing romantic and marital compatibility through the Four Pillars of Destiny, known as Saju (사주). Each person's birth date and time generates four pillars — Year, Month, Day, and Hour — each containing a Heavenly Stem and an Earthly Branch. The Day Pillar is considered the most personal pillar: the Day Stem (the Heavenly Stem of the Day Pillar) is your Day Master, representing your core identity, and the Day Branch is your spouse palace, representing your romantic and domestic life.
When two people's Saju charts are compared, a Gunghap analysis examines how their Day Masters relate through the Five Element cycle, whether their Branch signs form harmonies or clashes, and whether the overall elemental distribution across both charts creates a balanced, supportive dynamic or an unbalanced, draining one.
The backbone of Saju compatibility analysis is the Five Element (Ohaeng, 오행) productive cycle: Wood feeds Fire, Fire creates Earth, Earth contains Metal, Metal generates Water, and Water nourishes Wood. This cycle continues endlessly, creating a circle of mutual generation.
Five Element (Ohaeng) cycle: green arrows show productive flow (favorable in compatibility); red dashed arrows show controlling relationships (require balance and awareness).
When two partners' Day Masters sit adjacent in the productive cycle — for example, one being Wood and the other Fire — they naturally energize each other without effort. When Day Masters sit in a controlling relationship — Wood controlling Earth, or Water extinguishing Fire — the partnership requires more conscious work to remain balanced.
The following guide covers the primary compatibility tendencies for each of the ten Day Master types (five elements in Yin and Yang polarity). Best matches are listed in order of natural elemental affinity.
| Day Master | Best Match Partners | Elemental Reason | Requires Effort |
|---|---|---|---|
| Wood (Jia / Yi) | Fire, Water | Wood feeds Fire (creative flow); Water nourishes Wood (supportive root) | Metal (controls Wood) |
| Fire (Byeong / Jeong) | Wood, Earth | Wood fuels Fire (resource); Fire creates Earth (expressive outlet) | Water (controls Fire) |
| Earth (Mu / Gi) | Fire, Metal | Fire generates Earth (energizing source); Earth produces Metal (natural output) | Wood (controls Earth) |
| Metal (Gyeong / Shin) | Earth, Water | Earth creates Metal (nourishing base); Metal generates Water (creative flow) | Fire (controls Metal) |
| Water (Im / Gye) | Metal, Wood | Metal feeds Water (resource depth); Water nourishes Wood (directed purpose) | Earth (controls Water) |
Note that same-element pairings (e.g., Wood with Wood) are neither productive nor controlling. They can indicate deep mutual understanding but may create imbalance if both partners share the same elemental weakness or strength.
A thorough Saju compatibility analysis extends well beyond the Day Master element comparison. Experienced Saju readers examine the following layers:
The Day Branch is called the spouse palace because it represents the energy of one's romantic partner and domestic life. When two people's Day Branches form a harmonious combination — such as a Three Harmony (Samhap) or Six Harmony (Yukhap) — the union carries inherent structural support. Clashing Day Branches (Chung, 충) can indicate recurring conflict in the shared daily environment.
Three Harmony groups are: Snake-Rooster-Ox (Metal), Tiger-Horse-Dog (Fire), Pig-Rabbit-Goat (Wood), and Monkey-Rat-Dragon (Water). Partners whose Branch animals belong to the same Three Harmony group share a deep underlying elemental resonance. Six Harmony pairings (Rat-Ox, Tiger-Pig, Rabbit-Dog, Dragon-Rooster, Snake-Monkey, Horse-Goat) indicate complementary, balancing energies.
The six Branch clashes are: Rat-Horse, Ox-Goat, Tiger-Monkey, Rabbit-Rooster, Dragon-Dog, and Snake-Pig. When these appear between the Day Branches of two partners, traditional Saju practitioners note areas of potential friction that require communication and conscious navigation.
A full Gunghap reading compares the elemental distribution across all eight pillars of the combined chart (four from each person). An ideal pairing often sees two charts complementing each other's elemental deficiencies — for example, one partner strong in Water balancing another who lacks Water energy.
Within each element, the Heavenly Stem carries either Yang (strong, outward) or Yin (gentle, inward) energy. Yin-Yang complementarity between Day Masters — such as Yang Wood (Jia) pairing with Yin Fire (Jeong) — generally indicates a more dynamic, naturally flowing partnership than two Yang or two Yin stems of the same element.
Gunghap (궁합) is the traditional Korean system of determining romantic and marital compatibility by comparing two people's Four Pillars of Destiny (Saju). It examines how the Day Masters, Earthly Branches, and the Five Elements interact between two birth charts. A strong Gunghap indicates harmonious elemental energy exchange, mutual support, and emotional resonance. Gunghap analysis goes beyond simple sun-sign matching — it evaluates multiple layers of the chart including Branch harmony, elemental flow, and the balance of Yin and Yang energies.
Day Master compatibility follows the Five Element productive cycle. Wood Day Masters are most compatible with Fire (Wood feeds Fire, creating natural nurturing energy) and Water (Water nourishes Wood). Fire Day Masters pair well with Wood (fuel) and Earth (Fire produces Earth, a creative bond). Earth Day Masters are supported by Fire (Fire creates Earth) and Metal (Earth generates Metal, a productive flow). Metal Day Masters align with Earth (its source) and Water (Metal produces Water, expressive outlet). Water Day Masters thrive with Metal (Metal generates Water) and Wood (Water nurtures Wood into growth). Opposing elements — Wood and Metal, Fire and Water, Earth and Wood — require more conscious effort to harmonize.
Saju compatibility analysis provides a detailed probabilistic picture of how two people's energies interact, but it does not deterministically predict marriage success or failure. Traditional Korean Gunghap readings assess whether the overall elemental balance between two charts is productive, neutral, or conflicting. Charts with strong Branch harmony, complementary Day Masters, and balanced Yin-Yang polarity are considered favorable for long-term partnership. However, Saju masters emphasize that free will, personal growth, and mutual respect remain decisive factors. A challenging Gunghap can be navigated consciously; a favorable one still requires effort.
Branch harmony refers to the relationship between the Earthly Branches (the 12 animals) in two people's charts, particularly the Day Branch and Year Branch. Branches can form Three Harmonies (Samhap), Six Harmonies (Yukhap), or Pentagram formations — all considered auspicious in Gunghap analysis. Conversely, Branch clashes (Chung) such as Rat vs. Horse or Ox vs. Goat introduce friction and tension. The Day Branch is especially important in compatibility because it represents the spouse palace in Saju theory. When two partners' Day Branches harmonize, their daily life rhythms, emotional needs, and domestic energies tend to align naturally.
Saju and Bazi (BaZi) share the same Four Pillars system rooted in classical Chinese metaphysics, but Korean Saju practice has developed distinct interpretive traditions. Korean Gunghap compatibility places stronger emphasis on the Day Master interaction and the spouse palace (Day Branch) compared to some Bazi schools that weigh all four pillars equally. Korean Saju masters also incorporate uniquely Korean contextual factors such as family lineage energetics and seasonal birth timing within the Korean lunar calendar. The core Five Element logic is identical, but the weighting of pillars, the interpretation of Branch harmonies, and the marriage-specific frameworks differ meaningfully between Korean and Chinese lineages.