Gunghap (궁합) is the traditional Korean practice of comparing two people's saju (Four Pillars) birth charts to evaluate compatibility. It examines how each person's heavenly stems, earthly branches, and Five Elements interact — identifying harmony, tension, and balance.

How accurate is saju compatibility?

Saju compatibility is a classical interpretive framework, not a scientific predictor. Its value lies in surfacing structural patterns — elemental clashes, energy imbalances, seasonal tensions — that experienced readers use as a basis for relationship counseling.

What birth data do I need for a saju compatibility reading?

You need the birth year, month, day, and hour for both people. Birth hour determines the Hour Pillar, which refines the reading. If the exact hour is unknown, readings can still be done using the three known pillars.

Can I check friendship compatibility with saju?

Yes. Gunghap analysis applies to any two people — romantic partners, close friends, business partners, or family members. The same elemental interaction principles reveal where energy flows naturally and where friction is likely.

Saju Compatibility Reading | Cheonmyeongdang

Direct answer: A saju compatibility (gunghap) reading compares two people's Four Pillars birth charts to assess Five Element interactions, yin/yang balance, heavenly stem harmony, and earthly branch clashes. It shows where two energies support each other, where friction may arise, and what each person brings to the relationship dynamic.

What Saju Compatibility Analysis Covers

Korean saju (四柱, Four Pillars) is a classical system of birth-chart analysis derived from the year, month, day, and hour of birth. Each pillar consists of a heavenly stem and an earthly branch, giving a chart of eight characters that map a person's elemental constitution.

Compatibility analysis — called gunghap (궁합) — places two charts side by side and examines four layers of interaction:

Five Elements balance: Wood, Fire, Earth, Metal, Water across both charts — which elements reinforce each other and which clash.
Yin/Yang ratio: Whether the combined chart is weighted toward active (yang) or receptive (yin) energy.
Heavenly stem harmony: Specific stem pairs (e.g., Wood stem + Metal stem) that either form combinations or create tension.
Earthly branch relationships: The twelve animal branches can form powerful triads of support, or six-clashes and six-harms that signal recurring friction points.

Five Element zones from both charts — the overlap shows shared Earth energy, yin/yang ratio, and stem harmony.

The Four Layers Examined in a Reading

1. Five Elements Interaction

Each of the eight characters in a saju chart belongs to one of five elements. When two charts are placed together, the combined element count reveals whether the relationship creates constructive cycles (Wood feeds Fire, Fire enriches Earth) or destructive ones (Metal cuts Wood, Water douses Fire). A reading identifies which direction dominates.

2. Yin and Yang Ratio

Heavenly stems and earthly branches each carry a yin or yang charge. Two people who are both strongly yang may generate drive but also competition. A yin-dominant pairing may be harmonious but lack initiative. Balance between the two charts tends to produce the most stable relational foundation.

3. Stem Combinations and Clashes

Ten heavenly stems pair in specific ways. For example, the Wood stem (甲 Jia) and the Earth stem (己 Ji) form a harmonious combination known as a "heavenly stem union." When a stem from one person's chart combines with a stem from the other's, the pair shares a structural resonance that classical texts associate with natural rapport.

4. Branch Triads, Clashes, and Harms

The twelve earthly branches — the animal signs of the year, month, day, and hour — interact according to a set of classical rules. Three branches can form a power triad that amplifies shared energy. Two branches separated by six positions in the zodiac form a direct clash. These patterns show up in timing: years when clash branches are activated tend to be stressful for the relationship regardless of other factors.

Check Your Compatibility ($9.99)

Enter both birth dates and receive a full gunghap report covering all four layers above.

What the Report Delivers

The Cheonmyeongdang compatibility report ($9.99 one-time) provides:

Combined element count and dominant element analysis
Yin/yang ratio across both charts with interpretation
Stem combination and clash table for all eight stems
Branch triad, clash, and harm mapping for all eight branches
Overall harmony score and written interpretation
Areas of natural support and recurring tension points

The reading is generated from classical saju algorithms. It does not require an account or subscription — pay once, receive the report immediately.

The Four Pillars structure: Year, Month, Day, Hour — each with a Heavenly Stem and Earthly Branch. The Day Pillar (red) carries the Day Master, the core identity in compatibility analysis.

Frequently Asked Questions

What is gunghap?: Gunghap (궁합) is the traditional Korean practice of comparing two people's saju (Four Pillars) birth charts to evaluate compatibility. It examines how each person's heavenly stems, earthly branches, and Five Elements interact — identifying harmony, tension, and energy balance between the two charts.
How accurate is saju compatibility?: Saju compatibility is a classical interpretive framework grounded in Five Element theory and branch interaction rules — not a scientific predictor. Its practical value is in surfacing structural patterns: elemental clashes, energy imbalances, and seasonal tensions that practitioners use as a framework for understanding relationship dynamics. Readers typically treat it as one lens among several, not a definitive verdict.
What birth data do I need for a saju compatibility reading?: You need the birth year, month, day, and hour for both people. The birth hour determines the Hour Pillar, which refines the analysis significantly. If the exact birth hour is unknown, a reading can still be produced from the three known pillars, though with reduced precision in the Hour Pillar layer.
Can I check friendship compatibility with saju?: Yes. Gunghap analysis applies to any two people — romantic partners, close friends, business partners, or family members. The same elemental interaction principles apply regardless of the relationship type. The reading reveals where energy flows naturally between two charts and where friction may arise, regardless of the relationship context.