Gunghap: how Korean saju compatibility actually works
In Korea, couples and their families still check gunghap — compatibility read from two birth charts. Here's what a reading actually compares, which pairings are considered strongest, and why a "bad" result isn't the verdict people think it is.
Gunghap (궁합) is the Korean word for compatibility read from two people's saju — their birth charts. For a long time it was a standard step before a marriage: families would take both charts to a reader and ask whether the match would hold up. Plenty of people still do it, and younger couples do it for fun, the way people elsewhere compare star signs.
Most English explanations either make it sound like fate or wave it off as a horoscope. It's more specific than both. A gunghap reading compares a few concrete things, and once you know what they are, you can mostly read the basics yourself.
The shortcut everyone starts with: zodiac animals
The folk version just compares your two birth-year animals. Some pairs are said to get along — the Rat, Dragon and Monkey, for example — and some are said to grate.
It's the gunghap equivalent of comparing sun signs. Fun at dinner, but a serious reader barely looks at it, because the year is the least personal part of the chart. Everyone born the same year shares it.
What a real reading compares
1. The two day masters
Your day master is the element you're built around — one of ten, like the Sun, the Mountain or the Rain. (All ten are here.) The first thing a reader looks at is how your two day masters relate:
- One feeds the other. Wood feeds fire, fire makes earth, earth produces metal, metal carries water, water feeds wood. The one doing the feeding tends to support; the one being fed tends to grow. Usually comfortable, sometimes lopsided.
- One checks the other. Wood breaks up earth, earth dams water, water puts out fire, fire melts metal, metal cuts wood. This isn't automatically bad — a bit of pressure keeps people sharp — but it's the pairing where one person can feel managed.
- Same element. Easy understanding, and also two people who want the same thing at the same time.
2. The classic combinations
On top of those loops, five specific pairs of day masters are traditionally said to combine — to fit together in a way that's stronger than the loops predict:
| Pair | The image |
|---|---|
| Tall Tree + Garden | The tree gets roots, the soil gets shape |
| Vine + Sword | The blade clears a path, the vine knows where to grow |
| Sun + Jewel | Light on a jewel is the whole point of both |
| Candle + Ocean | A steady light and deep water keep each other in check |
| Mountain + Rain | Rain on a mountain is how anything grows there |
And four pairs clash head-on: the Tall Tree and the Sword, the Vine and the Jewel, the Sun and the Ocean, the Candle and the Rain. Those are the "handle with care" matches — two people pushing on the same spot.
3. Whether you fill each other's gaps
Every chart has eight characters, and most are lopsided — lots of one element, little or none of another. A reader checks whether your partner's chart has what yours is missing. Someone with almost no water in their chart paired with someone who has plenty is considered a good sign, almost regardless of everything else. This is the part that makes gunghap more than a lookup table.
4. The "spouse palace"
The bottom character of your day pillar is traditionally called the spouse palace — the slot in your chart that describes your closest partnership. Readers check whether the two spouse palaces clash with each other. A clash here is read as friction in day-to-day life together, not as a doomed match.
A "bad" gunghap isn't a verdict
This is where the old reputation does the most damage. Stories about families blocking marriages over gunghap are real, but most readers today frame it the other way around: the reading tells you where the friction will be so you can see it coming.
A Sun and an Ocean aren't told to break up. They're told that one of them runs hot and loud and the other runs big and restless, and that the fights will probably be about space. That's useful whether or not you believe a birth date can tell you anything — and to be clear, there's no scientific evidence that it can. It's a tradition, and a surprisingly good vocabulary for how two people differ.
Try it with your own pair
The fastest version needs no birth charts at all. You and your partner each take the day master quiz, then compare your results to the table above. Every result page also lists that day master's best match and the one to handle with care.
For the real thing, look up both actual day masters with a saju calculator and read the same table. And if your quiz results and your real day masters don't agree, that's the more interesting conversation anyway.