甲 × 庚
Yang Wood and Yang Metal Compatibility in Korean Saju
The Tall Pine (갑목 (gapmok)) · The Blade (경금 (gyeonggeum))
Dynamic pairing
A control (상극) pairing — one energy shapes the other. The most demanding relation in the cycle, and often the most growth-forcing.
The Pairing: The Tall Pine Meets The Blade
Yang Wood (甲, the tall pine) brings upright principle that leads from the front. Yang Metal (庚, the blade) brings forged decisiveness that holds its lines. In the Five Element cycle, Metal controls Wood — the blade presses on the tall pine, which makes this one of the charged pairings: friction that either sharpens both people or wears them down. Both are yang stems — two initiators, two forward charges. There's no shortage of momentum in this pairing; the question is whether the two currents run parallel or collide.
How the Energy Flows
Metal controls Wood in the 상극 cycle — the axis of pressure. The Blade acts on the tall pine the way the element acts: shaping, checking, demanding. Classical readings are careful here: 상극 is not a curse. Control is how raw material becomes form — but only when the pressure is wanted and measured. Charts and maturity decide which version a given couple gets: the sculptor's chisel, or the grindstone that never stops.
In Love
Yang Wood loves by standing for the relationship in public — visibly, on principle, without hedging. Yang Metal loves with total loyalty inside clearly drawn lines — the word given once is the word kept. The match works when each learns to read the other's dialect of care rather than waiting for their own. Yang Wood needs a partner who respects conviction and doesn't ask the pine to pretend to bend. Yang Metal needs a partner who values a kept promise over a performed one, and asks for time before the verdict. Whether each can supply what the other is missing — rather than what they themselves would want — is the real compatibility question, and it's the one the element cycle frames but doesn't answer.
Where It Rubs
The 상극 axis means pressure is built into the pairing's physics: Yang Metal's natural mode can land on Yang Wood as constraint, and Yang Wood's response can read to Yang Metal as resistance. Underneath sit the two individual traps: Yang Wood's is rigidity — snapping where bending was available; Yang Metal's is finality — cutting cleanly where mending was possible. Most conflict in this pairing is one trap activating the other.
Making It Work
Make the pressure opt-in. Yang Metal's shaping instinct is a gift exactly as long as Yang Wood has asked for it — the same sentence lands as sculpting or as grinding depending on consent and timing. And Yang Wood owes the pairing honesty about limits before resentment does the talking. 상극 couples that work convert the pressure into growth on purpose; the ones that don't just erode.
Go Deeper on Each Day Master
This page reads the pairing; the individual archetypes each have a full deep dive — Yang Wood (甲): The Tall Pine and Yang Metal (庚): The Blade. For how full-chart compatibility readings work beyond Day Masters, see Saju Compatibility: How 궁합 Works.
Frequently Asked Questions
This is a 상극 (control) pairing — Metal controls Wood — which the tradition treats as demanding rather than doomed. These couples either sharpen each other into their best forms or wear each other down; the rest of both charts, and both people's maturity, decide which. Day Masters alone can't settle it.
Yang Wood is drawn to forged decisiveness that holds its lines — a force that doesn't fold under the tall pine, which is rarer than it sounds. Yang Metal, in turn, reads Yang Wood's "Doesn't bend. Leads. Or breaks." not as a warning but as the point.
Long-term, this pairing lives or dies on the same axis as its everyday chemistry: whether the built-in pressure stays consensual — shaping by invitation rather than by default. Saju would also weigh both full charts, the luck cycles (대운) each person is moving through, and the branch relationships between the pillars — which is what a complete 궁합 reading covers.
Day Masters are 2 of 16 characters in a couple chart. The full 궁합 reading compares all four pillars of both charts.