庚 × 癸
Yang Metal and Yin Water Compatibility in Korean Saju
The Blade (경금 (gyeonggeum)) · The Rain (계수 (gyesu))
Nourishing pairing
A generation (상생) pairing — one energy naturally feeds the other, so the relationship has a built-in current.
The Pairing: The Blade Meets The Rain
Yang Metal (庚, the blade) brings forged decisiveness that holds its lines. Yin Water (癸, the rain) brings fine, pervasive intuition that reads every undercurrent. In the Five Element cycle, Metal feeds Water — the blade naturally nourishes the rain, giving this pairing a built-in direction of flow. One yang charge, one yin — the classical complement. One initiates, one receives and refines, and when the roles are respected the pairing self-balances.
How the Energy Flows
Metal generates Water in the 상생 cycle, so energy in this pairing has a natural direction: from Yang Metal toward Yin Water. The Blade feeds; the rain grows. That current is the pairing's great gift — support flows without being negotiated — and its hidden bill: the feeder can quietly deplete, and the fed can quietly forget the feeding is costing something. The healthy version of this pairing builds a return current on purpose.
In Love
Yang Metal loves with total loyalty inside clearly drawn lines — the word given once is the word kept. Yin Water loves by sensing — meeting needs before they're spoken, reading the weather under the words. The match works when each learns to read the other's dialect of care rather than waiting for their own. Yang Metal needs a partner who values a kept promise over a performed one, and asks for time before the verdict. Yin Water needs a partner who asks about the rain's own weather, and gives the intuition a place to rest. 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 generation current has its own shadow: Yang Metal can slide from supporting into carrying, and Yin Water from receiving into expecting. Underneath sit the two individual traps: Yang Metal's is finality — cutting cleanly where mending was possible; Yin Water's is permeability — absorbing everyone's currents with no vessel of their own. Most conflict in this pairing is one trap activating the other.
Making It Work
Name the current. Once both people can say out loud that Yang Metal feeds and Yin Water grows, the pairing can do deliberately what it otherwise does blindly: schedule the return flow, let Yin Water nourish back in their own mode, and check in before Yang Metal runs dry rather than after.
Go Deeper on Each Day Master
This page reads the pairing; the individual archetypes each have a full deep dive — Yang Metal (庚): The Blade and Yin Water (癸): The Rain. For how full-chart compatibility readings work beyond Day Masters, see Saju Compatibility: How 궁합 Works.
Frequently Asked Questions
The element cycle favors this pairing: Metal generates Water, so Yang Metal naturally feeds Yin Water's energy. That built-in support current is a genuine advantage — though a full compatibility reading weighs all four pillars of both charts, not just the Day Masters.
Yang Metal is drawn to fine, pervasive intuition that reads every undercurrent — something worth feeding, a place for the blade's energy to land and become growth. Yin Water, in turn, reads Yang Metal's "Says it once. Means it forever." 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 Yang Metal-feeds-Yin Water current gets a deliberate return flow before the feeder depletes. 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.