The Types of Yongsin: Eokbu, Johu, Tonggwan, and How Readers Pick the Balancing Element

2026-07-14 · computed with the solar-term engine (the Method)

The single most consequential judgment in a saju (사주) reading is the choice of yongsin (용신), the balancing element, the one force that a chart most needs in order to function well. Get it right and everything downstream, the good years, the right career, the useful advice, follows cleanly. Get it wrong and the entire reading points the wrong way. What beginners rarely learn is that finding the yongsin is not a single procedure. There are several different logics for choosing it, each suited to a different kind of chart, and half the skill is knowing which logic a given chart is asking for. Applying the wrong method to a chart is how even careful readers end up recommending the exact element that harms someone.

If the basic idea is new, start with the balancing element itself. This article is about the several roads to finding it.

Eokbu: Balancing Strength

The most common method is eokbu (억부), balancing by strength, and it flows directly from the day master strength reading. The logic is simple and powerful. If the day master is too strong, overloaded with support, the yongsin is an element that drains or restrains it, the wealth it must work for, the authority that disciplines it, the output it spends its excess through. If the day master is too weak, the yongsin is an element that supports it, the resource that feeds it or the companion that reinforces it. Eokbu asks one question, is the core too strong or too weak, and prescribes the element that moves it back toward the center. For the majority of ordinary charts, this is the method.

Johu: Balancing Temperature

The second method looks past strength to climate. Johu (조후) balances the temperature of a chart, and it becomes decisive when a chart is extreme in heat or cold. A chart born deep in winter, heavy with Water and Metal, can be frozen no matter how the strength math works out, and what it needs first is Fire to warm it, warmth being a precondition for anything to grow. A chart born in the height of summer, parched with Fire, needs Water to cool and moisten it before it can function. This is the johu logic, and the crucial point is that in a genuinely frozen or scorched chart, temperature overrides strength. Warm the chart first; balance its strength second. A reader who runs the strength method on a frozen chart and ignores its need for heat has answered the wrong question.

Tonggwan: Bridging a War

The third method handles charts torn between two elements at war. When two powerful forces in a chart clash directly, Metal cutting Wood, Water dousing Fire, with neither able to win, the chart is locked in conflict and cannot flow. Tonggwan (통관), the bridging method, resolves it by introducing the element that mediates between the combatants, the one that both drains the aggressor and feeds the victim, turning a standoff into a cycle. Between warring Metal and Wood, Water is the bridge; it absorbs the Metal and nourishes the Wood, and the war becomes a flow. Tonggwan is the diplomat's method, needed exactly when a chart's problem is not strength or temperature but a frozen conflict that has to be routed around.

Byeongyak and the Follow Methods

Two more logics round out the picture. Byeongyak (병약), the illness-and-cure method, treats the chart like a patient: find the single element causing the most damage, the disease, then prescribe the element that cures it. And for the rare special structures, the ones so dominated by one force that fighting it fails, the yongsin is chosen by following the dominant flow rather than opposing it. These are the charts where ordinary logic inverts, and misreading one as an ordinary chart is a classic and costly error.

Why the Method Must Match the Chart

The reason all of this matters is that the methods can disagree. A frozen chart's strength math might suggest one element while its temperature screams for another. A chart at war might look, by headcount, like it simply needs support. The art is in reading which problem is primary, is this chart's real trouble its strength, its climate, or an internal war, and then applying the method that trouble calls for. This is why the same element can be prescribed to one chart and warned against in another that looks superficially similar, and why any tool that hands out the same lucky element to everyone is not doing the work.

Reading Your Own Balance

Start with the honest strength question and the season you were born into. Is your day master overloaded or starved? Were you born into deep cold or deep heat? Is there an obvious war between two of your elements? Those three questions point toward the method your chart needs, and therefore toward the element that actually helps you, the one worth strengthening in your career, your habits, and your daily life.

Cast your free chart and find not just a balancing element but the right kind of balance. A chart that needs warmth is not helped by more support, and a chart at war is not helped by taking a side. The method has to fit the chart, and that fit is the whole craft.