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How to find your Useful God
— plus Favorable and Unfavorable Gods: choosing the energy your Saju needs

Saju basics · 2026.10.07 · 8 min read

What is the Useful God?

It's the element most needed to balance the eight characters of your Saju. In Hanja it's "use (用)" plus "god/spirit (神)" — meaning the most useful energy in your chart.

Think of it like a remedy suited to your constitution. Just as a body that runs too hot needs cooling and one that runs too cold needs warming, a chart that leans to one side needs an element that fills in the other side. Knowing that element gives you a standard for judging, when reading your 10-year luck cycle or annual luck, "Is this a time when the energy I need is coming in?"

What are the four methods for finding the Useful God?

There are four main methods. In practice, the first two are used the most.

Strengthen-or-restrain (eokbu 抑扶)

It balances the amount of strength. With a strong Day Master, the Useful God is chosen from elements that drain the Day Master's strength (Output, Wealth and Officer stars); with a weak Day Master, from elements that add strength (Companion and Resource stars). This is the most fundamental method.

Climate-balancing (johu 調候)

It balances temperature and humidity. A cold chart born in deep winter (the Hae, Ja and Chuk months) is warmed with Fire (火), and a hot chart born in high summer (the Sa, O and Mi months) is cooled with Water (水). The classic often cited for emphasizing climate balance is the Gungtong Bogam (窮通寶鑑).

Bridging (tonggwan 通關)

When two elements are locked in a standoff, it uses the element that connects them. If Metal and Wood face off, Water (水) links them, since Metal generates Water and Water generates Wood; if Water and Fire face off, Wood (木) becomes the bridge.

Illness-and-remedy (byeongyak 病藥)

It first finds the character that causes the most trouble in the chart (the illness), then takes the element that keeps it in check (the remedy) as the Useful God. It's a perspective used when a single excessive element is breaking the balance.

How are the Favorable, Unfavorable, Enemy and Idle Gods set?

Once the Useful God is set, the other four follow from the generating and controlling relations of the Five Elements. All you need to know are the generating cycle (Wood→Fire→Earth→Metal→Water→Wood) and the controlling cycle (Wood→Earth→Water→Fire→Metal→Wood).

Each of the five elements goes into one of the five names. If only the Useful God changes, the whole table turns by the same rule, so finding the Useful God is essentially everything.

Shall we find the Useful God in an example chart?

Let's continue with the hypothetical chart assessed in the strong-and-weak Day Master article: Im-in year, Imja month, Gap-o day, Gyeong-o hour — a Gap Wood (甲) Day Master born in deep winter.

1. Strengthen-or-restrain — it has seasonal support and numerical support, so it leans strong. The draining elements, Fire (Output), Earth (Wealth) and Metal (Officer), are candidates.
2. Climate-balancing — in the deep winter of the Rat month (Jawol 子月), there are three Water characters. It's cold, damp wood, so it needs warming with Fire (火).
3. The overlapping element — the strengthen-or-restrain candidates and the climate-balancing answer both point to Fire. The Useful God is Fire, and the two O (午) characters in the birth chart are playing that role.

By the table's rules, the Favorable God is Wood, the Unfavorable God Water, the Enemy God Metal and the Idle God Earth. It makes sense that Water is the Unfavorable God in this chart — there's already plenty of water, and it's the side that puts out the Fire.

Is the element I lack my Useful God?

No. It's the most common misconception. The Useful God isn't the empty element but the element needed for balance.

For example, say a chart with a weak Wood Day Master has no Earth at all. To a Wood Day Master, Earth is the Wealth star, a draining element that demands effort. Adding Earth to an already weak chart only wears it out more. In this case, Earth isn't the Useful God even though it's missing, and it could even be the Unfavorable God.

The idea of "filling in what's missing" works well for light, day-to-day top-ups — like making up for the element you lack with a meal. But the lifelong Useful God is set only after weighing strength and temperature first.

Why does the same chart yield different Useful Gods?

The Useful God is closer to a judgment than a calculation, so knowing where opinions diverge reduces confusion.

Priority of methods

It's about which one you put first when strengthen-or-restrain and climate-balancing point to different elements. Even for the same chart, this single choice changes the Useful God.

The strong/weak boundary

For a chart whose strength is ambiguous, the strengthen-or-restrain Useful God can flip to the exact opposite depending on the judgment. This follows directly from why strength assessments differ between apps.

Definition of the Favorable God

As seen above, some fix the Favorable God as "the element that generates the Useful God," while others adjust it to the chart's situation.

Hour pillar and corrections

If you don't know your birth time, two characters drop out, and if the hour pillar changes depending on how daylight saving time or the late Ja hour is handled, the element makeup changes too.

If you got different results, check "Which method was used?" rather than "Which one is wrong?" It's worth being a little skeptical of a reading that declares a Useful God without explaining its reasoning.

How do I use my Useful God's element in daily life?

Many people use the colors, numbers, directions and seasons associated with their Useful God's element as everyday markers.

A more practical use is as a standard for reading timing. When your Useful God's element arrives in your 10-year luck cycle (Daeun) or that year's stem-branch pair (annual luck), it's read as a good time to use that energy; when the Unfavorable God's element arrives, as a time to adjust your pace. For example, in 2027, the Jeongmi year, Jeong (丁) is Fire and Mi (未) is Earth, so it's seen as a welcome year for people whose Useful or Favorable God is Fire or Earth.

The lucky color of the day, which changes daily, is set by that day's iljin, so its starting point differs from the Useful God color. The Useful God color is the energy you always need; today's color is the energy matched to today's rhythm. Both are best used not as something that changes the outcome but as a marker to steady yourself on an important day.