In Korean saju, each of the twelve Earthly Branches looks like a single character on the surface — but tradition holds that hidden energies live inside it. These concealed energies are the jijanggan (지장간), the hidden stems. They are read to understand an element's true strength and rooting, the part of a chart you cannot see from the surface stems and branches alone. This guide explains what the hidden stems are, the three layers — yeogi, junggi and jeonggi — and why serious readings depend on them. It is a framework for reflection and self-understanding, not a forecast — and you can see the chart they are read from free, in plain English, in about a minute.
A saju chart has two visible layers in each pillar: the Heavenly Stem on top and the Earthly Branch below. The hidden stems are a third, concealed layer — Heavenly Stem energies tucked inside each branch. Because the twelve branches are understood to be built from the ten stems, every branch carries one to three of them hidden within.
Think of a branch as a sealed room: the surface tells you which room it is, but the jijanggan tell you who is actually inside. That inner content is what gives a branch its real elemental weight in a reading.
| Layer | Name | What it represents |
|---|---|---|
| Residual energy | Yeogi (여기) | Leftover energy carried over from the previous season |
| Middle energy | Junggi (중기) | Intermediate energy, often tied to an elemental combination |
| Main energy | Jeonggi (정기) | The governing energy that best represents the branch |
Not every branch has all three layers. The main energy (jeonggi) is always present and carries the most weight; yeogi and junggi appear depending on the branch. A branch with all three is read as richer and more layered than one with a single hidden stem.
Reading only the surface can be misleading. The hidden stems are where much of a chart's real detail lives:
One of the most important uses of jijanggan is checking whether your Day Master is rooted (tonggeun). Rooting means your Day Master's own element appears among the hidden stems of the branches, giving it support and stability underneath the surface.
Honesty matters in any reading. Hidden stems add depth and accuracy to how a chart is described, but they do not turn saju into a prediction. A well-rooted Day Master does not guarantee success, and a lightly rooted one does not rule it out — these are descriptions of structural strength within a reflective tradition, not forecasts of events. The jijanggan describe what is really in your chart, not what will happen in your life. They are not professional advice or a guarantee of outcomes.
Each branch carries between one and three hidden stems. The main energy (jeonggi) is always present; some branches add a residual (yeogi) and a middle (junggi) layer, while others carry only the main energy. Branches with all three are read as more layered than those with one.
No, but they connect. The hidden stems are concealed elements inside the branches; the Ten Gods are the relationships those elements have with your Day Master. Reading the hidden stems often reveals Ten Gods that are not visible on the surface, which is why the two are studied together. Learn the relationships in the ten gods (sipseong) guide.
The year, month and day branches each carry their own hidden stems and come from your date, so much of the picture is available without the hour. The hour adds one more branch with its own jijanggan. For more on this, read the guide to saju and birth time.
Right here. The free Cheonmyeongdang calculator turns your birth date and hour into your eight characters, Day Master, branches and Five Elements distribution in plain English — everything a hidden-stem reading starts from.