What are the Yin Chart and Yang Chart?
Sanmei-gaku reads a birth chart through two perspectives: the Yin Chart and the Yang Chart. The Yin Chart reads stems, branches, hidden stems, and elemental balance as the inner structure of fate. The Yang Chart places the Ten Major Stars and Twelve Supporting Stars into a body diagram to read how that structure appears in personality and behaviour.
Contents
Inner and outer sides of one chart
The Yin Chart reads the year, month, and day pillars themselves: heavenly stems, earthly branches, and hidden stems. It deals with inner qualities, elemental bias, family background, and structural conditions that are not always visible from the outside.
The Yang Chart converts relationships in the Yin Chart into stars, then places those stars in a body diagram. The Ten Major Stars describe personality tendencies and behaviour, while the Twelve Supporting Stars show energy level and life-stage posture.
The two are not separate systems. The Yin Chart is like a root or skeleton, while the Yang Chart is the visible branch, face, and behaviour in human relationships.
| Day Pillar | Month Pillar | Year Pillar | |
|---|---|---|---|
| Stem | 壬Day MasterYang Water | 甲Month stemYang Wood | 戊Year stemYang Earth |
| Branch | 午Day branchHorse | 寅Month branchTiger | 戌Year branchDog |
| Hidden stems | 己丁 | 戊丙甲 | 辛丁戊 |
* The above is an example to illustrate the structure. Actual charts differ by birth date.
The Yin Chart as the form received at birth
In a spiritual reading, birth can be seen as a crossing from the unseen shore into this world. The Yin Chart symbolically records the pattern of qi received at that moment.
This worldview can include reincarnation: moving from a previous life into this life, and eventually from this life toward a future life. The chart is not proof of past or future lives, but it can be read as a symbolic map of the themes the person carries into this world.
The heavenly stems show the qi descending from heaven, the earthly branches show time and seasonal coordinates, and hidden stems show the elemental qi contained inside those branches.
What the Yin Chart reads
The day stem, or Day Master, is the starting point. It shows which elemental quality the person uses as their core when meeting the world.
The chart then reads how the other stems, branches, and hidden stems gather, lack, support, or restrict one another. This reveals the flow of qi, elemental bias, and the person's relationship with family, society, and home.
Phase analysis also belongs mainly to this domain. It reads how branches combine, scatter, collide, or create tension inside the chart and in timing cycles.
Generation: Wood → Fire → Earth → Metal → Water → Wood (wood fuels fire, fire produces ash/earth, earth yields metal, metal condenses water, water nourishes wood)
Restriction: Wood → Earth → Water → Fire → Metal → Wood (wood depletes earth, earth dams water, water extinguishes fire, fire melts metal, metal cuts wood)
The Yang Chart as visible expression
The Yang Chart makes the inner structure easier to read as human behaviour. If the Yin Chart is root and frame, the Yang Chart is expression, action, and interpersonal style.
The Ten Major Stars are derived from relationships between the day stem and other stems. They are placed in the centre, north, east, west, and south of the body chart.
The Twelve Supporting Stars are derived from relationships between the day stem and the branches. They show how strong, young, mature, delicate, or fast the energy feels across life stages.
The major star placed at the chest (center) is the central star — the one that most strongly represents the person's essential nature.
Reading both together
The Yang Chart is easy to understand because the stars have names. But reading only the stars can become superficial if the Yin Chart is ignored.
Conversely, the Yin Chart can show structure without making it obvious how that structure appears in everyday behaviour. Reading both together connects the reason and the appearance.
A person with strong Water in the Yin Chart and many learning-related stars in the Yang Chart, for example, may naturally express themes of knowledge, movement, inquiry, and adaptation.
FAQ
Which is more important, the Yin Chart or the Yang Chart?
Both are important. The Yin Chart shows inner structure, while the Yang Chart shows outward expression. Reading both together gives a more natural interpretation.
Can the Yang Chart alone describe personality?
It can give an accessible entry point, but it can become superficial without the Yin Chart. Elemental balance, hidden stems, and phase relationships give the stars context.
What are hidden stems?
Hidden stems are heavenly stems contained inside each earthly branch. They show deeper elemental qi within the branch and are important for Yin Chart analysis.
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