Why do some people notice the one flaw in a perfect room? In saju that is yin metal, 辛: the jewel and the fine blade, already refined, and sharply aware of quality in everything.
Your day master (일간, ilgan) is the heavenly stem of your birth day, the character that stands for you in a saju chart. Yin Metal (辛, 신금) is the jewel. The classical text Jeokcheonsu (滴天髓) opens its verse on this stem with 辛金軟弱: “Yin metal is soft and delicate.”
What is a yin metal day master like?
Yin metal is refined, precise and aesthetic. Readers describe a person with high standards, a sharp eye and a strong sense of self-worth. The classical verse calls 辛 “soft and delicate, warm, moist and clear”: a jewel does not want to be hammered again. It wants to be polished and shown in good light. That makes yin metal sensitive to criticism and to rough treatment, and very good at anything that needs taste and accuracy.
What are the strengths and weak spots of yin metal?
Strengths
- Precision and quality control
- Aesthetic judgement
- Composure in public
- Independent thinking
Watch for
- Perfectionism and self-criticism
- Sensitivity to slights
- Coolness that reads as distance
- Pride in appearances
What work suits a yin metal day master?
Yin metal suits work where quality is the point: finance, editing, audit, jewellery, fashion and beauty, design, dentistry, analysis, luxury and curation. It is drained by sloppy environments and coarse management. For the other nine day masters side by side, see career fit by day master.

How does yin metal love?
Yin metal is discerning and loyal once it has chosen. It notices how it is treated, in detail. It needs gentleness and a partner who values it as it is. Criticism lands harder than intended; appreciation goes further than expected.
In the stem tables 辛 combines with 丙 (Yang Fire), one of the five classic stem pairings. A partner whose day master is 丙 is traditionally read as a natural pull, though the rest of both charts decides whether the pull is comfortable.
How do the other elements read for a yin metal day master?
In saju every other element in your chart is named by its relationship to you, the ten gods (십신). For yin metal the map looks like this:
| Element | Is your… | Stands for |
|---|---|---|
| Metal | Companions (비겁) | peers, siblings, rivals, independence |
| Water | Output (식상) | expression, skill, children, creativity |
| Wood | Wealth (재성) | money, resources, and for men traditionally a partner |
| Fire | Officer (관성) | authority, structure, reputation, and for women traditionally a partner |
| Earth | Resource (인성) | learning, support, mothers and mentors, rest |
Why can two yin metal people be so different?
Because the day master is one character out of eight. A yin metal born in a season of its own element is “strong” and does best when it spends energy; one born in a season that drains it is “weak” and does best with allies and structure. The month of birth, the other pillars and the ten-year luck cycle all change the advice. Compare with its sibling, Yang Metal (庚), or start from what a day master is.
Master Haewol reads your day master with its strength, season and luck cycles in her Classical Saju reading; you see your chart before you pay.
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