Day Pillars › Jia Zi
Jia Zi 甲子 Day Pillar · Gapja
Jia Zi is the first of the sixty day pillars, the pairing that sets the whole cycle in motion. Picture a young pine with its roots in a cold, clear stream, drawing up everything it needs before spring arrives.
- Day Master (stem)
- 甲 Jia · Yang Wood
- Spouse palace (branch)
- 子 Zi · Water Rat
- Hidden stems
- 壬 Ren (Indirect Resource) · 癸 Gui (Direct Resource)
- Twelve stage
- 沐浴 · 목욕 Bathing
- Na Yin
- 海中金 Gold in the Sea
- Void (공망)
- 戌亥 Dog and Pig
- Image
- A young pine above a winter stream
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What is the Jia Zi (甲子) day pillar like?
Here Yang Wood stands on the Rat branch, which is pure Water. In the five-element cycle Water feeds Wood, so the Day Master sits directly on its own source of support. The branch holds two hidden stems: 壬 Ren, which counts as Indirect Resource, and 癸 Gui, the main stem, which counts as Direct Resource. A day branch made entirely of Resource gives the pillar a strong inward current of learning, reflection and absorbed experience. Little in the branch pulls against the tree; the open question is whether the chart also offers sun and soil so that nourishment turns into visible growth.
In Korean the pillar is 갑자 (Gapja), and its first syllable is also the word for “first rank” (as in 갑을, gabeul). People born on a Gapja day are pictured as the young pine above winter water: upright, curious and fed by ideas more than by applause. They like to understand a thing completely before acting on it, and many keep a private library of notes, sources or half-finished plans. There is a gentle idealism here, a belief that growth is always possible. The cold stream also explains a reserved first impression; warmth arrives once trust is established, and then it lasts.
What does the twelve-stage position mean for Jia Zi?
On the 子 branch, 甲 Wood stands in the 沐浴 (목욕, mogyok) stage, called Bathing. In the twelve-stage cycle this is the moment just after birth when a young life is washed and shown to the world. It is read as freshness, sensitivity to surroundings and a certain restlessness, the energy of someone still testing which style fits best.
What is the Na Yin of Jia Zi?
The Na Yin of Jia Zi is 海中金, Gold in the Sea: metal resting beneath deep water, valuable yet out of sight. Treat it as a mood rather than a rule: a hint that this pillar's best qualities may surface slowly and reward patience.
How does Jia Zi approach close relationships?
The day branch is the spouse palace (배우자궁, baeujagung), the seat of close partnership in a chart. For Gapja, its main hidden stem 癸 is Direct Resource, the Ten God of care, shelter and steady support. Readers take this as a sign that partnership feels most natural when it works like a home base: a place to rest, learn and be understood. Gapja values a partner who listens and remembers details. The growth point is reciprocity, making sure support flows both ways and that the young tree also offers shade in return.
How does Jia Zi work best?
Gapja works best where learning is part of the job description. Research, teaching, editing, curriculum design, archives, translation and long-range planning all suit a pillar that runs on absorbed knowledge. It prefers a clear purpose and enough time to do things properly, and it can grow restless in roles that reward speed over depth. Pairing with action-minded colleagues helps Gapja turn well-researched ideas into finished work.
What are the strengths and blind spots of Jia Zi?
- Deep learner — Gapja absorbs ideas thoroughly and builds understanding that holds up when the questions get harder.
- Principled outlook — like a straight young pine, it keeps a consistent sense of right and wrong.
- Fresh perspective — the Bathing stage brings openness to new methods, new places and new people.
Things to watch
- Overpreparing — waiting for complete knowledge can delay good work; a smaller first step keeps momentum alive.
- Slow to open up — sharing a little earlier helps others see the warmth behind the reserve.
- Leaning on support — asking what others need in return keeps relationships balanced and generous.
Which day pillars are related to Jia Zi?
Same Day Master: 甲戌 Jia Xu, 甲申 Jia Shen, 甲午 Jia Wu, 甲辰 Jia Chen, 甲寅 Jia Yin.
Heaven-and-earth combination (천지합): 己丑 Ji Chou — its stem combines with 甲 and its branch forms a six-harmony pair with 子, a pairing traditionally read as easy rapport. Compare two real charts on the compatibility page.
What does Gapja (갑자) mean in Korean Saju?
Gapja (갑자) is the Korean reading of 甲子, the first pair in the sixty-pillar cycle. 갑 (Gap) is Yang Wood and 자 (Ja) is the Rat branch, which carries Water. As a day pillar it describes someone whose core self is a young tree fed by cold, clear water: principled, studious and growing steadily toward the light.
Is Jia Zi a strong day pillar?
Jia Zi has built-in support, because the Rat branch is Water and Water nourishes Wood. Both hidden stems are Resource stars. Still, strength in Saju depends on the whole chart, especially the birth month. A Jia Zi born in winter may have plenty of water but want Fire for warmth, while in a summer chart the stream is especially welcome.
What is the void (공망) of the Jia Zi day pillar?
For Jia Zi the void branches, called 공망 (gongmang), are 戌 (Dog) and 亥 (Pig). Every ten-day group in the sixty-cycle leaves two branches without a stem partner, and those become empty for the pillars in that group. If 戌 or 亥 appears elsewhere in your chart, its theme is said to feel lighter and less fixed, a space you fill with your own effort.
For entertainment and self-reflection only. Saju describes tendencies, not fixed outcomes, and nothing here is professional advice. Twelve stages, Na Yin and void branches follow standard Korean and Chinese almanac tables (checked against the independent library lunar-python); background: Sexagenary cycle (Wikipedia). Updated October 7, 2026.