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Day Pillar 21 of 60 · Nayin Spring Water

Jia Shen (甲申) Day Pillar — Yang Wood on the Monkey

The Jia Shen day pillar pairs the Jia day master (Yang Wood) with the Shen branch (Metal, the Monkey). Below: the computed facts, what the seat relation and twelve-stage position mean structurally, the nayin gloss, the classical reading of the spouse palace, and an instant lookup for your own pillar.

Computed facts (engine-verified)

This page is generated from the engine, not hand-written; structural facts reconcile against the methodology page.

Day master甲 Jia · Yang Wood
Day branch申 Shen (Monkey) · Metal
Hidden stems庚 Geng (Seven Killings, main qi); 壬 Ren (Indirect Resource, middle qi); 戊 Wu (Indirect Wealth, residual)
Stage of the stem hereExtinction (10 of 12)
NayinSpring Water · 泉中水 (shared with Yi You 乙酉)
Seat relationBranch controls stem (jie jiao) — traditional term: 截脚

How Jia sits on Shen

The branch controls the stem: Metal bears down on Wood, so the Jia day master sits under pressure from its own base. The traditional name is 截脚 (jié jiǎo, "cutting the heel") — the seat pushes back against the self. Structurally this means the day master cannot take its own ground for granted; it is a pillar where the base tests the person, and the full chart shows what resources answer that test.

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Nayin: Spring Water

Spring Water (泉中水): spring water — a steady source, not a flood. Reliability of supply is the theme.

The spouse palace (day branch)

In the spouse palace this is an Influence (官杀) configuration: the classical reading treats the partner-side branch as a source of structure, accountability, or pressure on the Jia day master. The structural point — stated by the tradition, not by this site — is that intimacy here comes with terms attached. Whether those terms read as support or as strain depends on the other seven characters, which is why this page stops at structure.

The main qi 庚 (Geng, Seven Killings) defines the palace's classical group: Influence. Middle/residual tenants: Ren (Indirect Resource), Wu (Indirect Wealth).

A note on what this page deliberately does not do: the internet is full of "60 personality types" tables that assign a fixed character to each day pillar. This site rejects that framing. A day pillar is a structural position — who sits where, on what kind of ground, with which hidden tenants. The same pillar reads differently under a different month command, and no meaningful judgement exists without the other six characters. Where the tradition offers a reading, it is labelled as the tradition's; this site's own contribution is that every number and term on this page is computed, versioned, and checkable against the methodology page.

Find your own day pillar

Birth date alone is enough — the day pillar never needs a birth time. The calculation runs in your browser; nothing is sent anywhere.

Frequently asked

What is the Jia Shen (甲申) day pillar?
The Jia Shen day pillar pairs the Jia stem (Yang Wood) with the Shen branch (Metal). Its computed facts: hidden stems Geng (Seven Killings), Ren (Indirect Resource), Wu (Indirect Wealth), the Jia stem at the Extinction stage on this branch, seat relation "undefined", and nayin Spring Water (泉中水).
How do I find my own day pillar?
Use the calculator on this page (birth date is enough — the day pillar does not need a birth time) or the full chart calculator. Your day pillar is the third pillar of the four; each of the sixty has its own page on this site with the same computed structure.
Is the Jia Shen day pillar good or bad?
Neither, on its own. The seat relation (undefined) and the Extinction stage describe position and flow, not fortune. A meaningful reading needs the month command and the other six characters — any source that grades pillars as lucky or unlucky is simplifying past what the system itself claims.
What does the nayin Spring Water mean?
Nayin (泉中水) is a two-thousand-year-old classification that gives each PAIR of pillars a symbolic element-image — for Jia Shen it is "Spring Water", shared with its partner pillar Yi You (乙酉). It is a classical gloss layer, published here alongside the structural facts, never instead of them.

Nearby pillars

The other five pillars sharing this day master (Jia):

Jia Zi · Jia Xu · Jia Wu · Jia Chen · Jia Yin

Gui Wei ←  ·  → Yi You

Reference index

Every enumerable component of ba zi has its own page here. Each page is computed by the same engine and can be checked item by item — none of it is a personality table.