Jia 甲, the Yang Wood Day Master

The tree that reaches the sky

The classic 滴天髓 opens its line on 甲 with four characters, 甲木參天: Jia wood reaches up to the sky. The note printed under the verse calls it trunk-and-root wood, pure yang, tall and robust (滴天髓, 天干論). 三命通會 adds a second picture: 甲 is the first of the ten stems, thunder and the dragon in the sky, beams and pillars on the ground (三命通會, vol. 2).

Put together, the two books describe one thing from two sides: something that grows in a single direction and ends up holding weight. Modern Korean teaching keeps the tree. One Korean course calls 갑목 a big tree, a pine or a ginkgo, that wants to grow tall, stands straight and casts shade around it (정해 만세력 lecture 05). In a person, readers take that as a habit of going straight at things, of thinking in long timelines, and of becoming, sometimes without meaning to, the thing other people lean on.

In a job, that often looks like the person who asks for the long plan and a clear line of responsibility, and who gets restless in roles that only keep things running. With friends and partners it looks like loyalty and protection, and a certain slowness to bend: the tree gives shade, but it doesn’t move to where you are standing.

Line by line: how 甲 meets the other elements

The rest of the 甲 verse is a small manual for how this Day Master behaves among the elements. Each line below gives the classical text, what the commentary adds, and the tendency modern readers draw from it, with the ten-god names our engine gives each stem (the ten gods).

• Fire, 脱胎要火 (“to shed its husk it needs fire”): 丙 and 丁 are your Eating God and Hurting Officer. The commentary says strong wood that gets fire flourishes all the more. The tendency: a 甲 person’s growth shows once it has an outlet, a thing to make, teach or say out loud.
• Metal, 春不容金 (“in spring it won’t tolerate metal”): 庚 and 辛 are your Seven Killings and Direct Officer. 三命通會 supplies the other half: 甲 is timber that becomes a useful vessel only once an axe has shaped it. The tendency: pressure and critique improve 甲, but a 甲 already sure of itself pushes back hard.
• Earth, 秋不容土 (“in autumn it won’t tolerate earth”): 戊 and 己 are your Indirect Wealth and Direct Wealth, and 甲 with 己 is one of the five stem combinations. The tendency: 甲 manages ground well when it is rooted, and spreads itself thin over too much of it when it isn’t.
• Water, 水蕩騎虎 (“when water floods, ride the tiger”): 壬 and 癸 are your Indirect Resource and Direct Resource. Water feeds wood, but the image is a tree in a flood. The commentary’s answer is 寅, the Tiger branch, where 甲 has its root. The tendency: study and support help 甲 right up until they become a reason not to start.
• Too much fire, 火熾乘龍 (“when fire blazes, ride the dragon”): the commentary’s answer here is 辰, the Dragon branch, a store of water that damps fire and keeps the roots moist. The tendency: 甲 can overextend on its own output and does better with a cool, steady base.
• Other wood: 甲 is your own Friend and 乙 your Rob Wealth. 滴天髓’s line for 乙 pictures a vine tied to 甲. The tendency: people climb on 甲’s steadiness, and 甲 allows it more often than it admits.
• The last line, 地潤天和，植立千古: with moist ground and a mild sky, it stands for a thousand ages. The verses for 乙 and 丁 end on seasons (可春可秋, 可秋可冬); 甲’s is the only one in the chapter that ends on ages, and it is a fair summary of 甲’s real strength: not speed, but staying.

What every other stem is to a 甲 Day Master

The ten gods name what each stem is to you. For 甲 the list is the textbook one, because the classical handbooks used 甲 as their worked example: 淵海子平 starts with 甲 itself as Friend (比肩) and ends with 癸 as 印綬, the older name for Direct Resource (淵海子平). If you are a 甲 Day Master, the tables in older books are written from your seat.

The same stems also sit inside branches, so a 甲 chart can hold a Direct Wealth it doesn’t show on top. The row below is identical for every 甲 person; which of these roles your chart actually contains is what the rest of the reading works out.

The six 甲 day pillars

甲 sits on six of the twelve branches, one in each ten-day run of the sixty-day cycle, and each pairing has its own page. The twelve-stage column shows how the tradition pictures 甲 in that branch, from 建禄 (steady self-reliance) on the Tiger to 死 (quiet focus) on the Horse. The names are metaphors for a phase, not events (the twelve stages).

Two of the six appear in the 甲 verse itself. 甲辰 Wood Dragon is the Dragon the verse says to ride when fire blazes, and 甲寅 Wood Tiger is the Tiger to ride in a flood, so in the verse’s own terms these two carry their own remedy. The other four are 甲子 Wood Rat, 甲戌 Wood Dog, 甲申 Wood Monkey and 甲午 Wood Horse.

The Korean angle: 갑, first in line

In Korean the stem is 갑 (gap), and saju practitioners say 갑목, “gap wood,” naming stem and element together (정해 만세력 lecture 05). Korean contracts call the first and second parties 갑 and 을, and in practice 갑 came to mean the party with the upper hand; the slang 갑질 (gapjil), bossing people around from that position, grew out of it (Korea Herald; Wikipedia: Gapjil).

A 갑목 Day Master is not a 갑질 personality; that’s a pun, not a reading. It is still a handy mirror for the shadow readers describe in 甲: the first-in-line, I-know-the-way habit that helps a team until it stops listening. The cycle of sixty pillars is named for 甲 too. Korean calls it 육십갑자, and the 60th birthday, 환갑 (hwangap), means coming back around to that 甲 (환갑). The most recent 甲 year had a Korean name of its own: 2024, 甲辰, was 청룡, the Blue Dragon (Korea.net).

Jia and 2027 (丁未)

In 丁未, the year stem 丁 is your Hurting Officer and the Goat branch’s main stem 己 is your Direct Wealth. The branch also holds 丁 again and 乙, your Rob Wealth. The twelve-stage table puts 甲 at 墓 (collecting and keeping) in 未; in 三命通會’s life-cycle metaphor that stage is also called 庫, the storehouse where things are gathered in (三命通會, vol. 2).

Hurting Officer is the ten god of the red pen, Direct Wealth the ten god of the ledger. For a tree, that is an odd pair of tools: a year that invites you to say exactly what you think and to count exactly what you have. Horan’s question for 甲 in 2027: can you deliver the critique once, then spend the energy on the ground you already own? It’s a prompt for reflection; nothing here predicts what the year will bring, and the 2027 page has the other nine Day Masters.

About this page

Written with AI (Claude) from the sources listed and our calculation engine. Horan and Kachi are fictional characters, and nothing here predicts events. The rules behind every chart: how we calculate.