What Are the Earthly Branches? The Twelve Branches (Ja, Chuk, In, Myo…) and Their Place in Your Saju

The four characters in your Saju (Four Pillars of Destiny) that carry the energy of earth are called the Earthly Branches (地支). There are twelve of them — Ja (子), Chuk (丑), In (寅), Myo (卯), Jin (辰), Sa (巳), O (午), Mi (未), Sin (申), Yu (酉), Sul (戌), and Hae (亥) — and they stand for the "ground" of our lives, the real-world stage on which we live. In a Saju chart, one branch sits in each of the four positions — the Year Branch, Month Branch, Day Branch, and Hour Branch — and together they serve as a reference for understanding the environment you were born into and the potential traits you carry.

What do the Earthly Branches mean in Saju?

A Saju chart is built by drawing eight characters from the year, month, day, and hour of your birth. The four on the lower row are the Earthly Branches. Each branch pairs with a Heavenly Stem above it to form the Sixty Gapja (the sexagenary cycle), and each one corresponds to a zodiac animal, an hour of the day, a season, and a direction. Ja (子), for example, is the Rat and Chuk (丑) is the Ox; as a season Ja is winter, and as an hour it marks the window from 11 p.m. to 1 a.m. In this way the Earthly Branches act like a mirror, reflecting the real-world circumstances a person stands within and the tendencies that surface there.

Each branch also holds Heavenly Stems concealed inside it — the hidden stems — so it reveals not only the surface but the latent energy within. In standard Saju practice this is one of the key elements of a reading: it helps you understand a person's innate temperament, the environment they grew up in, and the many situations they may meet in real life, from more than one angle. The Earthly Branches carry a layered meaning that reaches well beyond your zodiac sign; they show the blend of forces at work in a life. To understand Saju more deeply, it helps to explore what a Saju chart is as a whole alongside this.

The Earthly Branches and the seasons — the boundary is the solar terms

The Earthly Branches are paired with the seasons and hours, and the Month Branch (月支) in particular marks the season you were born into. Here a common misunderstanding creeps in: the boundary between seasons is not January 1st or the first of each month, but the solar terms (節氣). Even the start of the year falls on Ipchun (立春, the Start of Spring, usually around February 4th), so someone born in early February — but before Ipchun — is assigned the branches of the previous year. Generic AI and simplified perpetual calendars tend to flatten these solar-term boundaries into plain calendar dates, which throws off the Month Branch (and with it, the zodiac sign) from the very start. Gwiraedang pins the moment each solar term begins down to the minute through astronomical calculation (our own deterministic Ten-Thousand-Year perpetual-calendar engine), so the branches are set precisely — because for a birth that falls right on the boundary, that single minute can decide the whole reading.

How can I find the Earthly Branches in my own Saju?

You can easily check your own Earthly Branches with a Ten-Thousand-Year perpetual calendar (manseryeok). Enter your birth year, month, day, and hour, and you'll see the eight characters that make up the Year, Month, Day, and Hour Pillars; the character on the lower half of each pillar is its Earthly Branch. If a chart reads "Gapja year, Eulchuk month, Byeongin day, Jeongmyo hour," then Ja (子), Chuk (丑), In (寅), and Myo (卯) are the Year, Month, Day, and Hour Branches respectively.

These four branches offer insight into a person's innate tendencies and the real-world areas of their life. The Year Branch tends to point to the larger frame of one's environment, such as ancestors or country; the Month Branch to parents, siblings, and one's working environment; the Day Branch to a spouse and one's inner self; and the Hour Branch to children, the shape of later life, or personal potential. Checking your own branches with a perpetual calendar and reflecting on what each one means can be a useful reference as you come to understand yourself and explore your direction in life.

FAQ

Are the Earthly Branches the same thing as your zodiac animal (띠)? No. The Earthly Branches are the twelve characters that carry the energy of earth in a Saju chart, while your zodiac animal is the animal tied to just one of them — the branch of your birth year (the Year Branch). Ja (子), for instance, is one of the Earthly Branches, and the zodiac animal that corresponds to it is the Rat.

What influence do the Earthly Branches have in a Saju reading? The Earthly Branches represent the real-world environment a person stands in and the "ground" of their life. Each branch corresponds to a particular energy, season, hour, and direction, and together they serve as a reference offering insight into someone's innate tendencies, family relationships, social life, and potential.

Saju is not a fixed destiny — it's a tool for self-reflection, not fortune-telling.