Meaning of the Gap-Shin (甲申) Ilju — Personality, Structure, and the 21st Pillar of the Sexagenary Cycle
The Gap-Shin (甲申) Ilju is the 21st pillar of the sexagenary cycle. It represents the Heavenly Stem Gap (Yang Wood), a giant tree reaching straight toward the sky, sitting upon the Earthly Branch Shin, the talented monkey. It is the image of a pine tree rooted in a rocky cliff—a figure that becomes stronger in difficult terrain.
At a Glance
| Category | Content |
|---|---|
| Hanja | 甲申 |
| Composition | Heavenly Stem Gap (Yang Wood) + Earthly Branch Shin (Year of the Monkey, Metal) |
| Nabeum Five Elements | Cheonjungsu (泉中水, Spring Water) |
| Ilji 12 Stages of Life | Jeol (絶, Extinction/Severance) |
| Ilji Ten Gods (Main Qi) | Pyeongwan (偏官, Seven Killings) |
| Corresponding Years | 1944 · 2004 |
| Core Keywords | Challenge, Ingenuity, Quick Wit |
Personality and Temperament
The Gap-Shin Ilju is a challenger type forged in environments full of change. As it occupies the position of Jeolcheobongsaeng (絶處逢生—finding life in the midst of death/severance), it finds a way out of every crisis and is quick to act.
- Strengths: Ability to break through crises, quick wit, and survival skills in harsh environments.
- Points of Caution: Life tends to be subject to frequent changes. Finding a single place to set down roots is the key to stability.
Reading the Structure — Myeongri Interpretation
The Gap (甲) Day Master sits atop the Shin (申) Earthly Branch. Based on the main qi of the Ilji (Day Branch), the Ten God is Pyeongwan (偏官), and the 12 Stages of Life is Jeol (絶). Pyeongwan is the star of challenge and responsibility—it creates a strong vessel that is tempered by enduring pressure. Because it is in the position of Jeol, it is a dynamic structure characterized by repeated changes and comebacks.
In terms of Nabeum Five Elements, it belongs to Cheonjungsu (泉中水), a classification frequently used in traditional Myeongri alongside other pillars sharing the same Nabeum.
Learn More
- Curious about your own Ilju? Saju Calculator (oiyo.net)
- View all Heavenly Stems, Earthly Branches, Ten Gods, and 12 Stages of Life: Saju Encyclopedia
- View all 60 pillars of the sexagenary cycle at a glance: Sexagenary Cycle Ilju Dictionary
The Ilju is the central axis of the Four Pillars, but it is only two of the eight characters. Its manifestation varies greatly depending on its relationship with the other characters, so please use this as a starting point for self-understanding.
OIYO Research Team
Research TeamThe OIYO research team structures material from psychometric scales, statistics, and academic literature. We name both the popular framing and its scholarly limits, so each guide works as a tool for reflection rather than a verdict.