Bias match
Korean Saju reads compatibility from two birth charts — not sun signs. Enter your birthday and see your match type with IU in 10 seconds. Free.
IU is The Forge Ember — a Yin Fire Day Master (the core element of their Four Pillars). That's the chart we'll read yours against.
| Pillar | Stem | Branch |
|---|---|---|
| Year | 癸 Gye · Yin Water | 酉 Yu · Rooster · Metal |
| Month | 丁 Jeong · Yin Fire | 巳 Sa · Snake · Fire |
| Day | 丁 Jeong · Yin Fire | 酉 Yu · Rooster · Metal |
| Hour | Unknown (birth time not public) | |
| Wood | Fire | Earth | Metal | Water |
|---|---|---|---|---|
| 0 | 3 | 0 | 2 | 1 |
Birthday: Korean Wikipedia and English Wikipedia give the same date (checked October 20, 2026). Pillars: Palja's manseryeok engine, year and month switching at the exact solar term.
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IU was born on May 16, 1993. IU's birth time is not public, so IU's Saju chart has three pillars (year, month and day) instead of four.
IU's pillars are 癸酉 (Gye-Yu) year, 丁巳 (Jeong-Sa) month and 丁酉 (Jeong-Yu) day. The Day Master is Yin Fire (丁 Jeong), and the six characters hold 3 Fire, 2 Metal, 1 Water, 0 Wood and 0 Earth.
Saju (사주, "Four Pillars") maps your birth date and time to five elements. Compatibility compares two people's day pillars — the part that rules relationships — to score chemistry, stability, growth and friction. IU's chart is fixed; yours is calculated live in your browser (your birthday never leaves your device).