Saju vs MBTI
MBTI is a self-report questionnaire — you answer questions and get one of 16 types. Korean Saju (四柱, Four Pillars) is the opposite: there's nothing to answer. Your chart is computed from the exact date, time and place of your birth, giving eight characters mapped onto the Five Elements and Ten Gods. MBTI describes how you think; Saju describes the raw material you were born with — and unlike a fixed type, it moves through time via ten-year luck cycles.
| MBTI | Saju (사주) | |
|---|---|---|
| How you get it | Answer a questionnaire | Computed from birth date · time · place |
| Output | 4-letter type (e.g., INFJ), 16 types | 8 characters · Five Elements · Ten Gods |
| Stability | Can change between tests / moods | Birth chart is fixed; luck cycles change over time |
| Basis | Self-perception | Astronomy + calendar (deterministic) |
| Best for | How you process & relate | Innate tendencies, timing, balance of elements |
Is Saju more accurate than MBTI?
They measure different things, so it isn't a contest. MBTI captures how you see your own thinking; Saju is computed from your birth moment and points at innate tendencies and timing. Neither is a scientific prediction — both are lenses for self-reflection. Saju's advantage is that there's nothing to self-report, so it can surface blind spots MBTI's questions don't reach.
Can I use Saju and MBTI together?
Yes — many people do. Read your MBTI for communication style and your Saju Day Master and Five-Element balance for innate drives and timing. They overlap and complement: a 'thinking' MBTI type with a Fire-heavy chart, for example, reads differently from the same type with a Water-heavy chart.
Do I need my birth time for Saju?
It helps a lot — the hour pillar (one of the four) needs your birth time. Without it you still get three solid pillars; Gwiraedang simply leaves the hour blank rather than inventing one. You don't answer any questions either way.
You know your MBTI — now meet your Saju
Nothing to answer. Computed from your birth date, time and city. Free.
See my Saju