Not who you are. How you deal with people.
Personality tests hand you an adjective and leave you with it. Saju is older and more specific: a 700-year-old language for the way you approach someone, what you give, what you want back, and where it reliably goes wrong. Your chart comes back as a relational manual — including the part you can hand to somebody else.
Saju is not another personality quiz — it is what Koreans have consulted for centuries when reason alone runs out. Pick what is actually on your mind and your reading leads with it.
Your chart is computed by a verified Four Pillars engine — historical Korean time-zone changes, wartime daylight saving, and true solar time for your exact birthplace are all applied before a single character is drawn. Pick your birthplace on the globe and you can watch the correction change as you move. Every line of your reading shows the number it came from.
Compatibility reads two charts against each other across element chemistry, Day Master bond, spouse palace, mutual roles and star resonance — then tells you what the two of you actually do to each other, and which role each of you plays for the other. A score is the least interesting thing on the page.
Check a compatibility →Save your chart and SajuSis reads it against each day's own pillar (일진) — how today lands on your dealings with other people, and a straight answer when you are weighing something small enough that nobody wants to hear about it.
See today's reading →We read public birth charts out loud — K-pop idols, historical figures, anyone whose birth date is on the record — and explain what the Four Pillars actually say and why. Editorial commentary, not prediction. New posts regularly, in multiple languages.
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