FAQ
Is this real fortune-telling?
Nope — KSaju is just for fun. Think of it as a personality toy with a Korean twist, not a prediction of your future.
What is saju?
Saju (사주) is traditional Korean four-pillars astrology. It reads the year, month, day, and hour of your birth as four “pillars,” each tied to one of the five elements (wood, fire, earth, metal, water).
How is compatibility calculated?
With classic five-element rules — which elements support or clash, and how the birth pillars meet. It's a transparent rule-based score, not random and not AI mysticism.
Do you store my birthday?
No. Your birthday is used in your browser to compute your saju. We only keep a coarse age range (like 18–24) for anonymous analytics — never your exact date. See our Privacy page.
Why K-pop idols? Where do their birthdays come from?
Because checking your chemistry with your bias is fun! Idol names and birthdays are public information. We don't use official photos or logos, and KSaju isn't affiliated with any artist or label.
Is it free?
Yes, completely free.
Can I share my result?
Yes — every result can be turned into a card image you can save and post. ✨
I found a mistake, or my favorite idol is missing!
We'd love to hear it. Reach us at hello@ksaju.me.