Your Destiny Code,
decoded by an advanced Saju engine.
518,400 unique birth structures. 562 classical sources. Multi-LLM cross-analysis. RimSaju Engine reads your structure — not your sign.
Launched April 2nd — chosen by users in 50+ countries. Rimfactory builds the world's most precise Saju engine, and offers Saju in 10 languages — a world first — free to begin.
🔖 Compatibility with your favorite celebrity
Hi, I'm Chandler, founder of Rimfactory — always trying to build what you actually ask for. I recently tried it myself with a K-pop idol I admire, and it was fun. I figured a lot of you might be doing the same. We thought about curating celebrity birth data so you could pick directly — but for a company at this stage, holding the birth records of living public figures comes with some legal risk. Instead, here's a Wikipedia link. Look up your favorite person's birth date and time, enter them, and the RimSaju engine handles the rest. There's some fun in finding the data yourself, too. To everyone using SajuAstrology through Google and ChatGPT search recommendations — and we don't even have social channels yet — thank you. Once we close our seed round and the company is steadier, we'll get proper licensing and build the celebrity compatibility feature. Until then, stay with Rimfactory.
Search on Wikipedia →✨ iOS app — new version coming soon
— Soram · Reader of 5,000-year patterns —
How It Works
Three simple steps to unlock your cosmic blueprint
Enter Your Birth Moment
Your exact date, time, and city of birth. We calculate True Solar Time for precision.
Decode Your Four Pillars
Our engine maps the cosmic energy state at your birth into 8 characters across 4 pillars.
Receive Your Cosmic Blueprint
Get a hyper-personalized analysis of your personality, career path, love life, and fortune cycles.
Built Different from Day One
Your clock says 2:00 PM. But the sun over Seoul is 32 minutes behind Tokyo's meridian. That 32 minutes can shift your Hour Pillar entirely. We correct for your city's longitude — most saju sites don't.
Other saju sites match your birth date to pre-written paragraphs stored in a database. We generate every reading from scratch — a multi-engine AI pipeline analyzes your unique Four Pillars in real time, with 5-stage fallback to ensure zero failures.
滴天髓 · 穷通宝鉴 · 子平真诠 · 渊海子平 · 格局论命 — 2,000+ years of theory, split into 562 passages, embedded as 1,536-dimensional vectors. Your birth chart is converted to the same vector space, and the most relevant classical insights are retrieved and woven into your reading. Every interpretation has a traceable source.
Your free reading is genuinely free — no credit card, no trial, no catch. If you want deeper analysis, it's a one-time $9.99 payment. You keep it forever. No monthly fees, no recurring charges.
Why Saju Is Different
See how K-Astrology compares to traditional Western zodiac
Western Zodiac
- 12 Types
- Based on sun position
- Monthly predictions
- Generic advice
- No source attribution
K-Astrology (Saju)
- 518,400 Types
- Based on full cosmic state
- Daily precision readings
- Hyper-personalized guidance
- Grounded in classical texts