Sajunote is a consumer web service from South Korea that calculates a person's saju (Four Pillars of Destiny) chart from their birth date and time and writes a personalized reading with AI.
Users start with a free reading, and can buy in-depth analysis sections, a wealth report, long-form answers to their own questions, and the Book of Destiny (운명도감), a personal PDF report of 150+ pages.
The saju chart is computed by our own calendar engine, and every AI-written section is checked against that chart by automated quality gates before it is shown.
We build Sajunote with Claude Code and are moving report generation and quality review to the Claude API.
Sajunote (사주노트) · Founder & CEO Hyekyeong Han (한혜경) · Business registration 405-21-02469 · Mail-order sales registration 2026-화성동탄-0037 · Hwaseong, Gyeonggi-do, South Korea · help@sajunote.kr