About SajuLens

What is SajuLens?

SajuLens is a Saju (Four Pillars / 四柱八字) analysis service that combines centuries-old Eastern Saju theory with modern AI. From your birth date and time, we compute the heavenly stems (天干) and earthly branches (地支) of your chart, then analyze Five Elements balance, Ten Gods relationships, pattern (格局) and favorable element (用神) — turning that into insight on your innate temperament, aptitudes, wealth, health, and relationships.

Traditionally, Saju reading was the preserve of trained masters. SajuLens systematizes that expertise with AI so anyone can quickly understand their own chart, without needing prior knowledge of the theory.

How AI Saju analysis works

Analysis happens in two steps. First, we compute the precise four pillars from your birth time using the Manse calendar database — Year, Month, Day, and Hour pillars, each with its stem, branch, element, and yin-yang attributes.

Then AI interprets that configuration through Saju theory. Centered on your Day Master (日干), it reads how the other characters interact via the productive/controlling cycle (生剋制化), maps the distribution of the Ten Gods, and traces the major luck cycles (大運) and yearly luck (歲運) — combining all of this into a flowing, contextual reading rather than a checklist of keywords.

The AI is grounded in a wide body of Saju literature and case studies, so what you read is the depth of tradition delivered with the convenience of modern technology.

What makes it work

• Precise chart calculationManse-calendar based stem and branch computation with solar-term correction for accurate month pillars.
• Holistic AI readingFive Elements balance, Ten Gods analysis, pattern and favorable element, plus major and yearly luck cycles — woven into a single multi-angle reading.
• Privacy-respectingBirth data is used only for the analysis and is discarded immediately after — never stored on our servers.
• Beginner-friendlyNo prior Saju knowledge required. The interface and the readings use accessible language so anyone can follow along.
• Free to useCore Saju analysis is free. Optional add-ons like AI counseling fund the running cost.

Operating philosophy

SajuLens treats your chart as a description of innate tendencies, not a fixed verdict. Saju is a tool for self-understanding — not a prophecy. Use the reading to spot your strengths, prepare for likely challenges, and inform better decisions.

For consequential life choices, please combine this reading with professional advice. SajuLens supplements expert consultation; it does not replace it.

Who runs this

SajuLens is an independent project run by a developer with a personal interest in Saju. The goal is simple: bring the value of a long tradition to more people, through modern technology.

Questions or feedback? Reach us via the contact page.