The short answer
Korean Saju and Chinese BaZi share the Four Pillars and eight-character chart structure. Both arrange the year, month, day, and hour into Heavenly Stems and Earthly Branches. They should not be presented as completely unrelated systems.
The difference is better understood through the language, texts, schools, and cultural settings in which the shared structure has been interpreted.
Two names for the same basic chart form
Saju (사주, 四柱) means Four Pillars. Saju palja adds palja (八字), or eight characters. BaZi is the Mandarin reading of the same characters for “eight characters.”
In both contexts, the chart contains:
- four birth coordinates: year, month, day, and hour
Where differences can appear
Readers may differ in calculation boundaries, terminology, emphasis, and interpretive lineage. Those differences can occur between Korean and Chinese traditions, but they can also occur between practitioners within the same country.
For that reason, “Saju always does X while BaZi always does Y” is usually too broad. It is more useful to ask which calendar rules, reference texts, and reading method a particular service follows.
What makes Sajufy specifically Korean?
Sajufy uses the Korean name Saju and presents the chart through Korean visual and editorial language. The Guardian draws on the sixty-part birth-year cycle, while the reading surface takes inspiration from hanji and minhwa.
That cultural framing does not erase the system’s wider East Asian history. It explains the lens through which Sajufy introduces the Four Pillars to English-speaking readers.
What should a reader compare between services?
Look beyond the label. Ask whether a service:
Those choices affect the quality of the experience more directly than whether the homepage uses the word Saju or BaZi.