Are Chinese BaZi, Korean Saju and Japanese Shichu Suimei the same?
Chinese, Korean and Japanese traditions all use four birth-time stem–branch pairs. The eight characters are usually the same, while time conversion, school conventions and interpretive emphasis can differ.
The short answer
They are three branches of a shared method. Each converts the birth year, month, day and hour into four pillars and interprets them through the Five Elements and Ten Gods. The same person's chart will usually have the same eight characters in Chinese, Korean and Japanese tools. Differences in interpretation often reflect conventions rather than a calculation error.
How the method developed
Stem–branch year and day counting was already widespread in the Han dynasty. By the Tang dynasty, birth-time interpretation had developed into a more structured method, primarily centered on the Year Pillar. Li Xuzhong is a prominent figure associated with it.
Xu Ziping, associated with the Five Dynasties and early Song period, made a key shift: the Day Stem, or Day Master, became the reference for the person instead of the Year Pillar. Other characters were read in relation to it. The Ten Gods, strength assessment and useful-element approaches build on this idea, which is why modern BaZi is also called the Ziping method.
The method traveled with classical Chinese texts to the Korean peninsula and Japan, developing locally into today's Saju and Shichu Suimei traditions.
Names and emphases in the three traditions
| Region | Common names | Characteristics |
|---|---|---|
| China | BaZi, Four Pillars, Ziping | Often emphasizes Day Master strength and useful elements, with auxiliary markers such as Peach Blossom and Travel Horse |
| Korea | Saju (사주, Four Pillars); Saju Palja (사주팔자, Eight Characters) | Widely used in everyday consultations about relationships and careers; many terms retain Sino-Korean readings |
| Japan | Shichu Suimei (四柱推命, しちゅうすいめい) | Includes many schools. The Ten Gods are called tsuhensei; terms such as the twelve life stages are common, often with an emphasis on personality |
Why interpretations may differ
- Time conversion: Korea and Japan use UTC+9, one hour ahead of Beijing. Seoul lies near 127° east, but its standard clock is based on 135° east, roughly half an hour ahead of its local mean solar time. Different corrections can move a birth into another double-hour.
- Rule weighting: schools vary in how much weight they give the Month Command and hidden stems when assessing strength and selecting useful elements.
- Auxiliary markers: Chinese practice often uses markers such as Peach Blossom and Travel Horse. Korean usage may differ, while Japanese schools have developed their own terminology.
- Luck-cycle starting age: rounding methods vary, sometimes producing a difference of about a year.
When comparing tools, first check whether the eight characters agree. If they do, compare interpretations. If they do not, first review the birth time and time-zone conversion.
This page introduces traditional culture knowledge for reference only; it makes no predictions or guarantees about fate, health, relationships or wealth.