Saju vs BaZi: the Korean and Chinese Four Pillars, compared
If you have looked up Korean saju in English, you have probably run into BaZi (八字), the Chinese Four Pillars of Destiny. Are they the same thing? Mostly yes, with a few differences worth knowing.
Same roots, same math
Both come from the same classical Chinese system of reading a birth moment through heavenly stems, earthly branches and the five elements. The approach that centers the reading on the Day Master is traditionally credited to Xu Ziping of the Song dynasty, which is why it is sometimes called the Ziping method. The system traveled to Korea, where it became saju, and to Japan, where it is known as Shichū Suimei (四柱推命).
Because the calendar math is shared, your four pillars in Korean saju are the same eight characters you would get from a Chinese BaZi calculator. Charts can differ only in edge cases, such as births right around midnight or within a day of a seasonal turning point (a solar term).
Same characters, different names
The characters are read aloud in each language's own way. Take the pillar 丙午, the sun sitting on the Horse:
- Korean saju: Byeong-o (병오)
- Chinese BaZi: Bing Wu
- Japanese: Hinoe-uma
Korean also names years with a color and an animal: 2024 was the Blue Dragon, 2026 is the Red Horse and 2027 will be the Red Goat. The color comes from the element of the year's stem.
Where the practice differs
- Birth hour: Korea's clock runs about thirty minutes ahead of the sun in Seoul, so many Korean readers shift each two-hour block by half an hour (the Rat hour becomes 11:30 PM to 1:30 AM). Hanok Saju uses standard two-hour blocks of your local clock time, because our visitors are born all over the world.
- Everyday use: In Korea, saju is woven into ordinary life: New Year fortunes, compatibility checks before marriage, picking dates and names, and saju cafés where friends go for fun.
- Reading style: Korean readings tend to be conversational and practical, built around relationships, work and timing. Many BaZi resources in English focus more on technical element balance. Both draw on the same toolkit.
So which one should you use?
Your chart is the same either way, so pick the language and style that speak to you. If you love Korean culture, saju gives you the Korean names, the Korean color-and-animal years and the way Koreans actually talk about their charts.
Find your four pillars in Korean saju, or browse all 60 day pillars with their Korean and Chinese names.