Saju (사주, 四柱) is Korean astrology based on the Four Pillars of Destiny - your birth year, month, day, and hour. It uses the Five Elements (Wood, Fire, Earth, Metal, Water) and 12 animal signs to analyze personality and compatibility. IdolSaju offers a free Saju calculator.

IdolSaju is a FREE K-Pop idol compatibility calculator using authentic Korean Saju (사주) astrology to calculate your cosmic connection with over 350 K-Pop idols including BTS, Stray Kids, SEVENTEEN, NewJeans, aespa, and more.

How does Korean Saju astrology work?

Saju (사주) is based on the Four Pillars of Destiny: Year, Month, Day, and Hour. Each pillar contains a Heavenly Stem and Earthly Branch, creating a unique cosmic profile for compatibility analysis.

Which K-Pop groups are available?

IdolSaju features 350+ idols: NewJeans, aespa, IVE, LE SSERAFIM, RIIZE, BOYNEXTDOOR, TWS, ILLIT, Stray Kids, ENHYPEN, TXT, BTS, BLACKPINK, SEVENTEEN, TWICE, and many more.

Yes! Free tier shows your top matches. Pro (€4.99/month) includes detailed analysis and daily horoscopes.

How is Saju different from Bazi?

Saju and Bazi (八字) are the same Four Pillars astrology system. Saju is the Korean term, Bazi is Chinese. Both calculate destiny from birth date and time using Heavenly Stems and Earthly Branches.

K-Pop & Saju Insights

Blog

K-Pop insights & Saju guides

Featured

guide#examples#tips

What K-Pop Demon Hunters Gets Right About Korean Fortune Telling

Did you know that some K-pop demon hunters incorporate elements of traditional Korean fortune telling into their routines? Based on my experience, these shows b

9 min read16 viewsabout 4 hours ago

Read article

guide#fire horse#2026

2026 Is the Year of the Fire Horse (And It Only Happens Every 60 Years)

2026 isn't just any Horse year - it's a Fire Horse year, happening only once every 60 years. Here's what K-pop fans should know about this rare zodiac event.

7 min read24 views1 day ago

Read article

guide#day pillar#saju

Your Day Pillar Matters Way More Than Your Zodiac Year

Okay so I need to get something off my chest. Every time someone asks me "what's your zodiac sign?" and expects that to tell them everything about compatibility

7 min read28 views1 day ago

Read article