Rat and Rooster compatibility
Friction
The Rat is the branch 子, Yang Water. The Rooster is 酉, Yin Metal. Here is how the two branches meet in the tables Korean saju uses, and how their elements relate.
By the tables, the Rat and the Rooster have friction marks and no combination. That reads as a pair that rubs, not one that can’t work: the friction is usually about habits and timing.
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Branches: 子 and 酉
Break (破)Friction
子 and 酉 form a break. It is read as small cracks: plans that need patching, not a pair that falls apart.
Gwimun (鬼門)Friction
子 and 酉 form a jumpy-nerves pair, a Korean-school reading of heightened sensitivity between two people. Good sleep, steady routines and not reading too much into moods are the usual advice.
Elements: Water and Metal
Metal feeds Water in the generating cycle. The Rooster side tends to give energy, ideas or care, and the Rat side tends to grow with it. Checking that it flows both ways usually helps.
子 is Yang and 酉 is Yin: one of each.
How to read this
A zodiac sign is one character out of eight in a saju chart. For two people, the birth-day pairs, the balance of elements and timing usually say more than the signs do. Treat this page as a tendency, for fun and self-reflection, not a verdict on anyone.

A sign is just one character
Two full charts have sixteen. Enter your birthday, then theirs, and the Moon Rabbit works out your compatibility score for free, on your device.
Questions
Are the Rat and the Rooster compatible?
By the tables, the Rat and the Rooster have friction marks and no combination. That reads as a pair that rubs, not one that can’t work: the friction is usually about habits and timing. It is one character each, so treat it as a tendency. The full charts of both people say more.
Which signs are traditionally closest to the Rat and the Rooster?
By the tables, the Rat’s closest partner (six harmony) is the Ox and its three-sign teammates are the Monkey and Dragon. For the Rooster, the closest partner is the Dragon and the teammates are the Snake and Ox.
Is zodiac compatibility the same as saju compatibility?
No. Zodiac compatibility compares only the two birth-year signs. Saju compatibility compares both full charts, especially the birth-day pairs and how the elements fill each other in. SajuBunny shows that score for free.