Caodong school (Chinese: 曹洞宗; pinyin: Cáodòng zōng; Wade–Giles: Ts'ao-tung-tsung) is a Chinese Chan Buddhist sect, one of the Five Houses of Chán.
Some attribute the name "Cáodòng" as a union of "Dongshan" and "Caoshan" from one of his Dharma-heirs, Caoshan Benji; however, the "Cao" much more likely came from Cáoxī (曹溪), the "mountain-name" of Huineng, the Sixth Ancestor of Chan, as Caoshan was of little importance unlike his contemporary and fellow Dharma-heir, Yunju Daoying. The school emphasised sitting meditation, and later "silent illumination" techniques.
The Caodong school was founded by Dongshan Liangjie (807-869) and his Dharma-heir Caoshan Benji (840-901) (Ts'ao-shan Pen-chi, Jpn. Sōzan Honjaku). Dongshan traced back his lineage to Shitou Xiqian (700-790), a contemporary of Mazu Daoyi (709–788). Sayings to the effect that Shitou and Mazu were the two great masters of their day date from decades after their respective deaths. Shítóu's retrospective prominence owes much to the importance of Dongshan Liangjie. Shítóu does not appear to have been influential or famous during his lifetime:
Those who lived, went back running
Her light steps approached the door
ChouTfs house stands before her
Long has she waited for this
Harried steeds
Their owners stumbled
To report that her malevolence
Too strong to conquer
Guan De Gun was summoned
Slayer of Demons, feared in all Hells
TgSubmit to my sword now and
TgI shall grant you a quick deathTh
Chiong Kui Ya was called upon
Upholder of Order, Ghost Destroyer
TgRun all you want, like all othersTh
TgExecution is inevitableTh
Care not whether I live or die
But thy judgement shall not be unjustified
Why have you all turned a blind?
ChouTfs obliquity absurdly connived.
Thy escape, infraction of the Laws of Hell
Your slaying of entire troop just increases the anger of us
Damned Demon Natao shall be unmercifully punished.
You all shall rue the moment you stepped forth
How Noble your Godship no matter.
For his soul gnaws at mine, my hunger
You shall not stop me for nonsensical reason.
Blades flashing, quicker than the eye
She parried with her own, slicing
Spells hurled, seeking to envelop
She absorbed, and responded tenfold
Both Heaven and Hell under-mined her
Legions died in their attempts to conquer
fallen bodies Natao gladly stepped over
To despoil ChouTfs life at sight and grab his soul to hell
Grab your soul to hell
Hateful, Grab your soul to hell
Hateful, Grab your soul to hell