Shítóu Xīqiān (700-790) (traditional Chinese: 石頭希遷; simplified Chinese: 石头希迁; pinyin: Shítóu Xīqiān; Wade–Giles: Shih-t'ou Hsi-ch'ien; Japanese: Sekitō Kisen) was an 8th-century Chinese Chán (Zen) Buddhist teacher and author. All existing branches of Zen throughout the world are said to descend either from Shitou Xiqian or from his contemporary Mazu Daoyi.