Tozan Talks

Dongshan Liangjie (807–869) (Chinese: 洞山良价; pinyin: Dòngshān Liángjiè; Wade–Giles: Tung-shan Liang-chieh; Japanese: Tōzan Ryōkai; Korean: Tongsan Lianggye; Vietnamese: Động Sơn Lương Giới) was a Chan Buddhist monk of the Tang dynasty. He founded the Caodong school (Chinese: 曹洞宗), which was transmitted to Japan in the thirteenth century (Song-Yuan era) by Dōgen and developed into the Sōtō school of Zen.

The Song of the Precious Mirror Samadhi has been attributed to him by the Chinese tradition. However, modern scholars now argue that there is no evidence for this and that this text first appears in the 12th century.

From Dongshan Liangjie on Wikipedia