Tung-shan

Tung-shan Liang-chieh was an ancient Ch'an master who is the credited founder of the Tsao-tung Cha'n lineage, also known as Soto Zen which was brought to Japan by Dogen Zenji. He was the dharma successor of Ungan Donjo . He is said to have attained enlightenment when, wading a river, he glimpsed his reflection in the water. He appears in Case 43 of the Blue Cliff Record. He is the author of the Verses of the Five Ranks.