Rujing

Tiāntóng Rújìng (天童如淨; Japanese: Tendō Nyojō) (1163–1228) was a Caodong Buddhist monk living in Jìngdé Temple^[1] (景徳寺; Japanese: Keitoku-ji) on Tiāntóng Mountain (天童山; Japanese: Tendōzan) in Yinzhou District, Ningbo. He taught and gave dharma transmission to Sōtō Zen founder Dōgen^[1][2] as well as early Sōtō monk Jakuen (寂円 Jìyuán).

Tiāntóng Rújìng 天童如淨
Title	Chán master
Personal life
Born	(1163-08-08)8 August 1163
Died	18 August 1228(1228-08-18) (aged 65)
Religious life
Religion	Buddhism
School	Caodong/Sōtō
Senior posting
Teacher	Xuedou Zhijian
Predecessor	Xuedou Zhijian
Successor	Eihei Dōgen
Students Eihei Dōgen Jakuen Wuwai Yiyuan

His teacher was Xuedou Zhijian^[1] (雪竇智鑑, 1105–1192), who was the sixteenth-generation dharma descendant of Huineng.

According to Keizan, when Ruijing became a leader, he didn't put himself above the other monks. He wore the black surplice and robe of a monk. He was given a purple vestment of honor by the emperor of China, but he declined it. Even after reaching enlightenment, he was willing to clean the bathroom.^[3]

He is traditionally the originator of the terms shikantaza^[4] and shinjin-datsuraku ("casting off of body and mind").